Pretreatment method for detection of acetamiprid in dry fruits and vegetable

A technology for acetamiprid and dried fruits in vegetables, applied in the field of analytical chemistry, can solve the problems of long processing time, low extraction efficiency and the like, and achieve the effects of saving analysis time and simplifying separation steps

Inactive Publication Date: 2012-08-01
FUZHOU UNIV
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  • Abstract
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Problems solved by technology

The key disadvantages of this type of pretreatment technology are low extraction efficiency and long processing time

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  • Pretreatment method for detection of acetamiprid in dry fruits and vegetable

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Embodiment 1

[0022] The following embodiments take the extraction of acetamiprid from wolfberry as an example, and describe the specific working principle of the present invention in conjunction with the accompanying drawings:

[0023] The specific operation flow of the pretreatment method for detecting acetamiprid in dried fruits and vegetables of the present invention is as follows figure 1 Shown. Including sample immersion, rotary evaporation, vortex elution and other operations.

[0024] Specific steps:

[0025] (1) Weigh 1.00 g (accurate to 0.01 g) of wolfberry in a 50 mL centrifuge tube;

[0026] (2) Add 10 ml of secondary water to the above centrifuge tube, soak for 5 minutes, then add 20 ml of acetonitrile, and homogenize for 30 seconds;

[0027] (3) Add 5 grams of sodium chloride and homogenize for 20 seconds;

[0028] (4) The centrifuge tube is capped and shaken for 1 minute, and centrifuged at 3800 rpm for 5 minutes;

[0029] (5) Accurately pipette 8.0 ml of supernatant liquid into a chick...

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Abstract

The invention provides a pretreatment method for detection of acetamiprid in dry fruits and vegetable. The method comprises the operations of weighting the sample to be detected, soaking, performing rotary evaporation and vortex elution, centrifuging, filtering and the like. The used instrument comprises a constant-temperature oscillator, a reduced-pressure rotary evaporator, a high-speed freezing centrifuge and the like. The sample solution prepared by the pretreatment method can be directly detected by liquid chromatography-mass spectrography. Compared with the traditional method, the pretreatment method has the advantages of being simple and effective in operation, low in cost, good in repeatability and the like, has very strong operability and significant economic benefits, and is potentially to be popularized and applied on a large scale in the industries of environmental protection, commercial examination and entry-exit inspection and quarantine and the like.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, and more specifically relates to a pretreatment method for detecting acetamiprid in dried fruits and vegetables. Background technique [0002] Acetamiprid (Acetamiprid) is a nitromethylene heterocyclic compound, is a new type of insecticide, developed and commercialized by Nippon Soda Co., Ltd. in 1996, and is the first insecticide after imidacloprid and nitenpyram. Three neonicotinoid insecticides. Acting on the nicotinic acetylcholine receptors at the synaptic site of the insect nervous system, it interferes with the stimulation conduction of the insect nervous system, causing the blockage of the nervous system pathway, resulting in the accumulation of the neurotransmitter acetylcholine at the synaptic site, leading to paralysis and eventually death of the insect. In addition, acetamiprid has little lethality to natural enemies of pests, low toxicity to fish, and little impact on bees. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06
Inventor 邱彬郭隆华林振宇陈国南
Owner FUZHOU UNIV
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