DE102014111364A1 - A method of determining the decomposition state of a person buried in a grave site, decay state measuring device and computer program therefor - Google Patents

Abstract

The invention relates to a method for determining the decomposition state of a person buried in a grave site with the following steps:
a) picking up gases from the soil from a position close above the earth-buried person,
b) carrying out a gas analysis of the gases taken with determination of concentrations of individual gas constituents, in particular an on-site analysis at the digging point,
c) comparing the determined concentrations of the gas constituents with previously determined target concentrations and / or combinations of target concentrations for certain decomposition states,
d) Determining a state of decomposition characteristic variable from this.
The invention further relates to a decomposition state measuring device and a computer program.

Description

The invention relates to a method for determining the decomposition state of a person buried in a grave site according to claim 1. The invention further relates to a decay state measuring device according to claim 10 and to a computer program according to claim 13.

In general, the invention relates to the determination of the decay state of a buried person. The knowledge of the state of decomposition is helpful in many cases, e.g. to determine without exhumation, whether a grave site can be refilled, or to gain advance knowledge of an intended, judicially arranged exhumation, or to check how well the soil condition of a cemetery is suitable for earth burials. It is known that some cemeteries sometimes unfavorable mortality conditions are given with the consequence of decomposition disorders. The most commonly known form of disorder of decomposition is the formation of so-called fatty wax corpuscles (adipocice formation). One possible cause may be e.g. be an oxygen deficiency in a particular type of soil or a specific water situation in the soil. The type of grave filling and the burial cover also influence the mining processes. Furthermore, coffin material and casket equipment have a significant influence on the degradation process.

The invention is therefore based on the object of specifying a method, a device and a computer program, with the aid of which information about the decay state of a person buried in a grave site can be obtained with little effort, in particular without exhumation.

• a) Aufnehmen von Gasen aus dem Erdreich von einer Position nahe oberhalb der erdbestatteten Person,
• b) Durchführen einer Gasanalyse der aufgenommenen Gase mit Bestimmung von Konzentrationen einzelner Gasbestandteile, insbesondere eine Vor-Ort-Analyse an der Grabstelle,
• c) Vergleichen der ermittelten Konzentrationen der Gasbestandteile mit vorab ermittelten Sollkonzentrationen und/oder Kombinationen von Sollkonzentrationen für bestimmte Verwesungszustände,
• d) Ermitteln einer den Verwesungszustand kennzeichnenden Größe hieraus.

This object is achieved according to claim 1 by a method for determining the decomposition state of a person buried in a grave site with the following steps:

• a) picking up gases from the soil from a position close above the earth-buried person,
• b) carrying out a gas analysis of the gases taken with determination of concentrations of individual gas constituents, in particular an on-site analysis at the digging point,
• c) comparing the determined concentrations of the gas constituents with previously determined target concentrations and / or combinations of target concentrations for certain decomposition states,
• d) Determining a state of decomposition characteristic variable from this.

The invention has the advantage that in a simple and rapid manner a variable characterizing the state of putrefaction can be determined, so that further insights can be obtained therefrom, e.g. on the possibility of repopulating a grave or for a cemetery restoration. For this investigation, no grave opening is required, so that the time and expense is relatively low. Due to the possibility of an on-site analysis at the grave site, an investigation result about the state of decomposition can be obtained almost immediately. The investigation can then be carried out easily at several grave sites of a cemetery, so that in a simple and fast way and large-scale information that characterize a cemetery, can be obtained.

According to an advantageous development of the invention, certain combinations of concentrations of gas components are classified and assigned to certain discrete decomposition states. In a later determination of the size of the decay characterizing this classification can be used. This has the advantage that a clear and rapid determination of certain discrete decomposition states is possible, e.g. a distinction between complete and partial decay and between certain decomposition disorders, such as the crawl bodies.

According to an advantageous development of the invention, the determination of a state indicative of the decay state is carried out with additional consideration of the type of soil, the nature of the soil and / or certain soil fractions. As a soil type, e.g. between sandy soils, loamy soils and clayey soils. With regard to the soil condition, a distinction can be made between light, medium and heavy soils and, if necessary, also according to their degree of loosening. With respect to the particular soil fractions, it is possible to distinguish between the soil constituents naturally contained in the soil and, optionally, gravel additives such as e.g. the coffin material and the casket equipment.

