Method for quantitatively detecting pesticide residue in grain through THz-TDS technology
A technology for quantitative detection and pesticide residues, applied in measurement devices, material analysis by optical means, instruments, etc., can solve problems such as affecting the authenticity of test samples, waste of drugs, etc., to achieve the effect of reliable identification model and analysis results.
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[0057] Example 1
[0058] This embodiment provides a method for quantitatively detecting the content of acetamiprid in a wheat sample using THz-TDS technology combined with chemometrics, wherein the "wheat sample" uses wheat flour for cakes that does not contain any pesticide residues (Binzhou Taiyu Mai Industry Co., Ltd.) was prepared by adding a known amount of Acetamiprid (provided by Beijing Beina Chuanglian Biotechnology Research Institute), and using the "wheat sample" as a blind sample to be tested by the method of the present invention, the specific steps are as follows:
[0059] (1) Put the wheat flour for cakes into a pulverizer, sieved (200 mesh), and dried in an oven to obtain primary wheat powder; the primary wheat powder and acetamiprid powder are in different mass ratios Mix and transfer to an agate mortar for further grinding to obtain the "wheat sample" fine powder, wherein the mass percentage of acetamiprid in the "wheat sample" is 0%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5...
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[0097] Example 2
[0098] This embodiment provides a method for quantitatively detecting the content of carbaryl in a rice sample using THz-TDS technology combined with chemometrics, wherein the "rice sample" uses rice that does not contain any pesticide residues (Jilin Jiafu Rice Industry Co., Ltd.) was prepared by adding a known amount of carbaryl (provided by Beijing Beina Chuanglian Biotechnology Research Institute), and the "rice sample" was used as a blind sample for detection using the method of the present invention. The specific steps are as follows:
[0099] (1) Put the rice into a pulverizer, smash it, sieved (100 mesh), and dry in an oven to obtain rice powder; mix the rice powder and carbaryl powder according to different mass ratios, and transfer to Agate Research The fine powder of the "rice sample" is obtained by further grinding in a bowl, wherein the mass percentage of carbaryl in the "rice sample" is 0%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9 %, 1.0%, 2.0%, 3.0%, 4.0...
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