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Method for determining total fluorine compound precursor substances in atmospheric particulate matter sampling filter membrane

A technology of atmospheric particulate matter and perfluorinated compounds, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of increasing the detection cost of a single sample, achieve the effects of shortening the elution time, good separation effect, and improving detection efficiency

Inactive Publication Date: 2019-08-16
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above method can realize the determination of perfluorinated compound precursors in fish and other aquatic products, but the main function of the pretreatment process of this method is to remove impurities such as fat and phospholipids in fish samples, and the sample purification uses Oasis PRiME HLB solid-phase extraction column , which increases the detection cost of a single sample, and is not suitable for the detection of perfluorinated compound precursors in large-scale processing of atmospheric particulate matter sampling filter membranes

Method used

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  • Method for determining total fluorine compound precursor substances in atmospheric particulate matter sampling filter membrane
  • Method for determining total fluorine compound precursor substances in atmospheric particulate matter sampling filter membrane
  • Method for determining total fluorine compound precursor substances in atmospheric particulate matter sampling filter membrane

Examples

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Embodiment 1

[0060] Example 1 Determination of perfluorinated compound precursor substances in atmospheric particulate matter sampling filter membrane

[0061] The method for determining the precursors of perfluorinated compounds in the atmospheric particulate matter sampling filter membrane comprises the following steps:

[0062] 1) Extraction of samples: dry the air sampling filter membrane to a constant weight and cut it into 1*1cm size with clean scissors, add methanol 15mL to it, and add appropriate amount of internal standard M2-4:2FTS, M2-6:2FTS , M2-8:2FTS, M8FOSA, d3-N-MeFOSAA and d5-N-EtFOSAA, vortex for 5 minutes, then turn to horizontal vibration for 15 minutes, and then ultrasonically extract for 1 hour; ultrasonic conditions are: ultrasonic power 700W, ultrasonic frequency 45KHZ; temperature Control at 40°C; after ultrasonic extraction, transfer the supernatant to a clean centrifuge tube, then add 15 mL of methanol and repeat the above shaking and ultrasonic extraction steps ...

Embodiment 2

[0091] Example 2 The recovery rate test of perfluorinated compound precursors in air sampling membrane samples

[0092]The blank air sampling filter membrane (quartz filter membrane) was calcined in a muffle furnace at 450°C for 6 hours, cooled to room temperature, and dried in a desiccator to constant weight for use. Atmospheric sampling filter (quartz filter) samples were collected from the roof of the Sun Yat-sen University School of Public Health.

[0093] Take three blank filter membranes, cut each into four parts with the same area, take two parts for each and cut them into 1*1cm size. Use clean tweezers to clamp six pieces of filter membrane fragments representing the three blank filter membranes into six polypropylene centrifuge tubes, and add 15 mL of methanol to them.

[0094] After the atmospheric sampling filter membrane sample is dried to a constant weight, take three samples and use clean scissors to cut each filter membrane into four parts with the same area, a...

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Abstract

The invention provides a method for determining total fluorine compound precursor substances in an atmospheric particulate matter sampling filter membrane; the method comprises the following steps of1) extracting a sample: carrying out ultrasonic extraction on the atmospheric particulate matter sampling filter membrane, and collecting to obtain an extracting solution; 2) purification of the sample: carrying out purifying, concentrating and purifying on the extracting solution obtained in the step 1) to obtain a sample detection solution; and 3) determination of the sample: detecting the sample detection solution obtained in the step 2) by adopting an ultra-high performance liquid phase chromatography-triple quadrupole series mass spectrometer, and obtaining the content of the total fluorine compound precursor substance by adopting an internal standard method. The invention belongs to the technical field of environmental monitoring, and by virtue of the provided measurement method, full extraction and measurement of six kinds of total fluorine compound precursor substances, such as 4:2FTS and the like in the atmospheric particulate matter sampling filter membrane can be realized, the separation effect is good, and the detection efficiency is improved; and the method has the advantages of being accurate in measurement result, high in repeatability, high in sensitivity, high in recovery rate, low in detection limit, high in substrate interference resistance and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, and in particular relates to a method for determining precursor substances of perfluorinated compounds in atmospheric particle sampling filter membranes. Background technique [0002] Perfluoroalkyl Substances (PFASs) are widely used in the fields of industrial production and daily consumption because of their special hydrophobicity, oleophobicity, surface activity, thermal stability and other physical and chemical properties. Relevant studies have shown that perfluorinated compounds have multiple organ toxicity and suspected carcinogenicity, and are a new type of persistent organic pollutants. Among them, perfluorooctanesulfonate (PFOS) and its salts and perfluorooctanesulfonyl fluoride are included in the Stockholm Convention as new persistent organic pollutants, and their use is restricted worldwide. [0003] PFASs precursors have been proven to be the main source of PFASs po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06
Inventor 董光辉曾晓雯胡立文刘珊许姝丽
Owner SUN YAT SEN UNIV
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