According to an advantageous embodiment of the invention, the excluded via a soil sensor from the ground gases are arranged above the soil, connected to the ground sensor connected portable gas analyzer and by means of this gas analyzer an on-site analysis of the absorbed gases is performed. This has the advantage that the gas analyzer is not underground must be arranged. Commercially available gas analyzers, in particular portable gas analyzers in the form of handheld devices, can be used. For connection of the soil sensor with the gas analyzer for transmitting the absorbed gases, for example, a hose, a tube or any other suitable elongate hollow body-shaped object can be used.

• a) Abteufen eines mobilen Bodensensors oberhalb der Grabstelle bis zu einer Position nahe oberhalb der erdbestatteten Person und Einsaugen von Gasen aus dem Erdreich durch wenigstens eine Einsaugöffnung des Bodensensors und/oder
• b) Einsaugen von Gasen aus dem Erdreich durch wenigstens eine Einsaugöffnung eines im Erdreich angeordneten stationären Bodensensors.

According to an advantageous development of the invention, the uptake of gases from the soil takes place by:

• a) sinking a mobile floor sensor above the digging point to a position close above the earth-buried person and sucking in gases from the ground through at least one suction opening of the floor sensor and / or
• b) sucking in gases from the soil through at least one suction opening of a stationary soil sensor arranged in the ground.

According to variant a), a mobile floor sensor is used, e.g. in the form of a ground lance, which is driven above the grave in the ground. At the lower end of the ground lance, e.g. one or more suction openings are located.

Alternatively or in combination with variant a), it is also possible to use one or more ground sensors arranged so as to be stationary in the ground to draw in gases. These may e.g. be formed in the form of arranged in the soil elongated hollow bodies, which are connected either via individual compounds from the soil with the gas analyzer or are coupled together to form a pipe system. As hollow bodies, e.g. Tubes or similar elongated hollow body-shaped objects are used.

The stationary ground sensors are particularly suitable for longer term monitoring of gas concentrations in the soil, e.g. to monitor and / or analyze cemeteries. The mobile floor sensor is particularly suitable for mobile single measurements at grave sites. In particular, by the possibility of dropping the mobile floor sensor, the gas analysis can be performed at different depths. Thus, at one and the same digging point, the soil sensor can first be sunk to a first depth, a gas analysis can be carried out, then a second depth, a further gas analysis can be carried out, etc., until a target depth near the earth-buried person has been reached. Thus, the mobile floor sensor may e.g. in 10 cm increments are driven into the ground. In this way, a gas concentration profile can be determined over the depth.

The target depth for the suction port, i. a position close above the earth-buried person that provides particularly meaningful gas analysis results is e.g. at a depth of 0.8 m to 1.8 m below the surface of the earth, in particular in the range of 1.0 m to 1.4 m.

According to an advantageous embodiment of the invention, the suction opening is arranged at a depth below the nominal depth of the coffin lid at the grave site. Thus, e.g. the floor sensor is sunk to a depth below the nominal depth of the coffin lid. The nominal depth of the coffin lid is understood to be that depth below the surface of the earth in which the casket lid is in its original state, i. at the funeral, is located. It has been shown that after a certain residence time in the ground, the coffin material decomposes and the coffin lid breaks in, so that it finally lies below the nominal depth. This effect can be used to arrange the floor sensor or its suction as close as possible to the earth-buried person, without affecting the coffin or the person. In this way, particularly meaningful gas analysis results can be achieved.

According to an advantageous development of the invention, at least the following gaseous constituents are analyzed with regard to their concentration in the gases taken up in the gas analysis: oxygen, carbon dioxide. It has been found through research that these gas fractions are significant indicators of the decay condition of a buried person. In addition, the concentration of other gas components can be analyzed, e.g. Hydrogen sulphide, methane, ammonia. In this way, further indicators can be derived, which provide additional indications of certain decomposition states or decomposition disorders, in particular depending on the soil type.

In accordance with an advantageous development of the invention, a decomposition disorder is inferred in the case of a significantly reduced oxygen concentration compared to the ambient air and a greatly increased carbon dioxide concentration, if appropriate with measurable proportions of methane and hydrogen sulfide. in this connection the realization is used that in a Verwesungsstörung partially tissue components are preserved and the secretion of corpse lipid has taken place. In the area of the coffin or the Sargreste the oxygen concentration may, for example, have dropped to 0.5% by volume, the carbon dioxide concentration may have risen to 20% by volume.

