Method for measuring perfluorinated compounds in textile, clad layers, coatings, liquid and powder samples

A technology of perfluorinated compounds and textiles, applied in the field of analytical chemistry, can solve problems such as health hazards, and achieve the effect of rapid determination methods

Inactive Publication Date: 2016-01-13
SGS STANDARD TECHNICAL SERVICES SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] As a new generation of persistent organic pollutants (POPs), perfluorinated compounds have long-term residue, bioaccumulation, semi-volatility and high toxicity, which have brought serious harm to human health.

Method used

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  • Method for measuring perfluorinated compounds in textile, clad layers, coatings, liquid and powder samples
  • Method for measuring perfluorinated compounds in textile, clad layers, coatings, liquid and powder samples
  • Method for measuring perfluorinated compounds in textile, clad layers, coatings, liquid and powder samples

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1: Determination of the content of perfluorinated compounds in the gray fabric-planimetric method

[0061] 1. Sample preparation:

[0062] Cut the 15cm×15cm gray fabric into 5mm×5mm, put it into a 100mL blue cap bottle, add 50μL of 1mg / L internal standard solution (1mg / LMPFOA and 1mg / LMPFOS mixed solution), then add 50mL of methanol, and ultrasonically extract the sample solution. The temperature of the water bath ultrasonic is 60±5°C, and the time is 120±5 minutes. After the methanol extraction solution was cooled, it was transferred to a 250mL flat-bottomed flask and concentrated to nearly dryness with a rotary evaporator, then the volume was adjusted to 5mL with methanol, filtered through a 0.22μm polytetrafluoroethylene membrane, and then analyzed on the machine.

[0063] 2. Set the instrument parameters:

[0064] 1) Conditions of liquid chromatography mass spectrometer

[0065] Liquid chromatography conditions:

[0066] Chromatographic column: BEH-C1...

Embodiment 2

[0099] Embodiment 2: the determination of the content of perfluorinated compounds in the yellow coating or coated metal sheet-planimetric method

[0100] 1. Sample preparation:

[0101] Cut the 15cm×15cm yellow plated or coated metal sheet into 5mm×5mm, put it into a 100mL blue cap bottle, add 50μL of 1mg / L internal standard solution (mixed solution of 1mg / LMPFOA and 1mg / LMPFOS), and then add 50mL of methanol Ultrasonic extraction of the sample solution, the temperature of the water bath ultrasonic is 60±5°C, and the time is 120±5 minutes. After the methanol extraction solution was cooled, it was transferred to a 250mL flat-bottomed flask and concentrated to nearly dryness with a rotary evaporator, then the volume was adjusted to 5mL with methanol, filtered through a 0.22μm polytetrafluoroethylene filter membrane, and then analyzed on the machine.

[0102] 2. Set the instrument parameters:

[0103] 1) Conditions of liquid chromatography mass spectrometer

[0104] Liquid chrom...

Embodiment 3

[0138] Embodiment 3: Determination of the content of perfluorinated compounds in the gray fabric-gravimetric method

[0139] 1. Sample preparation:

[0140] Weigh 1.0g±0.05g of gray fabric, put it into a 100mL bottle with a blue cap, add 50μL of 1mg / L internal standard solution (mixed solution of 1mg / LMPFOA and 1mg / LMPFOS), and then add 40mL of methanol (for samples that cannot be completely submerged by the solvent) , add additional methanol to ensure that the sample is completely submerged) ultrasonically extract the sample solution, the temperature of the water bath ultrasonic is 60±5°C, and the time is 120±5 minutes. After the methanol extraction solution was cooled, the extract was transferred to a 250mL flat-bottomed flask, concentrated by rotary evaporation to nearly dryness, and the volume was adjusted to 5mL with methanol, filtered through a 0.22μm polytetrafluoroethylene filter membrane, and then analyzed on the machine.

[0141] 2. Set the instrument parameters:

...

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Abstract

The invention relates to a method for measuring perfluorinated compounds in textile, clad layers, coatings, liquid and powder samples. The method comprises the measuring steps that firstly, a sample is cut according to a certain dimension in an area method or a sample of a proper amount is weighed in a weight method, an organic solvent is added for ultrasonic extraction, and the mixture is cooled to the room temperature and then filtered to be fed into a machine for analysis; secondly, the quantity of perfluorinated compounds in the extracted solution obtained in the first step is measured through a liquid chromatogram and mass spectrum combined instrument; thirdly, if a liquid chromatogram and mass spectrum selected ion scanning result shows that perfluorinated compounds seem to be contained in the sample, a spectrogram of the sample is compared with that of a standard substance, if the spectrogram of the sample is matched with that of the standard substance, the extracted solution obtained in the first step is measured through a liquid chromatogram tandem mass spectrum combined instrument, characteristic ions of the sample are compared with those of the standard substance to confirm whether perfluorinated compounds are contained in the sample or not, and the content of perfluorinated compounds in the sample is calculated. The measuring method is fast and simple, and perfluorinated compounds in various materials can be accurately measured.

Description

[technical field] [0001] The invention belongs to the technical field of analytical chemistry, in particular to a method for measuring perfluorinated compounds in textiles, coatings, coatings, liquids and powder samples, including planimetric and gravimetric methods. [Background technique] [0002] Perfluorinated compounds are a class of elemental organic compounds in which the hydrogen atoms connected to carbon atoms in the molecule of organic compounds are replaced by fluorine. Since fluorine is the most electronegative element, the chemical properties of perfluorinated compounds are extremely stable and can withstand high temperature heating, light, chemical action, microbial action and metabolism of higher vertebrates. They are mainly used in chemical industry, textile, coating, leather, Synthetic detergents, cookware manufacturing (such as non-stick pans), paper food packaging materials and other fields. In addition, perfluorinated compounds have hydrophobic and oleoph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
Inventor 王卫沈建萍马永存周燕杨占君
Owner SGS STANDARD TECHNICAL SERVICES SHANGHAI CO LTD
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