Method for processing cucumber sample containing ametoctradin before measurement

A technology of octopazoxim and a processing method, which is applied in the field of processing before cucumber sample measurement, can solve problems such as no public reports, and achieves the effects of high stability and reliability and fast measurement speed

Inactive Publication Date: 2011-07-20
CENT LAB TIANJIN ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The method described in this article is a method independently developed by our unit. The

Method used

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  • Method for processing cucumber sample containing ametoctradin before measurement
  • Method for processing cucumber sample containing ametoctradin before measurement
  • Method for processing cucumber sample containing ametoctradin before measurement

Examples

Experimental program
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Embodiment 1

[0032] Weigh 20.0g of cucumber sample, add 10ml of water, 40ml of acetonitrile, shake and extract for 20min, filter into a separatory funnel, add 5g of sodium chloride, shake for 3min, let stand for 10min, take the upper organic phase, dry it with anhydrous sodium sulfate, concentrate To dryness, dilute to volume with methanol and filter the membrane to be tested, and determine by ultra-high performance liquid chromatography-mass spectrometry / mass spectrometry.

Embodiment 2

[0034] Weigh 20.0g of cucumber sample, add 20ml of water, 60ml of acetonitrile, shake and extract for 30min, filter into a separatory funnel, add 8g of sodium chloride, shake for 5min, let stand for 15min, take the upper organic phase, dry it with anhydrous sodium sulfate, concentrate To dryness, dilute to volume with methanol and filter the membrane to be tested, and determine by ultra-high performance liquid chromatography-mass spectrometry / mass spectrometry.

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Abstract

The invention discloses a method for processing a cucumber sample containing ametoctradin residue before measurement, which comprises the following steps of: weighing 20.0g of cucumber sample; adding 10-20ml of water and 40-60ml of acetonitrile; vibrating and extracting for 20-30 minutes; filtering into a separating funnel; adding 5-8g of sodium chloride and vibrating for 3-5 minutes; after standing for 10-15minutes, extracting an upper organic phase, and drying and concentrating till dryness by anhydrous sodium sulfate; carrying capacity determination with methanol and filtering with a filtering member for measurement; and measuring by adopting a super high performance liquid phase-mass spectrum/mass spectrometer method. The method for processing a residual sample before measurement, disclosed by the invention, has the characteristics of high detecting speed, simple equipment, low detecting cost and high accuracy, stability and reliability.

Description

Technical field: [0001] The invention belongs to the technical field of measuring pesticide residues, and relates to a method for measuring pesticide residues in agricultural products and vegetables, in particular to a method for treating cucumber samples containing oxamethoxam before measuring. Background technique: [0002] Pesticide residues refer to the phenomenon that a part of pesticides directly or indirectly remain in grains, vegetables, fruits, livestock products, aquatic products, soil and water after pesticides are applied in agricultural production. The problem of pesticide residues arises with the mass production and widespread use of pesticides. Some of the currently used pesticides can be biodegraded into harmless substances in a relatively short period of time, while some organochlorine pesticides are difficult to degrade and are pesticides with strong residues. Vegetable pesticide residues exceeding the standard will directly endanger the nervous system, li...

Claims

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Application Information

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IPC IPC(8): G01N30/06
Inventor 李辉刘磊邵辉李娜张玉婷郭永泽
Owner CENT LAB TIANJIN ACADEMY OF AGRI SCI
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