Method for detecting medium-chain chlorinated paraffin in leather

A detection method and technology for chlorinated paraffin, applied in the field of analysis and detection, can solve the problems of medium chain chlorinated paraffin analysis interference, difficult separation, identification and determination of MCCPs, etc., and achieve the effect of improving accuracy

Active Publication Date: 2020-04-21
尤志勇
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since the position of chlorine atoms and the chlorination ratio are ever-changing, the mass of MCCPs and SCCPs overlaps, which makes short-chain chlorinated paraffins interfere with the analysis of medium-chain chlorinated paraffins, making it difficult to separate, identify and measure MCCPs

Method used

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  • Method for detecting medium-chain chlorinated paraffin in leather
  • Method for detecting medium-chain chlorinated paraffin in leather
  • Method for detecting medium-chain chlorinated paraffin in leather

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Embodiment 1

[0040] (1) Instrument

[0041] Agilent 7890A-5975C Gas Chromatography Mass Spectrometry (GC-ECNI-MSD); KQ-500E CNC Ultrasonic Cleaner, Kunshan Ultrasonic Instrument Company; Polytetrafluoroethylene organic filter membrane, pore size 0.45 μm, Shanghai Xingye Purification Material Factory ; Tubular hard glass extractor, 60mL, with screw cap (with Teflon gasket).

[0042] (2) Reagents

[0043] Concentrated sulfuric acid was analytically pure; dichloromethane, acetone, n-hexane, and methanol were all chromatographically pure and purchased from M-TEDIA, USA; water was ultrapure water.

[0044] Medium-chain chlorinated paraffin standard solution (chlorine content is respectively 52% and 57%), 100mg / L, 10mL, solvent is cyclohexane, German Dr.Ehrenstorfer company; Short-chain chlorinated paraffin standard solution (chlorine content is respectively 51.5%) %, 55.5% and 63%), 100mg / L, 10mL, solvent is cyclohexane, German Dr.Ehrenstorfer company.

[0045] MCCPs two-component mixed stoc...

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Abstract

The invention relates to the technical field of analysis and detection, and provides a method for detecting medium-chain chlorinated paraffin in leather. The method comprises the following steps of extracting a leather sample by using an extraction solvent, purifying the extracting solution by using concentrated sulfuric acid, and carrying out GC-ECNI-MSD test on the obtained to-be-detected solution. Through extraction and purification, the influence of interfering substances in the leather sample on the detection result is removed, and the precision of the detection result is improved; the method can effectively separate short-chain chlorinated paraffin from the medium-chain chlorinated paraffin, and achieve the purpose of precise qualitative and quantitative analysis. Embodiment resultsshow that a linear correlation coefficient of a standard curve is greater than or equal to 0.9970 when the concentration is 5-80 mg / L, the adding standard recovery rate of a blank sample is 75-110%, the relative standard deviation is within 8.0%, the detection limit is lower than 50 mg / kg, and the test requirements of the medium-chain chlorinated paraffin in the leather sample can be met.

Description

technical field [0001] The invention relates to the technical field of analysis and detection, in particular to a method for detecting medium-chain chlorinated paraffins in leather. Background technique [0002] Chlorinated paraffin is a chlorinated derivative of paraffin, a complex mixture containing thousands of isomers and diastereomers of chlorinated alkanes, the chlorine content varies between 30% and 70%, and it has low volatility It can be used as a flame retardant and an auxiliary plasticizer for PVC, and is widely used in the production of leather, textiles, cables, hoses, rubber and other products. Used as an additive for paint, plastic track, lubricating oil, etc. According to the length of the carbon chain, chlorinated paraffins are divided into short-chain chlorinated paraffins SCCPs (C 10 -C 13 ), medium chain chlorinated paraffins (C 14 -C 17 ) MCCPs and long-chain chlorinated paraffins LCCPs (C 18 -C 38 ). Among them, short-chain chlorinated paraffins...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/86
CPCG01N30/02G01N30/06G01N30/8679G01N2030/062
Inventor尤志勇毛树禄邹强翁城武李小晶俞凌云李建勇
Owner尤志勇