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Chromatographic column for analyzing multiple pesticide residues in complex matrix and applying method of chromatographic column

A technology for complex matrix and pesticide residues, applied in the field of chromatographic columns, can solve the problems of incorrect measurement of pesticide loss and limited purification effect, and achieve the effects of fast operation, simple operation and simple packing method.

Active Publication Date: 2015-05-13
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specific methods, such as using buffer salt extraction, microwave heating and other methods, but after testing, it was found that the purification effect of these methods on organic phosphorus, pyrethroids, organic chlorine and other pesticides is still limited, and many pesticides are still covered by impurities; in addition, Pesticide losses from microwaving samples were also not properly accounted for

Method used

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  • Chromatographic column for analyzing multiple pesticide residues in complex matrix and applying method of chromatographic column
  • Chromatographic column for analyzing multiple pesticide residues in complex matrix and applying method of chromatographic column
  • Chromatographic column for analyzing multiple pesticide residues in complex matrix and applying method of chromatographic column

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 Chromatographic column

[0040] The inner diameter of the glass chromatography column tube is 0.6 cm, and the tube length is 20 cm; the inner diameter of the upper cup of the chromatography column tube is 3.8 cm, and the length is 6 cm. The particle size range of magnesium silicate is 150-250 μm, and the particle size range of graphitized carbon is 37-125 μm.

[0041] A proper amount of absorbent cotton, 2 g of anhydrous sodium sulfate, 40 mg of graphitized carbon, 2 g of magnesium silicate, and 2 g of anhydrous sodium sulfate were successively loaded into a dry and clean glass chromatography column tube.

[0042] Each component forms a layer of its own, independent of each other, and does not mix.

Embodiment 2

[0043] Embodiment 2 chromatography column

[0044] The inner diameter of the glass chromatography column tube is 1.5 cm, and the tube length is 10 cm; the particle size range of magnesium silicate is 150-250 μm, and the particle size range of graphitized carbon is 37-125 μm.

[0045] Appropriate amount of absorbent cotton, 5 g of anhydrous sodium sulfate, 400 mg of graphitized carbon, 6 g of magnesium silicate, and 5 g of anhydrous sodium sulfate were successively loaded into a dry and clean glass chromatography column tube.

[0046] Each component forms a layer of its own, independent of each other, and does not mix.

Embodiment 3

[0047] Embodiment 3 chromatography column

[0048]The inner diameter of the glass chromatography column tube is 1.0 cm, and the tube length is 13 cm. The particle size range of magnesium silicate is 150-250 μm, and the particle size range of graphitized carbon is 37-125 μm.

[0049] A proper amount of absorbent cotton, 3 g of anhydrous sodium sulfate, 100 mg of graphitized carbon, 3 g of magnesium silicate, and 3 g of anhydrous sodium sulfate were successively loaded into a dry and clean glass chromatography column tube.

[0050] Each component forms a layer of its own, independent of each other, and does not mix.

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Abstract

The invention discloses a chromatographic column for analyzing multiple pesticide residues in a complex matrix and an applying method of the chromatographic column, and belongs to the field of monitoring of pesticide residues. The invention firstly discloses a chromatographic column for analyzing multiple pesticide residues in a complex matrix. The chromatographic column comprises a chromatographic column tube and filler, wherein the filler comprises the following components: anhydrous sodium sulfate, graphitized carbon and magnesium silicate. The invention further discloses a method for analyzing multiple pesticide residues in a complex matrix by applying the chromatographic column. The method comprises the following steps: (1) pre-leaching the chromatographic column by using a leaching solution; (2) adding an elution solvent in a to-be-purified sample for being dissolved to prepare a sample loading solution; (3) adding the sample loading solution in the chromatographic column treated by the step (1); and (4) eluting with the elution solvent, and collecting an eluant. The chromatographic column disclosed by the invention has a good purifying effect, is clear and distinguishable in a chromatographic peak of a target compound and high in sample recovery rate; the method is simple, convenient and rapid to operate.

Description

technical field [0001] The invention relates to a chromatographic column, in particular to a chromatographic column for analyzing multi-pesticide residues in a complex matrix (such as onion, ginger, garlic, etc.) and an application method thereof, belonging to the field of pesticide residue monitoring. Background technique [0002] The analysis of multiple pesticide residues in complex matrices is a technical difficulty in the detection of pesticide residues, especially complex matrices such as onions, ginger, and garlic. There are a lot of sulfur-containing compounds in the matrix such as onion, ginger, and garlic, which seriously interfere with the determination of pesticides in the matrix. It is believed that the alliinase present in it degrades alliin into extremely unstable allicin, and allicin is rapidly degraded into sulfides, sulfonates, ethers, etc. (H. Zhang et al., Food Chemistry, 108 (2008) 322–328). And alliinase exists in the cell vacuole, before the cells ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/14G01N30/02
Inventor 王新全齐沛沛徐浩章虎王祥云汪志威王强李振
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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