According to an advantageous embodiment of the invention is at a carbon dioxide concentration, which is increased in comparison to the ambient air, and closed with respect to the ambient air significantly decreased oxygen concentration on a delayed decay. In delayed decay, tissue degradation has already occurred but slow degradation of humic organic matter occurs. The carbon dioxide concentration may in particular be increased by at least 2% by volume relative to the ambient air, in particular by about 3% by volume to 4% by volume. The oxygen concentration may have dropped to about 12% by volume to 18% by volume.

According to an advantageous embodiment of the invention is closed at low accumulations of carbon dioxide and slight reduction of the oxygen concentration in comparison to the ambient air to a complete decomposition. As a complete decay is understood in particular a state of complete skeletonization.

Such a distinction into the decomposition states of "complete decay," "delayed decay," and "decay" can provide the insights necessary for graveyard management and cemetery condition analysis.

The above-mentioned object is further achieved by a decomposition state measuring device having at least one bottom sensor and at least one gas analyzer coupled to the bottom sensor, wherein the decomposition state measuring device is configured to carry out a method of the type described above. The floor sensor may in particular be a mobile floor sensor and / or a floor sensor arranged stationarily in the ground, as already described above. By means of such a decomposition state measuring device, the aforementioned advantages can be achieved. Hereby, some of the method steps, e.g. optionally determining the size indicative of the decay state manually by the user from a table containing an association between gas concentrations and decay states, or automatically by the decay state measurement device.

According to an advantageous development of the invention, the decomposition state measuring device has an evaluation device which is set up for automatically classifying the concentrations of gas constituents determined by the gas analysis device and for the automatic determination of the decomposition state derived therefrom. This has the advantage that the entire evaluation and classification can be carried out automatically by the decay state measuring device, so that the user is relieved of such work. It can be used as a final result e.g. on a display device of the decomposition state measuring device, the derived decomposition state is displayed, e.g. "Complete decay", "delayed decay" or "decay".

According to an advantageous development of the invention, the decomposition state measuring device has at least one pump, which is set up to pump gases received via the soil sensor to the gas analysis device. In particular, the pump may be part of the gas analyzer, e.g. structurally integrated into the gas analyzer. The pump has the advantage that the supply of the gases received via the bottom sensor to the gas analysis device takes place relatively quickly in a defined manner.

The object mentioned at the outset is furthermore achieved according to claim 13 by a computer program with program code means, set up for carrying out a method of the type described above, when the computer program is executed on a computer. So the computer program can e.g. stored in a memory, e.g. a memory of the evaluation device of the decomposition state measuring device and on a computer, e.g. on a microprocessor or microcontroller, the evaluation are executed.

The invention will be explained in more detail by means of embodiments using drawings.

Show it

1 a decomposition state measuring device and

2 and 3 the use of the decomposition state measuring device according to 1 at a grave site and

4 a further embodiment of a decomposition state measuring device and

5 to 7 Gas concentrations over the depth below the Earth's surface in different decomposition states and

8th to 10 the influence of soil type, soil conditions and soil fractions on carbon dioxide concentration.

In the figures, like reference numerals are used for corresponding elements.

In the 1 shown decomposition state measuring device has a bottom sensor 1 in the form of a ground lance, a mobile gas analyzer 2 and a connecting hose 3 for connecting the soil lance 1 with a gas supply connection of the gas analyzer 2 , The gas analyzer 2 has a housing 20 with one in the housing 20 integrated pump 21 on. About the pump 21 can be sucked in to be analyzed gases and measuring sensors of the gas analyzer 2 be supplied. The gas analyzer 2 also has, for example, on an upper side of the housing 20 arranged controls 23 , eg in the form of buttons, as well as a display element 22 , eg in the form of a display. It can be used, for example, a gas detector called microtector G460 GFG.

The ground lance 1 has a hollow main body 11 on, for example in the form of a hollow tube made of stainless steel. The main body 11 is at the bottom with a tip 13 completed. The summit 13 For example, it can be screwed to the main body via a thread. At the top is the main body 11 via a screwable drill head 10 completed. This has a side-mounted hose adapter for connecting the hose 3 on. The total length of the ground lance 1 can be 1.6 m, for example. In an advantageous embodiment are at the bottom lance 1 at a distance of eg 10 cm markings attached, so that the momentary penetration depth of the ground lance 1 in the ground can be read from it.

At the bottom, the main body points 11 intake vents 12 on, for example, may be slit-shaped. In the example shown, the slot-shaped intake openings 12 only in the lower, 10 cm long area of the main body 11 intended.

