Method for measuring residues of seven pesticides in wool fat by liquid chromatography-tandem mass spectrometry

A technology of pesticide residues and liquid chromatography, which is applied in the field of liquid chromatography tandem mass spectrometry to determine seven kinds of pesticide residues in lanolin, can solve the problems of endangering human physical and mental health, achieve less solvent consumption, fast and accurate detection, strong retention effect

Active Publication Date: 2013-09-11
宁波中盛产品检测有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Therefore, if the residues of the above seven pesticides in lanolin are too high, they will endanger the physical and mental health of the human body....

Method used

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  • Method for measuring residues of seven pesticides in wool fat by liquid chromatography-tandem mass spectrometry
  • Method for measuring residues of seven pesticides in wool fat by liquid chromatography-tandem mass spectrometry
  • Method for measuring residues of seven pesticides in wool fat by liquid chromatography-tandem mass spectrometry

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Embodiment 1

[0033] 1. Instruments and reagents

[0034] 1.1 Main instruments and equipment

[0035] Liquid chromatography tandem mass spectrometer (LC-MS / MS) (Thermo Finnigan TSQ Quantum AM, USA);

[0036] Desktop high-speed refrigerated centrifuge SIGMA-3 K (SIGMA company);

[0037] Vortex mixer QL-901 (Qi Linbeier Instrument Manufacturing Co.);

[0038] Solid phase extraction apparatus (SUPELCO company);

[0039] Nitrogen blowing instrument N-EVAPTM;

[0040] Ultrasonic cleaner (50 HZ);

[0041] SPE column: Sep-Pak Vac C18 column (100 mg), PSA column (100 mg) (waters company, USA)

[0042] 1.2 Standard samples and reagents

[0043] Cyromazine, dexinil, diflubenzuron, triflumectin, rotenone, abamectin, and ivermectin were purchased from Dr. Ehrenstorfer Company, purity: ≧99.0%;

[0044] Acetonitrile, n-hexane, methanol, formic acid, and ammonium acetate were HPLC grade (Tedia Company), and the experimental water was ultrapure water.

[0045] 2. Detection method

[0046] 2.1 Sample...

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Abstract

The invention discloses a method for measuring residues of seven pesticides in wool fat by liquid chromatography-tandem mass spectrometry, and belongs to a chemical detection method. A liquid-liquid extraction frozen degreasing method is used as pretreatment; and the pesticide residues in the wool fat are detected and analyzed by the liquid chromatography-tandem mass spectrometry. According to the detection method disclosed by the invention, a wool fat sample extract solution is not required to be concentrated and can be measured in a machine only after being purified, so that the detection is quick and accurate, and the sensitivity is higher; the using amount of solvents is small, the extraction efficiency is high, grease can be completely removed, and the target retaining capacity is high; the residues of seven pesticides, such as cyromazine, dicyclanil, diflubenzuron, triflumuron, rotenone, abamectin and ivermectin can be detected at the same time; the target response signal is strong; the average recycling rates are 66.77-105.48 percent respectively; the relative standard deflection RSD is 1.38-8.09 percent; and the method has certain actual application and innovative signification.

Description

technical field [0001] The invention relates to a chemical detection method for measuring pesticide residues in lanolin, in particular to a method for measuring seven kinds of pesticide residues in lanolin by liquid chromatography tandem mass spectrometry. Background technique [0002] Lanolin is a natural substance secreted by the sebaceous glands of sheep. It can be extracted from wool. Its main components are esters produced by sterols, fatty alcohols and triterpene alcohols, and about the same amount of fatty acids. In order to drive away flies and kill lice, it is often necessary to spray pesticides on wool, so there will also be a certain amount of pesticide residues in the produced lanolin, such as cyromazine, dexinil, diflubenzuron, triflumuron, rotenone, Abamectin, ivermectin residue, etc. [0003] Cyromazine, also known as cyromazine, is a triazine insect growth regulator, which has an excellent inhibitory effect on the development of Diptera and some Coleoptera i...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
Inventor 樊苑牧俞雪钧顾晓俊陈树兵贺小雨
Owner 宁波中盛产品检测有限公司
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