CN111487331B - 一种针对环境样品中微量尼龙6和尼龙66的定量检测方法 - Google Patents
一种针对环境样品中微量尼龙6和尼龙66的定量检测方法 Download PDFInfo
- Publication number
- CN111487331B CN111487331B CN201910088486.1A CN201910088486A CN111487331B CN 111487331 B CN111487331 B CN 111487331B CN 201910088486 A CN201910088486 A CN 201910088486A CN 111487331 B CN111487331 B CN 111487331B
- Authority
- CN
- China
- Prior art keywords
- nylon
- environmental samples
- acid
- trace amounts
- adipic acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229920002302 Nylon 6,6 Polymers 0.000 title claims abstract description 36
- 230000007613 environmental effect Effects 0.000 title claims abstract description 30
- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 229920002292 Nylon 6 Polymers 0.000 title abstract description 25
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims abstract description 50
- SLXKOJJOQWFEFD-UHFFFAOYSA-N 6-aminohexanoic acid Chemical compound NCCCCCC(O)=O SLXKOJJOQWFEFD-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000001361 adipic acid Substances 0.000 claims abstract description 25
- 235000011037 adipic acid Nutrition 0.000 claims abstract description 25
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229960002684 aminocaproic acid Drugs 0.000 claims abstract description 22
- 239000000178 monomer Substances 0.000 claims abstract description 12
- 239000000428 dust Substances 0.000 claims abstract description 9
- 239000013049 sediment Substances 0.000 claims abstract description 6
- 239000010802 sludge Substances 0.000 claims abstract description 6
- 239000002689 soil Substances 0.000 claims abstract description 6
- 238000004128 high performance liquid chromatography Methods 0.000 claims abstract description 5
- 238000004885 tandem mass spectrometry Methods 0.000 claims abstract description 5
- 230000002378 acidificating effect Effects 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 claims description 22
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 10
- 239000012498 ultrapure water Substances 0.000 claims description 10
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 238000002414 normal-phase solid-phase extraction Methods 0.000 claims description 3
- 239000012295 chemical reaction liquid Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- WWZKQHOCKIZLMA-UHFFFAOYSA-N Caprylic acid Natural products CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 claims 1
- 125000003277 amino group Chemical group 0.000 claims 1
- GONOPSZTUGRENK-UHFFFAOYSA-N benzyl(trichloro)silane Chemical compound Cl[Si](Cl)(Cl)CC1=CC=CC=C1 GONOPSZTUGRENK-UHFFFAOYSA-N 0.000 claims 1
- 210000003608 fece Anatomy 0.000 claims 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N n-hexanoic acid Natural products CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims 1
