A kind of detection method of detecting cyanide content

A detection method and cyanide technology, which are applied in the fields of measuring devices, electrochemical variables of materials, preparation of samples for testing, etc., can solve the problems that the detection of hydrogen cyanide and cyanide is not simple enough, the sensitivity is not enough, etc., and it is easy to popularize and apply. Simple operation and good adaptability

Active Publication Date: 2020-07-28
广东华晟安全职业评价有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problems that the detection of hydrogen cyanide and cyanide in the prior art is not simple enough, fast enough, and the sensitivity is not enough, the present invention provides a detection method, which is easy to operate and can quickly detect the content of hydrogen cyanide and cyanide

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  • A kind of detection method of detecting cyanide content

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Embodiment 1

[0030] Embodiment 1 A kind of detection method that detects cyanide content

[0031] A detection method for detecting cyanide content, establishes a cyclic voltammetry (CV) for directly measuring cyanide concentration in a sample, and detects under a three-electrode system of a working electrode, an auxiliary electrode, and a reference electrode, and adopts a standard curve method Carry out quantitative analysis to sample to obtain result, detection method comprises the following steps:

[0032] (1) Sample preparation: add different concentrations of hydrocyanic acid and sodium cyanide to an appropriate amount of sodium hydroxide for alkaline hydrolysis for 10 minutes, then add 100g / L zinc acetate solution and saturated tartaric acid solution, the amount of addition is the sample: the volume ratio of zinc acetate solution is equal to 1:4, sample: saturated tartaric acid solution volume ratio is equal to 1:2;

[0033] (2) Preparation of standard solution: the potassium cyanide...

Embodiment 2

[0043] Embodiment 2 A kind of detection method that detects cyanide content

[0044] A detection method for detecting cyanide content, establishes a cyclic voltammetry (CV) for directly measuring cyanide concentration in a sample, and detects under a three-electrode system of a working electrode, an auxiliary electrode, and a reference electrode, and adopts a standard curve method Carry out quantitative analysis to sample to obtain result, detection method comprises the following steps:

[0045] (1) Sample preparation: add potassium cyanide and cyanogen chloride of different concentrations to an appropriate amount of sodium hydroxide for alkaline hydrolysis for 15 minutes, then add 200g / L zinc acetate solution and saturated tartaric acid solution, the amount of addition is sample: zinc acetate solution volume ratio is equal to 1:4.5, sample: saturated tartaric acid solution volume ratio is equal to 1:2.5;

[0046](2) Preparation of standard solution: the potassium cyanide sta...

Embodiment 3

[0056] Embodiment 3 A kind of detection method that detects cyanide content

[0057] A detection method for detecting cyanide content, establishes a cyclic voltammetry (CV) for directly measuring cyanide concentration in a sample, and detects under a three-electrode system of a working electrode, an auxiliary electrode, and a reference electrode, and adopts a standard curve method Carry out quantitative analysis to sample to obtain result, detection method comprises the following steps:

[0058] (1) Sample preparation: add acrylonitrile and n-butyronitrile with appropriate amount of sodium hydroxide for alkaline hydrolysis for 20 minutes, then add 300g / L zinc acetate solution and saturated tartaric acid solution, the amount of addition is sample: zinc acetate solution volume ratio is equal to 1 :5, sample: saturated tartaric acid solution volume ratio is equal to 1:3;

[0059] (2) Preparation of standard solution: the potassium cyanide standard stock solution that is configur...

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Abstract

The invention discloses a method for detecting the content of hydrogen cyanide and cyanide. According to the method, CV (Cyclic Voltammetry) for directly measuring the concentration of the cyanide ina sample is established; then, measuring is performed by using differential pulse voltammetry; the content of the hydrogen cyanide and the cyanide is detected in a three-electrode system which takes acomposite membrane-modified glassy carbon electrode as a working electrode, a platinum wire electrode as an auxiliary electrode and a saturated calomel electrode as a reference electrode; the sampleis subjected to quantitative analysis by adopting a standard curve method to obtain a result. The method comprises the following steps: (1) preparing a sample; (2) preparing a standard solution; (3) detecting. The method is easy to operate, high in accuracy, high in sensitivity and high in specificity.

Description

technical field [0001] The invention relates to the technical field of cyanide detection, in particular to a detection method for detecting hydrogen cyanide and cyanide content. Background technique [0002] Cyanide is a highly toxic substance, which can enter the human body through the respiratory tract, digestive tract and skin, and binds to the ferric iron of the oxidative cytochrome oxidase in the mitochondria of the cell, preventing the reduction of the ferric iron in the oxidase and hindering the normal respiration of the cells. Causes hypoxia in the body resulting in a toxic effect. In addition, cyanide may form other harmful compounds under certain conditions, which poses a safety risk in food and beverages. Due to the rapid development of modern industry, many cyanides enter natural water bodies through sewage discharged from electroplating, paint, dye, rubber and other industries, seriously endangering human health. Since 2009, there have been many incidents of c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48G01N27/30G01N1/28
CPCG01N1/28G01N27/308G01N27/48G01N2001/2893
Inventor 刘斌李会武汪丰梅齐向上王程媛何春燕
Owner 广东华晟安全职业评价有限公司
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