In an exemplary embodiment, the gas analyzer 2 for the individual concentrations of the gas components to be determined, the following measuring ranges: gas measuring unit Reading area measurement accuracy O ₂ [% By volume] 0-25 0.1 CO ₂ [% By volume] 0-25 0.01 CH ₄ [% By volume] 0-100 0.01 H ₂ S [Ppm] 0-500 0.5 NH ₃ [Ppm] 0-200 1

By means of the decomposition state measuring device according to 1 For example, a single examination of the decay state of a person buried in a grave site can be performed. It can also be carried out a step study to the tomb area, where the bottom lance 1 is gradually sunk further and each one gas analysis is performed. This is below on the basis of 2 and 3 explained. In the 2 and 3 is each a grave site 4 with one at a nominal depth T _N below the earth's surface 5 buried coffin in the ground 40 shown. The nominal depth T _N refers to the top of the coffin lid 41 in the 2 and 3 shown only by dashed lines, since it is assumed that this has already occurred by rotting processes of coffin material.

The 2 shows the Veresungszustandsmessinrichtung with abgegituften in a small depth T ₁ bottom lance 1 , the 3 with a further down to a depth T ₂ abgeteuften bottom lance 1 , Here let T ₂ > T _N.

The sequence of a step investigation into the grave area of the grave site 4 can be done as follows. The ground lance 1 is over the hose 3 with the gas analyzer 2 connected. The ground lance 1 gets into the soil of the grave site 4 ie above the coffin 40 , first to a depth T ₁ , for example, 30 cm, pressed or hammered. At this depth, sufficient soil strength is present so that the ground lance 1 without foreign aid in the ground stops.

It will then be the pump 21 of the gas analyzer 2 actuated. This will be via the intake 12 , the hollow tube 11 , the drill head 10 and the hose 3 Gases from the soil above the coffin 40 and thus the earth-buried person in the gas analyzer 2 sucked. There it can be analyzed. After only a few seconds, the gas analyzer will start 2 determines the composition of the gas mixture from the depth range T ₁ and is available as a readable value on the display device 22 to disposal. The displayed values, ie the concentrations of the individual gas constituents, can either be further processed automatically or documented by hand. Furthermore, the determined gas concentrations over a in the gas analyzer 2 integrated memory card are stored. Now the bottom lance can 1 pushed deeper into the ground or beaten, eg 10 cm deeper. Here, the pump 21 continue to be in operation and it can be a continuous analysis of the soil air, ie the sucked gases done. At the next depth, in turn, the concentration of the individual gas constituents is determined and documented as explained above. In further steps, eg 10 cm-wise, the bottom lance can 1 be further pressed into the ground or beaten. From a depth of about 90 cm is to be expected that there is the coffin 40 located. This depth is considered to be the relevant depth of measurement, because according to valid hygiene requirements a burial earth cover of 90 cm at the time of burial is to be observed. If the coffin is decomposed, it offers the bottom lance 1 no resistance. In this case, a gas measurement can be carried out in further depth sections. For deeper lying coffins, the bottom lance 1 be used to a depth of 160 cm. Depending on the state of decomposition, the step measurement method can illustrate a pronounced concentration gradient of individual gas components.

If the digging depth is known exactly, the measurement can also take place immediately at this depth, eg according to 3 in depth T ₂ .

