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Detection reagent for fast detecting cyanide in water and preparation method of detection reagent

A technology for detecting reagents and water, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, which can solve the problems of inconvenient carrying and storage, small detection range, and high price. Achieve the effects of long shelf life, wide detection range, convenient carrying and storage of reagents

Inactive Publication Date: 2012-08-01
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the current cyanide rapid detection kits use liquid detection reagents, which are relatively complicated to use, have a small detection range, are inconvenient to carry and store, and are expensive.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A detection reagent for rapidly detecting cyanide in water, comprising a release reagent and a chromogenic reagent, the mass ratios of the components of the release reagent are respectively:

[0041] Potassium dihydrogen phosphate 0.52g;

[0042] Methylcellulose 0.03g;

[0043] Deionized water 2ml;

[0044] Lactic acid, acetone mixed solvent 2ml;

[0045] Chloramine T 0.02g;

[0046] The volume ratio of lactic acid and acetone in the mixed solvent of lactic acid and acetone is 1:9.

[0047] The preparation of described releasing reagent comprises the following steps:

[0048] (1) Mix and grind potassium dihydrogen phosphate 0.52g, methylcellulose 0.03g and 2ml deionized water evenly to make a paste;

[0049] (2) Transfer the paste prepared in step (1) to a watch glass, then place it in a vacuum drying oven, and dry it at 60°C for 2 hours;

[0050] (3) Take out the dried product in step (2) from the vacuum drying oven, cool it at room temperature for 10 minutes, an...

Embodiment 2

[0055] A detection reagent for rapidly detecting cyanide in water, comprising a release reagent and a chromogenic reagent, the mass ratios of the components of the release reagent are respectively:

[0056] Potassium dihydrogen phosphate 0.66g;

[0057] Methylcellulose 0.06g;

[0058]3ml deionized water;

[0059] Lactic acid, acetone mixed solvent 3ml;

[0060] Chloramine T 0.03g;

[0061] The volume ratio of lactic acid and acetone in the mixed solvent of lactic acid and acetone is 1:9.

[0062] The preparation of described releasing reagent comprises the following steps:

[0063] (1) Mix and grind 0.66g of potassium dihydrogen phosphate, 0.06g of methylcellulose and 3ml of deionized water to make a paste;

[0064] (2) Transfer the paste prepared in step (1) to a watch glass, then place it in a vacuum drying oven, and dry it at 90°C for 2 hours;

[0065] (3) Take out the dried product in step (2) from the vacuum drying oven, cool it at room temperature for 15 minutes, a...

Embodiment 3

[0070] A detection reagent for rapid detection of cyanide in water, comprising a release reagent and a chromogenic reagent, the mass ratios of the raw materials of the chromogenic reagent components are respectively:

[0071] Sodium hydroxide 0.8g;

[0072] Isonicotinic acid 1.7g;

[0073] Barbituric acid 0.8g;

[0074] Methylcellulose 0.2g;

[0075] 1ml of deionized water.

[0076] The preparation of described chromogenic reagent comprises the following steps:

[0077] (1) Add 0.8g of sodium hydroxide, 1.7g of isonicotinic acid, 0.8g of barbituric acid, and 0.2g of methylcellulose into a mortar, add 1ml of deionized water and grind them evenly. prepared paste;

[0078] (2) Transfer the paste prepared in step (1) to a watch glass, then place it in a vacuum drying oven, and dry it at 60°C for 2 hours;

[0079] (3) Take out the dried product in step (2) from the vacuum drying oven, cool it at room temperature for 10 minutes, and then place it in a mortar and grind it evenl...

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PUM

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Abstract

The invention relates to a detection reagent for fast detecting cyanide in water. The detection reagent comprises a release reagent and a color developing reagent, wherein the release reagent comprises monopotassium phosphate, methylcellulose, lactic acid and acetone mixed solvents and chloramine T, the color developing reagent comprises sodium hydroxide, isonicotinic acid, barbituric acid and methylcellulose, and the release reagent and the color developing reagent are encapsulated in a separated way according to the consumption for each time. The release reagent comprises the preparation steps that: 1, major ingredients and deionized water are mixed and ground into paste; 2, the paste is placed in a vacuum drying box for drying; 3, dried materials are cooled and ground into powder; 4, the lactic acid and acetone mixed solvents are used for preparing 5% chloramine T solution; and 5, the chloramine T solution is added into the prepared powder, the materials are dried in the air, and the powdery release reagent is obtained. The preparation steps of the release reagent refer to the partial steps. The detection reagent disclosed by the invention can be matched with a colorimetric tube and a standard colorimetric card to be used, the carrying is convenient, the detection range is wide, the time is short, and convenience can be provided for the fast detection of the cyanide in water in various sites.

Description

technical field [0001] The invention relates to a reagent for detecting cyanide, in particular to a detection reagent for rapidly detecting free cyanide and cyanogen chloride in a water environment and a preparation method thereof. Background technique [0002] Cyanide is a commonly used chemical product, widely used in metallurgy, electroplating, chemical fiber, paint, fuel, rubber and other industries. Cyanide is also a highly toxic and easily degradable special chemical. The cyanide in the water environment in our living environment mainly comes from various industrial pollution. Industrial wastewater such as metallurgy, electroplating, coking, pesticide manufacturing, and chemical fiber manufacturing generally contain cyanide in varying degrees, and sometimes it is caused by human factors. cyanide pollutes water bodies. Cyanide in the water environment is very harmful to aquatic organisms. When the concentration of cyanide ion in water is 0.04-0.1mg / L, it can cause fis...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 龙亿涛宋奇侠薛进群陈丽霞任朝斌孔聪
Owner EAST CHINA UNIV OF SCI & TECH
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