A kind of detection method of organophosphorus flame retardant in grain

A detection method, organophosphorus technology, applied in the field of environmental analytical chemistry, can solve problems such as OPFRs measurement methods that have not been reported yet, and achieve the effects of saving time and organic solvent consumption, good recovery rate, and short time consumption

Active Publication Date: 2021-06-15
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no method for the determination of OPFRs in grains has been reported yet.

Method used

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  • A kind of detection method of organophosphorus flame retardant in grain
  • A kind of detection method of organophosphorus flame retardant in grain
  • A kind of detection method of organophosphorus flame retardant in grain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A rapid detection method for various organophosphorus flame retardants in rice in Suzhou City, including the following steps:

[0047] [S001] Mature ears of grain are cut with stainless steel knives or scissors, wrapped in foil, placed in an incubator with ice cubes, and transported back to the laboratory. Paddy is washed with pure water, and after drying, put into freezer and carry out freeze-drying, then use rice milling machine to dehull, the brown rice after the dehulling is ground into uniform powder, sieved to obtain sample (i.e. sample to be tested), Wrap in foil and set aside.

[0048] [S002] Accurately weigh 1.0 g of the sample, add 5.0 g of diatomaceous earth, mix it evenly with the sample, put it into a 34 ml stainless steel extraction pool, cover it, and put it into a fast solvent extraction apparatus.

[0049] [S003] Add n-hexane-acetone (1:1, v / v) mixed solution in the mixed sample of sample and diatomaceous earth as extraction agent, set the static extra...

Embodiment 2

[0054] It is basically the same as in Example 1, except that in [S003], the extraction temperature of the ASE accelerated solvent extractor is set to 90°C.

Embodiment 3

[0056] It is basically the same as in Example 1, except that in [S003], the extraction temperature of the ASE accelerated solvent extractor is set to 110°C.

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Abstract

The invention relates to a method for detecting organic phosphorus flame retardants in grains, which uses a fast solvent extraction method to extract the target substance in a sample to be tested; uses a solid phase extraction method to purify and enrich, and then uses a first eluent to carry out Elution, collect the eluent as eluent 1, then use the second eluent for elution, collect the eluent as eluent 2, wherein the polarity of the first eluent is less than that of the The polarity of the second eluent; adopt gas chromatography-tandem mass spectrometer to analyze and measure. The invention has a high recovery rate of the target object, a small relative standard deviation, can meet the requirements of trace analysis, has the advantages of simple operation, short time consumption, batch processing, low solvent consumption, rapid qualitative and quantitative analysis at the same time, and high High precision and accuracy, can obtain good recovery rate, meet the detection limit requirements, and provide reliable and rapid detection technology for human dietary exposure and food safety and quality monitoring.

Description

technical field [0001] The invention belongs to the field of environmental analytical chemistry, and in particular relates to a method for detecting organic phosphorus flame retardants in grains. Background technique [0002] Organophosphate flame retardants (organophosphate flame retardants, OPFRs) have been produced and used in large quantities due to their advantages of high-efficiency flame retardancy and plasticization, and have become the second largest category of flame retardants in the Chinese market. Since OPFRs are added to products in a non-chemical bonding manner, OPFRs are easily released to the environment during production and use. In recent years, there have been many studies on OPFRs pollution in environmental matrices in various countries or regions in the world, especially soil, water, indoor and outdoor dust or particulate matter, etc. are all polluted by OPFRs to varying degrees. OPFRs have high lipophilicity and hydrophobicity, and can biomagnify alon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 王俊霞顾海东韩艳娜张占恩闫广礼张磊杨光冠高仕谦刘婷婷倪敏马一飞刘珊珊刘缘廖方新李涵颖杨静文邹旭晴王婷刘一帆
Owner SUZHOU UNIV OF SCI & TECH
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