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Adsorbing material, and method for detecting content of carbamate pesticide residues in tobacco leaves

A technology of carbamates and adsorption materials, which is applied in the directions of analysis materials, measuring devices, material separation, etc., can solve the problems of difficult quantitative detection and unsatisfactory qualitative analysis effect.

Active Publication Date: 2020-05-08
HUBEI CHINA TOBACCO IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, for the carbamate pesticide residues contained in tobacco leaves, since its content basically reaches the trace level
It is difficult to separate the chromatographic peaks by using a chromatograph, the qualitative analysis effect is not ideal, and the quantitative detection is even more difficult

Method used

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  • Adsorbing material, and method for detecting content of carbamate pesticide residues in tobacco leaves
  • Adsorbing material, and method for detecting content of carbamate pesticide residues in tobacco leaves
  • Adsorbing material, and method for detecting content of carbamate pesticide residues in tobacco leaves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Synthesis of Adsorbent Materials. Under nitrogen atmosphere, 0.126 g melamine (molar mass 126.12), 0.245 g 3,5-dihydroxybenzaldehyde (molar mass 138.12), DMSO (25 ml) were added to the flask, and the mixed solution was refluxed at 180 °C for 72 h , after cooling, washed with a mixture of DMF (40 ml), methanol (40 ml) and THF (40 ml), dried at 60 °C, and grinded to obtain an adsorbent.

[0039] Detection of carbamate pesticide residues. Weigh 0.3 g of tobacco leaves into a 4 mL EP tube, add 2 mL of 45 vol% methanol-water solution, ultrasonically extract for 5 min, take 1 mL of supernatant, and dilute to 30 mL with 45% methanol-water solution for use. Put 30 mg of SNW material into 30 mL of sample solution (no pH adjustment), extract at 600 rpm for 50 min, centrifuge to remove the sample solution, then add 0.5 mL of acetonitrile for ultrasonic desorption for 15 min, centrifuge, and take 30 µL for injection to HPLC-UV analysis.

Embodiment 2

[0041] Synthesis of Adsorbent Materials. Under nitrogen atmosphere, 0.252g melamine (molar mass 126.12), 0.138 g 3,5-dihydroxybenzaldehyde (molar mass 138.12), DMSO (25 ml) were added to the flask, and the mixed solution was refluxed at 180 °C for 72 h , after cooling, washed with a mixture of DMF (40 ml), methanol (40 ml) and THF (40 ml), dried at 60 °C, and grinded to obtain an adsorbent. The detection of carbamate pesticide residues is the same as in Example 1.

Embodiment 3

[0043] Synthesis of Adsorbent Materials. Under nitrogen atmosphere, 0.595g 2,4,6-triaminobenzene-1,3,5-tricarboxylic acid (molar mass 297.264), 0.138 g 3,4-dihydroxybenzaldehyde (molar mass 138.12), tetrachloro Carbon dioxide (25 ml) was added to the flask, and the mixed solution was refluxed at 180 °C for 72 h, cooled and washed with a mixed solution consisting of DMF (40 ml), methanol (40 ml), and THF (40 ml). , and then dried at 60 °C, and the adsorbent material was obtained after grinding. The detection of carbamate pesticide residues is the same as in Example 1.

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Abstract

The invention discloses an adsorbing material, and a method for detecting the content of carbamate pesticide residues in tobacco leaves. The adsorbing material is an oxime polymer laterally connectedwith an aromatic conjugated ring, and a pi-p electron accumulation effect is generated between the aromatic conjugated ring of the adsorbing material and a carbamate group of a carbamate substance, sothat reliable adsorption force is formed. The adsorbing material is used for adsorbing carbamate pesticide residues contained in a tobacco leaf sample solution, and then desorbs, and chromatographicanalysis is carried out, so that the problems that quantitative analysis cannot be carried out and the variety cannot be qualitatively analyzed due to the fact that the content of the carbamate pesticide residues is trace are solved.

Description

technical field [0001] The invention relates to the technical field of tobacco leaf pesticide residue detection, in particular to an adsorption material and a method for detecting carbamate pesticide residue content in tobacco leaves. Background technique [0002] With the development of agricultural industrialization, the production of agricultural products is increasingly dependent on chemical and biological products such as pesticides, antibiotics and hormones. The unreasonable use of these substances will inevitably lead to excessive residues in agricultural products, affecting the food safety of consumers, and in severe cases will cause consumers to become ill, develop abnormally, and even directly lead to poisoning death. One of the most effective ways to control the harm of pesticide residues to the human body is to strengthen the supervision of the use of chemical and biological products. To ensure the supervision, the ability and efficiency of pesticide residue dete...

Claims

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Application Information

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IPC IPC(8): B01J20/285B01J20/30B01D15/08G01N30/02
CPCB01J20/285B01D15/08G01N30/02
Inventor 李冉宋旭艳魏敏董爱君何昀潞
Owner HUBEI CHINA TOBACCO IND
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