Method for quickly detecting thiocyanate in liquid milk and detection test paper thereof

A technology for detecting thiocyanate and test paper, which is applied in the direction of material analysis through observation of the influence on chemical indicators, and analysis through chemical reactions of materials, etc., which can solve the complicated detection methods, long detection cycle, and inconvenient detection and other issues, to achieve the effect of light weight, short detection cycle, easy to popularize

Inactive Publication Date: 2010-09-08
陕西出入境检验检疫局检验检疫技术中心
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Problems solved by technology

[0017] The invention provides a rapid detection method of thiocyanate in liquid milk and its detection test paper to solve the problems of inconvenient detection, high detection cost,

Method used

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Embodiment Construction

[0030] Preparation method of test paper for rapid detection of thiocyanate in liquid milk of the present invention:

[0031] First select ordinary qualitative slow-speed filter paper and immerse it in the ferric chloride solution with a concentration of 15%. After the solution is completely immersed in the filter paper, take out the filter paper, air-dry or dry at low temperature, or add the ferric chloride solution after beating the filter paper. In repaper, tumble dry. Drying can independently select the shape, size and specific structure of the test paper according to specific work requirements.

[0032] Next, prepare the standard chromatogram. The standard chromatogram is a standard chromatographic band made by dipping test paper into liquid milk containing different known concentrations of thiocyanate. The color at the end of the reaction represents thiocyanate in the liquid milk. The lighter the color, the lower the content of thiocyanate in liquid milk, and vice versa....

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Abstract

The invention relates to quick detection test paper for thiocyanate and a preparation method thereof, in particular to quick detection test paper for thiocyanate in liquid milk and a preparation method thereof, which mainly solve the problems of high detection cost, low detection efficiency and long detection period when the thiocyanate content of the liquid milk is detected in the prior art. The method mainly comprises the following steps of: A, preparing the test paper; B, preparing a standard contrast; C, performing detection; and D, judging a result. The test paper is prepared mainly based on the principle that thiocyanate [SCN] is reacted with Fe3+ to generate sanguine [Fe(NCS)(H2O)5]2+ with color difference according to different concentrations. The test paper comprises a test paper base body and detection layers which are arranged on positive and negative surfaces of the test paper base body respectively and contain trivalent iron ions.

Description

technical field [0001] The invention relates to a rapid detection method of thiocyanate and its detection test paper, in particular to a rapid detection method of thiocyanate in liquid milk and its detection test paper. Background technique [0002] Thiocyanate (thiocyanate), also known as sulfur cyanide. The salts of thiocyanate HSCN, except silver thiocyanate, mercury thiocyanate, copper thiocyanate, gold thiocyanate, etc., are all soluble in water. [0003] Commonly used are potassium salt KSCN, sodium salt NaSCN and ammonium salt NH 4 SCN are colorless crystals. NaSCN is white orthorhombic crystal or powder, soluble in water, ethanol and acetone, and easy to deliquescence, mainly used in printing and dyeing industry, belongs to chemical raw material, can be used as acrylonitrile fiber spinning solvent, chemical analysis reagent, color Film film rinse agent, some plant defoliants and airport road herbicides, can also be used in pharmaceuticals, printing and dyeing, rub...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 张遴乐爱山陈欣蔡砚王昌钊张新智
Owner 陕西出入境检验检疫局检验检疫技术中心
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