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Method for detecting organic chlorine compounds in leather

A detection method and organochlorine technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of no detection methods, detection standards, and no detection reports, etc., and achieve low cost, strong operability, and good reproducibility Effect

Inactive Publication Date: 2017-09-05
COMPREHENSIVE TECH SERVICE CENT OF QUANZHOU ENTRY EXIT INSPECTION & QUARANTINE BUREAU OF P R C +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] At present, there are no relevant detection reports at home and abroad for the detection of organochlorine compound residues in leather, and there are no corresponding detection methods and detection standards

Method used

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  • Method for detecting organic chlorine compounds in leather
  • Method for detecting organic chlorine compounds in leather
  • Method for detecting organic chlorine compounds in leather

Examples

Experimental program
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Embodiment 1

[0080] 1) Preparation of sample solution: Take a leather sample, cut it into pieces below 5mm×5mm, mix well, weigh 2.0g (accurate to 0.01g) sample, put it in a 50mL stoppered polypropylene centrifuge tube, add 20mL n-hexane-ethyl acetate (1 / 1, v / v) solution, vortexed for 10 minutes, assisted ultrasonic extraction in an ultrasonic generator for 20 minutes, centrifuged at 5000r / min for 5 minutes, and the supernatant was transferred to a chicken heart bottle . The residue was then ultrasonically extracted with 20 mL of n-hexane-ethyl acetate (1 / 1, v / v) solution for 10 min, centrifuged at 5000 r / min for 5 min, and the combined supernatant was transferred to a chicken heart bottle, and the combined extract was placed in Concentrate at 40°C, and use 5 mL of acetonitrile-toluene (3 / 1, v / v) solution to dissolve the residue as an extract.

[0081] First use 5mL acetonitrile-toluene (3 / 1, v / v) solution to pre-wash the Carb (graphitized carbon black) solid-phase extraction column, injec...

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Abstract

The invention provides a method for detecting organic chlorine compounds in leather. The method includes carrying out ultrasonic extraction by the aid of normal hexane-ethyl acetate mixed liquid; carrying out purification by the aid of solid-phase extraction columns; concentrating eluent to a defined volume, then separating the eluent by the aid of DB-1701 quartz capillary columns; carrying out analysis by the aid of gas chromatography-mass spectrometry combined instruments; carrying out qualitative treatment in full-scanning modes; carrying out quantification in selective ion modes. The method has the advantages that the linear ranges of the 19 organic chlorine compounds detected by the aid of the method are 10-1000 ng / mL, the correlation coefficients R2 are higher than or equal to 0.9981, the detection limit is 0.01-0.1 mg / kg, the recycling rate is 74.1%-116.4%, and the RSD (relative standard deviation) is lower than or equal to 7.3% (n=6); the method is simple, convenient, speedy, accurate, stable and reliable and is applicable to simultaneously detecting the 19 organic chlorine compounds in the leather, and detection requirements on various technical indexes can be met.

Description

technical field [0001] The invention relates to the technical field of substance detection, in particular to a method for detecting organochlorine compounds in leather. Background technique [0002] Leather is a durable, soft material made from animal hides and skins tanned, such as cowhide, pigskin, sheepskin, horse, donkey and kangaroo skin. In order to obtain high-quality leather, people may use bactericidal and insecticidal compounds (ie, organochlorine compounds) at different stages, such as using insecticidal compounds to expel parasites during animal growth, and to prevent raw hides from decay while using a fungicidal preservative. Compounds such as persistent organic pollutants (POPs) can migrate from animals' food chains and concentrate in leather. So the compounds in the leather may originate from the livestock breeding process, the animal's food chain migration, storage, transportation or processing. [0003] Residues of organochlorine compounds are not easy to...

Claims

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Application Information

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IPC IPC(8): G01N30/88G01N30/06
CPCG01N30/06G01N30/88G01N2030/062G01N2030/884
Inventor 韦航邹强李军法刘军红戴金兰荣杰峰黄伙水
Owner COMPREHENSIVE TECH SERVICE CENT OF QUANZHOU ENTRY EXIT INSPECTION & QUARANTINE BUREAU OF P R C
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