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Pesticide residue quick test card red sheet and preparation method thereof

A technology of pesticide residues and quick test cards, which is applied in the direction of analyzing materials through chemical reactions and analyzing materials through observation of the impact on chemical indicators. It can solve the problem of increased production and use costs and easy fall off of red substrates Deterioration, poor quality of red tablets and other problems, to achieve the effect of extending the shelf life, extending the shelf life, not easy to deform and rebound

Active Publication Date: 2017-12-15
广东恒度检测科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quality of the red film in the rapid test card currently on the market is not good, and the red substrate is easy to fall off and deteriorate, which is not conducive to batch storage, which increases the cost of production and use.

Method used

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  • Pesticide residue quick test card red sheet and preparation method thereof
  • Pesticide residue quick test card red sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for preparing pesticide residue quick test card red tablet, comprising the following steps,

[0036] (1), mix indophenol acetate with ethanol, stir evenly, obtain solution A;

[0037] (2), add cellulose carboxylate methyl ester in solution A, continue stirring at room temperature until cellulose carboxylate methyl ester dissolves completely, obtain solution B;

[0038] (3), get a filter paper, press mold on the filter paper to obtain the relative filter paper recessed sample port;

[0039] (4) Drop the solution B into the sample inlet, and dry to obtain the red tablet of the rapid test card for pesticide residues.

[0040] Wherein the synthetic step of indophenol acetate in step (1) comprises:

[0041] (a) Take 10 g of indophenol sodium, 200 mL of tetrahydrofuran and 5 mL of glacial acetic acid, mix them, and stir for 1 hour in the dark to obtain reaction solution C;

[0042] (b), the reaction solution C was evaporated to dryness at 25°C to obtain the reacta...

Embodiment 2

[0054] A method for preparing pesticide residue quick test card red tablet, comprising the following steps,

[0055] (1), mix indophenol acetate with acetone, stir evenly, obtain solution A;

[0056] (2), add cellulose carboxylate methyl ether in solution A, continue to stir at room temperature until cellulose carboxylate methyl ether dissolves completely, obtain solution B;

[0057] (3), get a filter paper, press mold on the filter paper to obtain the relative filter paper recessed sample port;

[0058] (4) Drop the solution B into the sample inlet, and dry to obtain the red tablet of the rapid test card for pesticide residues.

[0059] Wherein the synthetic step of indophenol acetate in step (1) comprises:

[0060] (a), take 20 g of indophenol sodium, 500 mL of tetrahydrofuran and 20 mL of glacial acetic acid, mix them, and stir for 2 hours in the dark to obtain reaction solution C;

[0061] (b), the reaction solution C was evaporated to dryness at 55°C to obtain the reac...

Embodiment 3

[0073] A method for preparing pesticide residue quick test card red tablet, comprising the following steps,

[0074] (1), mix indophenol acetate with ethanol, stir evenly, obtain solution A;

[0075] (2), add cellulose carboxylate methyl ester in solution A, continue stirring at room temperature until cellulose carboxylate methyl ester dissolves completely, obtain solution B;

[0076] (3), get a filter paper, press mold on the filter paper to obtain the relative filter paper recessed sample port;

[0077] (4) Drop the solution B into the sample inlet, and dry to obtain the red tablet of the rapid test card for pesticide residues.

[0078] Wherein the synthetic step of indophenol acetate in step (1) comprises:

[0079] (a), take 15g of indophenol sodium, 300mL of tetrahydrofuran and 15mL of glacial acetic acid, after mixing, stir for 2 hours in the dark to obtain reaction solution C;

[0080] (b), the reaction solution C was evaporated to dryness at 45°C to obtain the reacta...

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Abstract

The invention relates to the technical field of pesticide residue detection, in particular to a preparation method and a product of a pesticide residue quick test card red sheet. The preparation method comprises the following steps of: (1) mixing indophenol acetate with an organic solvent and stirring uniformly to obtain a solution A; (2) adding a cellulose-based carboxylic acid derivative into the solution A and continuing to stir at room temperature until the cellulose-based carboxylic acid derivative is completely dissolved to obtain a solution B; (3) taking a filter paper, moulding die on the filter paper to obtain a sample inlet relative to indentation of the filter paper; (4) dropping the solution B into the sample inlet, and drying to obtain the pesticide residue quick test card red sheet. According to the preparation method and the product of the pesticide residue quick test card red sheet, the cellulose-based carboxylic acid derivative is added to the solution A, the cellulose-based carboxylic acid derivative and the indophenol acetate are cross-linked and adsorbed on the card, so that a prepared red-sheet substrate is not easily peeled off, quality life is extended, and production and use costs are directly reduced; and the method is simple to operate and production costs is lowered.

Description

technical field [0001] The invention relates to the technical field of pesticide residue detection, in particular to a quick-test card red tablet for pesticide residues and a preparation method thereof. Background technique [0002] Food safety issues have seriously threatened human health, and the pesticide residues and their acute and chronic poisoning in fruits and vegetables caused by excessive use or abuse of pesticides have attracted great attention from the society. In recent years, incidents of my country's agricultural products being rejected, detained, returned, claimed and terminated by importing countries due to excessive pesticide residues have occurred from time to time. Some countries even use technical barriers to international trade to artificially set up obstacles to the export of agricultural products in my country, which has repeatedly hindered the export of vegetables in my country. [0003] Therefore, how to quickly, sensitively and accurately detect t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 余建飞侯学文彭美红
Owner 广东恒度检测科技有限公司