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Hexavalent chromium color developing agent and preparation method thereof

A color developer and hexavalent chromium technology, which is applied in the field of hexavalent chromium detection, can solve the problems of long configuration time and short shelf life of the hexavalent chromium color developer, and achieves the improvement of covering rate, detection sensitivity, and configuration efficiency. Effect

Inactive Publication Date: 2015-04-01
LIHE TECH (HUNAN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a hexavalent chromium developer and its configuration method to solve the technical problems of the prior art that the hexavalent chromium developer has a short shelf life and a long configuration time

Method used

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  • Hexavalent chromium color developing agent and preparation method thereof
  • Hexavalent chromium color developing agent and preparation method thereof
  • Hexavalent chromium color developing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The volume ratio of ester organic solvent and water-soluble organic solvent is 1:19. The added mass of diphenylcarbazide is 0.05% of the volume of the water-soluble organic solvent. The ester organic solvent is methyl acetate, and the water-soluble organic solvent is ethanol and water.

Embodiment 2

[0051] The volume ratio of ester organic solvent and water-soluble organic solvent is 19:1. The added mass of diphenylcarbazide is 0.5% of the volume of the water-soluble organic solvent. . The ester organic solvent is methyl acetate and ethyl acetate, and the water-soluble organic solvent is methanol.

Embodiment 3

[0053] The volume ratio of ester organic solvent and water-soluble organic solvent is 1:4. The added mass of diphenylcarbazide is 0.25% of the volume of the water-soluble organic solvent. . The ester organic solvent is ethyl acetate, and the water-soluble organic solvent is absolute ethanol.

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Abstract

The invention provides a hexavalent chromium color developing agent and a preparation method of the hexavalent chromium color developing agent. The hexavalent chromium color developing agent comprises a chromium indicator, and an esters organic solvent for prolonging the shelf life of the hexavalent chromium color developing agent. According to the hexavalent chromium color developing agent, diphenylcarbazide is dissolved in solvent containing the esters organic solvent, so that the shelf life of the color developing agent is prolonged and is up to more than three months; phthalate anhydride and other slightly-soluble quality-guaranteeing agents are not required in the color developing agent, and the allocation efficiency of the color developing agent is improved; and besides, the color developing agent also can improve the coverage rate of a sample to the light rays of a light source in a hexavalent chromium detection process, even if the content of the hexavalent chromium in the sample is low, the hexavalent chromium can be detected, and the detection sensitivity can be improved.

Description

technical field [0001] The invention relates to the field of hexavalent chromium detection, in particular to a hexavalent chromium developer and a configuration method thereof. Background technique [0002] When testing whether a sample contains hexavalent chromium, it is necessary to add a hexavalent chromium developer to the sample, and then detect the absorbance value of the sample. According to the hexavalent chromium content corresponding to the absorbance value in the standard curve prepared by the standard product, the hexavalent chromium content in the sample is determined. [0003] The existing hexavalent chromium developer has the following problems: [0004] 1) Use acetone and other substances that are toxic to the human body as solvents to increase the damage of the color developer to the human body during use; [0005] 2) In the prior art, phthalic anhydride is added to the color developer to properly prolong the shelf life of the color developer. In actual o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/77
Inventor 熊毅
Owner LIHE TECH (HUNAN) CO LTD
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