Method for detecting residual quantity of organochlorine pesticides in raw milk
A technology for pesticide residues and detection methods, which is applied in the field of detection of organochlorine pesticide residues in raw milk, can solve the problems of complicated purification steps, interference of detection results, cumbersome operation, etc., and achieves optimized gas chromatography conditions and short pretreatment time , the effect of improving the extraction rate
Active Publication Date: 2014-08-20
BEIJING SANYUAN FOOD
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[0002] Organochlorine pesticides (OCPs) are a class of broad-spectrum insecticides. Due to their low price and high insecticidal efficiency, they were once the most widely used insecticides in the world. They were used in large quantities in my country from the 1950s to the 1980s, but due to their Stable chemical properties, long half-life, and can be enriched through the biological chain, can cause chronic poisoning or teratogenic, carcinogenic, mutagenic, etc.
[0003] At present, the detection of organochlorine pesticides in raw milk is mainly based on the provisions of GB / T5009.19-2008 "Determination of multi-component residues of organochlorine pesticides in food". Different, complex purification steps and other factors, there are still many problems in daily testing
In addition to the cumbersome operation of the detection method for organochlorine pesticide residues in the national standard, the chromatographic column purification method is not suitable for raw milk and other samples containing a large amount of protein and fat. Improper purification, many and large impurity peaks interfere with the detection results. obvious
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[0046] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art, and the raw materials used are all commercially available products.
[0047] The detection method of organochlorine pesticide residue in the embodiment raw milk
[0048] The detection method of this embodiment involves 19 kinds of organochlorine pesticides, namely: α-666, γ-666, β-666, heptachlor, δ-666, aldrin, oxychlordane, epoxy heptachlor A, cyclo Oxyheptachlor B, trans-chlordane, cis-chlordane, α-endosulfan, p,p'-DDE, Di reagent, o,p'-DDT, p,p'-DDD, β-endosulfan, p , p'-DDT and endosulfan sulfate.
[0049] The external standard calibration curve method is used for quantification, which specifically includes the following steps:
[0050] 1. Preparation of the mixed standard working solution of the ref...
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Abstract
The invention provides a method for detecting the residual quantity of organochlorine pesticides in raw milk. The method comprises the following steps: determining the organochlorine pesticides in a sample by adopting gas chromatography, wherein the sample is extracted and purified before the determination; extracting the organochlorine pesticides in raw milk by an organic solvent, purifying, concentrating, and carrying out gas chromatographic determination; and calculating according to a standard work curve to obtain the residual quantity of the organochlorine pesticides in the sample. The method has the advantages of simple operation, less interferences on target objects, stable data result, high accuracy, and realization of the system reappearance and applicability reaching requirements. Additionally, gas chromatographic conditions are optimized, the method can simultaneously detect the residual quantity of nineteen organochlorine pesticides, and accords with present requirements of the detection of the organochlorine pesticides in the raw milk.
Description
technical field [0001] The invention relates to a method for detecting pesticide residues, in particular to a method for detecting organochlorine pesticide residues in raw milk. Background technique [0002] Organochlorine pesticides (OCPs) are a class of broad-spectrum insecticides. Due to their low price and high insecticidal efficiency, they were once the most widely used insecticides in the world. They were used in large quantities in my country from the 1950s to the 1980s, but due to their It has stable chemical properties, long half-life, and can be enriched through the biological chain, which can cause chronic poisoning or teratogenicity, carcinogenicity, and mutagenicity. [0003] At present, the detection of organochlorine pesticides in raw milk is mainly based on the provisions of GB / T5009.19-2008 "Determination of multi-component residues of organochlorine pesticides in food". Different, various factors such as complicated purification steps, there are still many ...
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IPC IPC(8): G01N30/88
Inventor 徐晨于超赵旭付尧白素琴陈历俊
Owner BEIJING SANYUAN FOOD