• 1. In Böden ohne bisherige Grabnutzung lassen sich Gaskonzentrationen nachweisen, die nahezu der natürlichen Zusammensetzung der Außenluft entsprechen.
• 2. In Böden mit Grabnutzung ist je nach Verwesungszustand zu differenzieren: a) Bei vollständiger Skelettierung kann es zu geringen Anreicherungen von Kohlendioxid und leichter Absenkung der Sauerstoffkonzentration im Bereich des Sarges bzw. der Sargreste kommen. b) Bei verzögerter Verwesung hat der Gewebeabbau bereits stattgefunden, jedoch findet ein langsamer Abbau humoser organischer Substanz statt. Die Kohlenstoffdioxidkonzentration im Bereich des Sarges bzw. der Sargreste ist erhöht (ca. 3 bis 4 Vol-%) und die Sauerstoffkonzentration deutlich abgesunken (ca. 12 bis 18 Vol-%). c) Bei einer Verwesungsstörung sind z.T. Gewebebestandteile erhalten und es hat die Absonderung von Leichenlipid stattgefunden. Im Bereich des Sarges bzw. der Sargreste sind neben deutlich gesunkenen Sauerstoffkonzentrationen (bis auf 0,5 Vol-%) und stark gestiegenen Kohlenstoffdioxidkonzentration (bis auf 20 Vol-%), auch Methan und Schwefelwasserstoff messbar.
• 3. Innerhalb des Bodenprofils ist ein deutliches Konzentrationsgefälle erkennbar. Da bei der Grabanlage meist eine Erdüberdeckung von 90 cm über dem Sarg durchgeführt wird, lassen sich nennenswerte Änderungen der Gaskonzentrationen erst knapp oberhalb des Sarges oder im zersetzten Sarg messen.
• 4. Es lassen sich Messbereiche definieren, in denen anhand der gemessenen Gaskonzentrationen ein spezieller Verwesungszustand zu erwarten ist. Es werden die folgenden Verwesungszustände in einem Sarg-Erdgrab nach Ablauf der Ruhefrist unterschieden: • Vollständige Verwesung • Verzögerte Verwesung • Verwesungsstörung

Previous studies with the described technical equipment have shown for the first time that it is possible to determine different gas concentrations in soils. Repeated measurements on past graves show that the values of the measured gas concentrations can be reproduced.

• 1. In soils without previous grave use can detect gas concentrations that correspond to almost the natural composition of the outside air.
• 2. In soils with grave use, depending on the state of decay, a distinction must be made: a) Complete skeletonization may lead to low accumulation of carbon dioxide and a slight reduction in oxygen concentration in the area of the coffin or the casket. b) Delayed decay has already seen tissue degradation but there is a slow degradation of humic organic matter. The carbon dioxide concentration in the area of the coffin and the coffin remains increased (about 3 to 4% by volume) and the oxygen concentration dropped significantly (about 12 to 18% by volume). c) In a disorder of disorder tissue constituents are partly preserved and the secretion of corpse lipid has taken place. In the area of the coffin and the casket, in addition to significantly reduced oxygen concentrations (up to 0.5% by volume) and greatly increased carbon dioxide concentration (up to 20% by volume), also methane and hydrogen sulphide can be measured.
• 3. Within the soil profile, a clear concentration gradient can be seen. Since the burial ground is usually 90 cm above the coffin, significant changes in gas concentrations can only be measured just above the coffin or in the decomposed casket.
• 4. Measuring ranges can be defined in which, based on the measured gas concentrations, a special decomposition state can be expected. The following decomposition states in a coffin burial ground are distinguished after expiration of the rest period: • Complete decay • Delayed decay • Dislocation disorder

• 5. Je nach Bodengruppen können Messbereiche der Gas-Konzentrationen definiert werden, die einen Rückschluss auf Verwesungsstörungen zulassen. Die Einteilung der Böden erfolgt in folgenden Gruppen: • Leichte Böden • Mittlere Böden • Schwere Böden

Below are some examples of different decomposition states with corresponding gas measurement.

• 5. Depending on the soil groups, measuring ranges of the gas concentrations can be defined, which allow a conclusion on decomposition disorders. Soil is divided into the following groups: • Light soils • Medium soils • Heavy soils

Gas concentrations in case of decomposition disorders underbody Light medium Heavy tracer gas Concentration range O ₂ [% by volume] <16 <12 <8 CO ₂ [vol%] > 4 > 6 > 10 CH ₂ [% by volume] If occurrence, then additional indication. H ₂ S [ppm]

The 5 shows with the decomposition state measuring device according to 1 at different depths of the ground lance 1 determined gas concentrations of the gas constituents oxygen and carbon dioxide in a coffin burial ground with complete decomposition of earth-buried persons. The 6 shows the results with the same conditions, but with delayed decay. The 7 shows the measurement results under the same conditions, but in the case of a dysfunction.

Based on 4 a further embodiment of a decomposition state measuring device is explained, in which a soil sensor stationarily arranged in the ground 1 is available. The soil sensor 1 can be a hollow tube 14 having a larger diameter, for example, a KG tube with 30 cm diameter. The hollow tube 14 is with gas sensors carried laterally through the pipe wall 15 stocked. The gas receivers 15 have at their in the interior of the hollow tube 14 pointing side intake openings for drawing in gases from the ground. On its outer side are the Gasaufnehmer 15 via individual hoses 30 with one away from the grave site 4 arranged in the earth's surface airtight coupling 31 connected. To the airtight coupling 31 is the hose 3 of the gas analyzer 2 connectable or also connected in the example shown. The hose 3 can be attached to different coupling points of the coupling 31 be connected to gases from each one of the gas receiver 15 the gas analyzer 2 supply. The interior of the hollow tube 14 can be filled with soil, for example.