- 230000020477 pH reduction Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 239000007791 liquid phase Substances 0.000 abstract description 2
- 230000035484 reaction time Effects 0.000 abstract description 2
- 239000012472 biological sample Substances 0.000 abstract 2
- 239000000523 sample Substances 0.000 abstract 1
- 229920000426 Microplastic Polymers 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000001294 liquid chromatography-tandem mass spectrometry Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012306 spectroscopic technique Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N2030/062—Preparation extracting sample from raw material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N2030/067—Preparation by reaction, e.g. derivatising the sample
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
本发明公开了一种针对环境样品如室内灰尘、污泥、降尘、食品、沉积物、土壤和生物样品中微量尼龙6和尼龙66的定量检测方法。先将环境样品中尼龙6和尼龙66在酸性水相加压环境中解聚,再分离回收其单体氨基己酸和己二酸,通过高效液相色谱串联质谱定量检测反应前后单体质量浓度,再通过公式回溯计算出样品中尼龙6和尼龙66的原始质量百分浓度。此方法可普遍应用于如室内灰尘、污泥、降尘、食品、沉积物、土壤和生物样品,应用广泛;能够定量检测到将环境样品中微量(最低可至0.1mg/kg)的尼龙6和尼龙66;在硫酸加热处理前无需任何特殊处理;使用加压、高温和40%硫酸液相的反应条件能够大大的减少反应时间。
Description
技术领域
本发明涉及环境监测技术领域,尤其涉及一种针对如室内灰尘、污泥、降尘、食品、沉积物和土壤中微量尼龙6和尼龙66的定量检测方法。
背景技术
微塑料(Microplastics,简称MPs)是新兴的环境污染物,全球每年塑料的产量约为3亿吨,而其中大约10%的塑料最终将破碎成微塑料进入环境。而由于大多数种类微塑料的难降解性,大量的微塑料可能保留积累在自然环境中。目前对于微塑料的检测方法主要针对其物理和形态特征使用一些如显微红外和拉曼光谱等显微镜检测和光谱技术,而定量方法只能通过计数量化,而且检测前需要将样品中微塑料预先分离,这就造成了更大的系统误差。聚酰胺(Polyamide,PA)俗称尼龙(Nylon),是目前工业中广泛应用的一种工程塑料和纤维材料,而其中又以PA6(Polyamide 6)和PA66(Polyamide 6,6)应用最为广泛,其世界年产量分别达到了430万吨和340万吨。在对环境中微塑料的检测时,PA6和PA66常常被检测到,但不同环境样品中PA6和PA66的浓度无法定量检测。因此,开发一种能够定量的检测微量的PA6和PA66,且能够应用于不同的环境样品的方法是十分有必要的。
发明内容
本发明提供了一种针对不同环境样品中微量PA6和PA66的定量检测方法。先将环境样品中PA6和PA66在酸性水相环境中解聚,再分离回收其单体氨基己酸和己二酸,通过高效液相色谱串联质谱(LC-MS)定量检测反应后体系中氨基己酸和己二酸浓度与反应前样品中氨基己酸、己内酰胺和己二酸质量,再通过公式计算出原样品中PA6和PA66的质量浓度。
本发明采用如下技术方案:
本发明的针对不同环境样品中微量PA6和PA66的定量检测方法具体步骤如下:
(1)将0.1g样品置于反应釜中,加入20mL硫酸,并加热处理0.5h-2h;
(2)将(1)中反应后的酸性液体自然冷却后全部移出,与40mL超纯水混合,用5mol/L氢氧化钠溶液调节pH至2后,再用超纯水定容至80mL,取其中10mL通过SCX固相萃取小柱萃取回收氨基己酸,另取500μl与3mL色谱级乙酸乙酯混合萃取己二酸,涡旋30s,离心取上层清液并重复两次,使用氮吹仪将合并的上清液吹干后,加入1mL超纯水将样品复溶;
(3)使用高效液相色谱串联质谱分别测定(2)中回收的氨基己酸浓度和己二酸浓度,并测定已用40mL超纯水溶解的环境样品中原始氨基己酸、己内酰胺和己二酸的浓度;
(4)利用公式计算环境样品中PA6和PA66的浓度。
步骤(1)中,所述环境样品为室内灰尘、污泥、降尘、食品、沉积物和土壤。
步骤(1)中,反应釜反应温度条件为160℃-200℃,硫酸浓度为30%-45%。
步骤(4)中计算公式分别为
WPA6和WPA66分别为环境样品中PA6和PA66的质量百分浓度;
W氨基己酸1和W己二酸1分别为解聚后体系中氨基己酸和己二酸的质量浓度;
W氨基己酸0、W己内酰胺0和W己二酸0分别为解聚前体系中氨基己酸、己内酰胺和己二酸的质量浓度;
M1、M2和M3分别为氨基己酸与己内酰胺摩尔质量比、氨基己酸与PA6单体的摩尔质量比和己二酸与PA66单体的摩尔质量比;
V0和m0分别为反应液相体系的体积和样品原始质量。
本发明的积极效果如下:
此方法可普遍应用于室内灰尘、污泥、降尘、食品、沉积物和土壤等环境样品,应用广泛;能够定量检测到将环境样品中微量(最低可至0.1mg/kg)的PA6和PA66;在硫酸加热处理前无需任何特殊处理;使用加压、高温和40%硫酸液相的反应条件能够大大的减少反应时间,且保证解聚接近完全;利用解聚后单体的质量浓度通过物质之间的摩尔质量比计算样品中PA6和PA66质量百分浓度,定量准确。
