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Method for detecting organochlorine pesticide residue in soil

A technology for pesticide residues and organochlorine, which is used in measuring devices, instruments, scientific instruments, etc., can solve the problem of high measured values, and achieve the effects of improving accuracy, simple operation and good purification effect.

Inactive Publication Date: 2012-08-15
TOBACCO RES INST OF HUBEI PROVINCE
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  • Abstract
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Problems solved by technology

The blank matrix spiked recovery rate of some pesticides may be several times higher than the theoretical value, resulting in a significantly higher measured value than the actual value, such as p,p'-DDT, endrin, methoxychlor, o,p'-DDT Wait

Method used

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  • Method for detecting organochlorine pesticide residue in soil
  • Method for detecting organochlorine pesticide residue in soil
  • Method for detecting organochlorine pesticide residue in soil

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Embodiment Construction

[0014] The technical solutions in the present invention will be clearly and completely described below in conjunction with specific embodiments.

[0015] The detection method of the present invention involves 21 kinds of organochlorine pesticides, which are respectively: o,p'-DDT, o,p'-DDI, o,p',-DDD, p,p'-DDT, p, p'-Dididi, p,p'-Didi, methoxychlor, A-666, B-666, C-666, D-666, Heptachlor , Heptachlor epoxy, α-endosulfan, β-endosulfan, aldrin, cis-chlordane, trans-chlordane, dieldrin, hexachlorobenzene, endrin. Detection method of the present invention adopts external standard calibration curve method quantitatively, specifically comprises the following steps:

[0016] 1) Configuration of matrix mixed standard working solution: Take a soil sample that does not contain organochlorine pesticides according to the sample pretreatment method to prepare a blank matrix solution, and use this blank matrix solution to prepare a matrix containing at least three concentrations of the 21 ...

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Abstract

The invention provides a method for detecting an organochlorine pesticide residue in soil, which adopts a blank matrix without pesticides to match a standard solution for calibration, thus prevents a measured value from being much higher than an actual value for some organochlorine pesticides due to matrix effect, and improves the detection precision; The detection method of the invention adopts Florisil and anhydrous sodium sulfate for the purification of soil extract, and is simple in operation and good in purification effect; in addition, the invention optimizes gas chromatography conditions, can detect residues of as many as 21 organochlorine pesticides simultaneously, and accords with current development trend for organochlorine pesticide residue detection in soil.

Description

technical field [0001] The invention relates to the technical field of trace analysis, in particular to a method for detecting residual organochlorine pesticides in soil. Background technique [0002] Organochlorine pesticides (OCPs) mainly include HCH and DDT (DDT), which are broad-spectrum insecticides, neurotoxicants and parenchymal organ toxicants, and can cause cancer. It has a long residual period in the soil and is easy to accumulate in large quantities in organisms and water sediments. Nine of the first 12 persistent organic pollutants (POPs) controlled in the 2001 Stockholm Convention on Persistent Organic Pollutants were organochlorine pesticides, including DDTs, chlordane, dieldrin and hexachlorobenzene, etc. Residues of organochlorine pesticides are often detected in tobacco leaves, because tobacco leaves will accumulate organochlorine pesticides in the soil during the growth process. Therefore, accurate determination of organochlorine pesticide residues in to...

Claims

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Application Information

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IPC IPC(8): G01N30/88
Inventor 林国平程君奇王毅周群赵云飞陈家春
Owner TOBACCO RES INST OF HUBEI PROVINCE
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