Water body, method for rapidly detecting residue of malachite green and colorless malachite green in aquatic product and detection box therewith

A colorless malachite green and malachite green technology, applied in the field of residue detection, can solve the problems of expensive, cumbersome and time-consuming instruments, and achieve the effect of few steps and simple operation.

Active Publication Date: 2009-10-28
JIANGSU TRIGIANT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These detection methods are relatively cumbersome, with many pre-processing steps and time-consuming, especially th

Method used

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  • Water body, method for rapidly detecting residue of malachite green and colorless malachite green in aquatic product and detection box therewith
  • Water body, method for rapidly detecting residue of malachite green and colorless malachite green in aquatic product and detection box therewith

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Determination of total malachite green residues in water bodies.

[0026] Use extractant I to activate the color developer in the enrichment column by mixing silica gel, neutral alumina and 732 cationic resin in a weight ratio of 4:5:1, the quality of the loaded color developer is 1g, and the activated The mixed solution of acetonitrile, dichloromethane and n-hexane was 10mL, the volume ratio of acetonitrile, dichloromethane and n-hexane=2:1:1; the filled anhydrous sodium sulfate (Na 2 SO 4 ) has a mass of 0.8g.

[0027] Take the water body sample to be detected in the sample tube, add extractant I and extractant II, the extraction agent I is a mixed liquid of acetonitrile, dichloromethane, n-hexane and p-toluenesulfonic acid, wherein the volume of acetonitrile, dichloromethane and n-hexane The ratio is 1:1:1, the solution of p-toluenesulfonic acid 1.0mol / L, the volume ratio of the mixture of acetonitrile, dichloromethane and n-hexane to p-toluenesulfonic acid solutio...

Embodiment 2

[0031] Only change the quality of packing chromogen into 1.5g in the enrichment column; The anhydrous sodium sulfate (Na 2 SO 4 ) quality is changed into 1.4g, and all the other are the same as the description to embodiment 1.

Embodiment 3

[0033] Only change the quality of packing chromogen into 2.5g in the enrichment column; The anhydrous sodium sulfate (Na 2 SO 4 ) quality into 2.5g, all the other are the same as the description of embodiment 1.

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Abstract

The invention relates to a water body, a method for rapidly detecting the residue of malachite green and colorless malachite green in an aquatic product, belonging to the technical field of residue detection in a water body and an aquatic product. The method comprises the following steps: oscillating and mixing a sample to be detected and an extractant I uniformly; adding an extractant II, oscillating and mixing and then standing still; taking and adding an supernatant to an enrichment column; observing color change of a chromogenic reagent on the lowest layer; and determining that the sample contains the malachite green and colorless malachite green if a green circular strap is formed. The extractant I is a mixed solution of acetonitrile, dichloromethane, n-hexane and paratoluenesulfonic acid, the extractant II is a mixture of lead dioxide and acid alumina, and the sample to be detected is a water body sample to be detected or an aquatic product sample to be detected. The invention has the advantages of simple operation and fewer steps, does not need expensive instruments and equipment and can embody the convenience and the flexibility to on-site detection.

Description

technical field [0001] The invention belongs to the technical field of residue detection in water bodies and aquatic products, and in particular relates to a rapid detection method for malachite green and colorless malachite green residues in water bodies and aquatic products. Background technique [0002] Malachite green (Malachite green, MG), also known as basic green, malachite green, aniline green, Victoria green or Chinese green, is a kind of emerald green crystal with metallic luster, belonging to triphenylmethane dyes, it is both a fungicide and a It is a dyeing agent, widely used in the dyeing of silk, wool, leather, cotton, linen and ceramic products. It is easily soluble in water, ethanol and methanol, and its aqueous solution is blue-green. After malachite green enters the human body or animal body, it can be reductively metabolized into fat-soluble recessive malachite green (Leucomalachitegreen, LMG) through biotransformation. As a fungicide, insecticide, and d...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N30/08
Inventor 张根华詹月华张海芸尹凡丁建英
Owner JIANGSU TRIGIANT TECH
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