具体实施方式
下面的实施例是对本发明的进一步详细描述。
实例1:灰尘样品中PA6和PA66的定量检测
取一份0.1g灰尘样品加入高温反应釜,加入20mL浓度为40%的硫酸,在180℃的温度下加热1h。将反应后混合液体自然冷却后全部移出,并定量至40mL。取10mL调节pH至2,且稀释至20mL,再从中取10mL使用SCX固相萃取小柱萃取PA6单体氨基己酸;再取500μL,加入3mL色谱级乙酸乙酯,涡旋30s后离心取上层清液,重复两次,使用氮吹仪吹干后加入1mL超纯水溶解,从而萃取回收PA66单体己二酸。使用高效液相色谱串联质谱分别定量测定体系中氨基己酸和己二酸浓度,再称取0.1g样品用40mL超纯水溶解测得初始氨基己酸、己内酰胺和己二酸的浓度,根据公式计算出PA6和PA66的含量为223.13mg/kg和115.73mg/kg。
Claims (6)
1.一种针对不同环境样品中微量PA6和PA66的定量检测方法,其特征在于,将环境样品直接在硫酸体系中进行酸化热解聚处理,使环境样品中的微量PA6和PA66解聚为氨基己酸和己二酸单体,通过测定解聚前后体系中功能单体氨基己酸、己内酰胺和己二酸的浓度差异,利用公式回溯计算环境样品中PA6和PA66的浓度,具体步骤如下:
(1)将0.1g环境样品置于反应釜中,加入20mL硫酸,并加热处理0.5h-2h;
(2)将(1)中反应后的酸性液体自然冷却后全部移出,与40mL超纯水混合,用5mol/L氢氧化钠溶液调节pH至2后,再用超纯水定容至80mL,取其中10mL通过SCX固相萃取小柱萃取回收氨基己酸,另取500μL与3mL色谱级乙酸乙酯混合涡旋30s,离心取上层清液并重复两次,使用氮吹仪将合并上清液吹干后,加入1mL超纯水复溶;(3)使用高效液相色谱串联质谱分别测定(2)中回收的氨基己酸浓度和己二酸浓度,并测定已用40mL超纯水溶解的环境样品中原始氨基己酸、己内酰胺和己二酸的浓度;(4)利用公式计算环境样品中PA6和PA66的原始浓度;
计算公式分别为
WPA6和WPA66分别为环境样品中PA6和PA66的质量百分浓度;
W氨基己酸1和W己二酸1分别为解聚后体系中氨基己酸和己二酸质量浓度;
W氨基己酸0、W己内酰胺0和W己二酸0分别为解聚前体系中氨基己酸、己内酰胺和己二酸的质量浓度;
M1、M2和M3分别为氨基己酸与己内酰胺摩尔质量比、氨基己酸与PA6单体的摩尔质量比和己二酸与PA66单体的摩尔质量比;
V0和m0分别为反应液相体系的体积和样品原始质量。
2.根据权利要求1所述一种针对不同环境样品中微量PA6和PA66的定量检测方法,其特征在于:所述环境样品为室内灰尘、污泥、降尘、食品、沉积物、土壤、生物组织和动物粪便。
3.根据权利要求1所述一种针对不同环境样品中微量PA6和PA66的定量检测方法,其特征在于:所述微量为最低质量百分浓度可至0.1mg/kg。
4.根据权利要求1所述一种针对不同环境样品中微量PA6和PA66的定量检测方法,其特征在于:所述环境样品在硫酸加热处理前无需任何特殊处理。
5.根据权利要求1所述一种针对不同环境样品中微量PA6和PA66的定量检测方法,其特征在于:所述硫酸浓度为30%-45%。
6.根据权利要求1所述一种针对不同环境样品中微量PA6和PA66的定量检测方法,其特征在于:所述反应釜反应温度条件为160℃-200℃。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910088486.1A CN111487331B (zh) | 2019-01-25 | 2019-01-25 | 一种针对环境样品中微量尼龙6和尼龙66的定量检测方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910088486.1A CN111487331B (zh) | 2019-01-25 | 2019-01-25 | 一种针对环境样品中微量尼龙6和尼龙66的定量检测方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111487331A CN111487331A (zh) | 2020-08-04 |
| CN111487331B true CN111487331B (zh) | 2022-07-12 |
Family
ID=71812310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910088486.1A Active CN111487331B (zh) | 2019-01-25 | 2019-01-25 | 一种针对环境样品中微量尼龙6和尼龙66的定量检测方法 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111487331B (zh) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119613281A (zh) * | 2024-12-06 | 2025-03-14 | 东华大学 | 一种含酰胺基聚合物的解聚再生方法 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2393545T3 (es) * | 2001-08-07 | 2012-12-26 | Pacific Engineering Corporation | Composición de resina de poliamida para elemento fusible y elemento fusible |
| CN1791322A (zh) * | 2005-10-18 | 2006-06-21 | 南开大学 | 一种兼具电磁屏蔽及雷达吸波功能的复合材料及制备方法 |
| EP2022811B1 (en) * | 2006-05-16 | 2019-01-02 | Mitsubishi Chemical Corporation | Polyamide resin |
