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Quantitative determination method for residual quantity of imazapic in peanut kernels

A technology for the quantitative determination of imazethapyr, which is applied in the field of pesticide residue analysis and detection, and achieves the effects of accurate results, simple operation and strong specificity

Inactive Publication Date: 2019-05-10
黄志勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the present technology, there is no method for the quantitative determination of methazepam residues in peanut kernels by high performance liquid chromatography.

Method used

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  • Quantitative determination method for residual quantity of imazapic in peanut kernels
  • Quantitative determination method for residual quantity of imazapic in peanut kernels
  • Quantitative determination method for residual quantity of imazapic in peanut kernels

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Embodiment Construction

[0022] The content of the present invention is implemented and explained in the following specific ways.

[0023] Instruments and reagents:

[0024] Instrument: High performance liquid chromatography: Shimadzu LC-20A SPD-20A; Chromatographic column: Thermo C18 column (250mm×4.6mm, 5μm); small high-speed pulverizer (Yongkang Tianqi Shengshi Industry and Trade Co., Ltd.); CP225D Electronic balance (Sartorius, Germany;) TG-16 desktop high-speed centrifuge (Sichuan Shuke Instrument Co., Ltd.); Machine (Sichuan Youpu Ultrapure Technology Co., Ltd.); multi-parameter tester (Mettler-Toledo International Trade (Shanghai) Co., Ltd.); EV331 rotary evaporator (Labor Tech Co., Ltd.).

[0025] Reference substance: methazepam (98.5%) (Germany Dr. Ehrenstorfer GmbH company).

[0026] Test product: peanut kernels (purchased at random in supermarkets).

[0027] Reagents: chromatographically pure methanol, acetonitrile (Beijing Beilingwei Technology Co., Ltd.); analytically pure anhydrous so...

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Abstract

The invention discloses a quantitative determination method for residual quantity of imazapic in peanut kernels. The method comprises the following specific steps: using octadecyl silane bonded silicagel as a chromatographic column of filler; taking mixed solution of a component A acetonitrile and a component B, namely mixed solution of 0.02mol / L monopotassium phosphate and 0.1% triethylamine (pHvalue is regulated to be 3.0 with phosphoric acid solution) at a volume ratio of 25:75 as a mobile phase; determining detection wavelength to be 280nm; respectively preparing imazapic reference solution and peanut kernel test solution, respectively precisely sucking 5[mu]L of the two kinds of solution and injecting into a liquid phase chromatographic instrument, and recording a chromatogram map;and respectively calculating residual quantities of imazapic in samples by virtue of peak areas according to an external standard method.

Description

technical field [0001] The invention belongs to the field of analysis and detection of pesticide residues, in particular to a method for quantitative determination of methazepam residues in peanut kernels. Background technique [0002] Imazapic (imazapic) is an imidazolinone herbicide dedicated to peanut fields (see: Yu Jianlei, Song Guochun, Li Ruijuan, etc., "Residue dynamics of imazapic and its metabolites in peanuts and soil" , Journal of Agro-Environmental Sciences, 2006, 25 (Supplement), 260). GB 2763-2016 "National Food Safety Standard Maximum Residue Limits of Pesticides in Food" stipulates that the residue limit of methazepam in peanut kernels is 0.1mg / kg (see: National Standardization Management Committee, "GB2763-2016 National Food Safety Standard Maximum Residue Limits of Pesticides in Food", Beijing: China Standard Press, 2016). [0003] However, at present, there is no standard method specifically for the quantitative detection of methazapyr pesticide residue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06G01N30/02
Inventor 黄志勇
Owner 黄志勇
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