The 8th to 10 show with the second embodiment of the decomposition state measuring device according to 4 recorded over a longer period of measurement results. The individual measured curves were recorded on different days in a period of eg one month. The 8th shows the measured carbon dioxide concentration in a naturally stored loess soil, the 9 in a compacted loess soil. The 10 shows the carbon dioxide concentration in a compacted loess soil with compost and chaff ingredients. It can be seen that there is a significant increase in carbon dioxide concentration in compacted soils, with a further increase in the addition of compost and chaff ingredients.

From this knowledge can be gained for an optimization of cemetery grounds. So a soil compaction leads to a measurable change in the carbon dioxide concentration. The addition of compost and chaff ingredients results in significant oxygen depletion and a measurable increase in carbon dioxide concentration in the soil. The combination of soil compaction and use of a substrate enriched with compost and chaff constituents results in extreme gas concentrations of 0.3 vol% oxygen and 25.5 vol% carbon dioxide at depths between 1.3 m and 1.8 m ( 10 ).

Claims (13)

Method for determining the state of decay of a person in a dig ( 4 ) earth person with the following steps: a) picking up gases from the ground from a position close above the earth-buried person, b) carrying out a gas analysis of the ingested gases with determination of concentrations of individual gas constituents, in particular an on-site analysis at the dig, c) comparing the determined concentrations of the gas constituents with previously determined target concentrations and / or combinations of target concentrations for certain decomposition states, d) determining a state indicative of the decay state thereof. A method according to claim 1, characterized in that certain combinations of concentrations of gas components are classified and assigned to certain discrete decomposition states, which is used in a later determination of the decay condition characterizing this classification. Method according to one of the preceding claims, characterized in that the determination of a state indicative of the decay state is carried out with additional consideration of the soil type, the soil condition and / or certain soil fractions. Method according to one of the preceding claims, characterized in that via a soil sensor ( 1 ) gases collected from the soil are arranged above the soil, with the soil sensor ( 1 ) portable gas analyzer ( 2 ) and by means of this gas analyzer ( 2 ) an on-site gas analysis is performed. Method according to one of the preceding claims, characterized in that the uptake of gases from the soil is carried out by: a) sinking a mobile soil sensor ( 1 ) above the grave site ( 4 ) to a position close above the earth-buried person and sucking in gases from the ground through at least one suction opening ( 12 ) of the soil sensor ( 1 ) and / or b) sucking in gases from the soil through at least one suction opening ( 12 ) of a stationary soil sensor ( 1 ). Method according to one of the preceding claims, characterized in that, in the gas analysis, at least the following gaseous constituents are analyzed with regard to their concentration in the gases taken up: oxygen, carbon dioxide. Method according to one of the preceding claims, characterized in that at a relative to the ambient air significantly reduced oxygen concentration and a greatly increased carbon dioxide concentration, possibly with measurable proportions of methane and hydrogen sulfide, is concluded on a Verwesungsstörung. Method according to one of the preceding claims, characterized in that is closed at a carbon dioxide concentration, which is increased in comparison to the ambient air, and a relation to the ambient air significantly decreased oxygen concentration on a delayed decay. Method according to one of the preceding claims, characterized in that at low accumulations of carbon dioxide and slight reduction of the oxygen concentration in comparison to the ambient air is concluded on a complete decomposition. Decay state measuring device with at least one bottom sensor ( 1 ) and at least one with the soil sensor ( 1 ) coupled gas analyzer ( 2 ), wherein the decomposition state measuring device is arranged for carrying out a method according to one of the preceding claims. Decay state measuring device according to claim 10, characterized in that the decay state measuring device has an evaluation device which is used for automatic classification of the gas analyzer ( 2 ) and for automatically determining the decomposition state to be derived therefrom. Decay state measuring device according to claim 10 or 11, characterized in that the decomposition state measuring device comprises at least one pump ( 21 ) for pumping over the floor sensor ( 1 ) absorbed gases to the gas analyzer ( 2 ) is set up. Computer program with program code means, set up for carrying out a method according to one of claims 1 to 9, when the computer program is executed on a computer.

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