| EP2270067B1 (en) * | 2008-03-12 | 2016-06-15 | Asahi Kasei Chemicals Corporation | Polyamide, polyamide composition and method for producing polyamide |
| EP2684867B1 (en) * | 2011-03-09 | 2019-01-02 | Mitsui Chemicals, Inc. | Pentamethylene diisocyanate, method for producing pentamethylene diisocyanate, polyisocyanate composition, polyurethane resin, and polyurea resin |
| CN104155295B (zh) * | 2014-08-30 | 2016-05-04 | 中国烟草总公司郑州烟草研究院 | 一种固相萃取净化-连续流动分析仪快速测定纸质包装材料中六价铬的方法 |
| CN108008029B (zh) * | 2017-11-13 | 2020-09-22 | 浙江省海洋水产研究所 | 一种海洋沉积物中邻苯二甲酸酯类环境激素的分散固相萃取-气相色谱-质谱检测方法 |
| CN108318613A (zh) * | 2018-01-11 | 2018-07-24 | 四川国测检测技术有限公司 | 一种环境样品中抗生素的检测方法 |
-
2019
- 2019-01-25 CN CN201910088486.1A patent/CN111487331B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111487331A (zh) | 2020-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Feng et al. | Extracellular polymeric substances extraction and recovery from anammox granules: Evaluation of methods and protocol development | |
| Lever | Identification of organics in Bayer liquor | |
| CN110554111A (zh) | 一种针对环境样品中微量聚乳酸微塑料的定量检测方法 | |
| JP5500067B2 (ja) | 糖鎖標識方法 | |
| CN111487331B (zh) | 一种针对环境样品中微量尼龙6和尼龙66的定量检测方法 | |
| Ren et al. | Choline derivative ionic liquids-based aqueous two-phase systems: Phase diagrams and partition of purine alkaloids | |
| CN103149167A (zh) | 检测牛奶及饮用水中四环素残留的方法 | |
| JP6834104B2 (ja) | ポリイミドフィルムのモノマー定量分析法 | |
| Minamisawa et al. | Determination of indium by graphite furnace atomic absorption spectrometry after coprecipitation with chitosan | |
| CN101865886A (zh) | 高效液相色谱串联质谱测定蜂胶中氯霉素残留量的方法 | |
| Llop et al. | Automated determination of aliphatic primary amines in wastewater by simultaneous derivatization and headspace solid-phase microextraction followed by gas chromatography–tandem mass spectrometry | |
| CN108732158A (zh) | 适用于检测农产品中三嗪类农药残留的MIPs-SERS检测方法 | |
| Sánchez-González et al. | Multi-walled carbon nanotubes—Solid phase extraction for isolating marine dissolved organic matter before characterization by size exclusion chromatography | |
| Gok et al. | Separation and preconcentration of La3+, Ce3+ and Y3+ using calix [4] resorcinarene impregnated on polymeric support | |
| CN101788464A (zh) | 一种溶析结晶过程中溶液浓度的在线检测方法及其专用装置 | |
| CN103245550B (zh) | 吡啶类离子液体双水相体系分离富集痕量邻苯二甲酸酯类的方法 | |
| CN106855504B (zh) | 一种快速测定硫酸根含量的方法 | |
| CN105441068A (zh) | 一种识别钴离子荧光探针及其合成方法和应用 | |
| CN107167443A (zh) | 一种利用紫外光谱仪检测pcb77的方法 | |
| CN108844996B (zh) | 一种低热值高含水率的工业废液热值分析方法及应用 | |
| CN111007194B (zh) | 一种利用离子色谱定量尼龙单体中钠离子含量的方法 | |
| JP2005134274A (ja) | 固体試料中のアルデヒド類の定量分析法 | |
| CN102565228B (zh) | 一种检测磺胺类药物残留的方法 | |
| CN102565230A (zh) | 一种聚异丁烯中游离氯离子的检测方法 | |
| CN110178025B (zh) | 氨基酸的来源判别方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |