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Method for determining and correcting cyanide

A calibration method, cyanide technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of unsafe preservation and management, and achieve the effects of easy mastery, reduced risk, and convenient sampling

Inactive Publication Date: 2012-07-11
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since potassium cyanide is a highly toxic substance and a hazardous chemical, it is potentially unsafe during storage management and operation

Method used

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Examples

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Embodiment Construction

[0028] Concrete operation steps of the present invention are:

[0029] 1. Take 10ml of distillate in a 25ml stoppered colorimetric tube;

[0030] 2. Add 5 ml of phosphate buffer solution to the tube, mix well, quickly add 0.2 ml of chloramine solution, immediately cover the tube, mix well, and place it for 3-5 minutes;

[0031] 3. Add 5 ml of isonicotinic acid-pyrazolone mixed solution to the tube, mix well, add water to dilute to the marked line, shake well, and place in 25-35°C aqueous solution for 40 minutes;

[0032] 4. At a wavelength of 638nm, use a 1cm cuvette and use the reagent blank as a reference to measure the absorbance, and find out the corresponding cyanide content from the standard curve.

[0033] Precautions in the above operation steps:

[0034] 1. When collecting water samples for the determination of cyanide, alkali must be added to fix them, and solid sodium hydroxide must be added to pH>12.

[0035] 2. Water samples for cyanide should be tested as soon...

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Abstract

The invention discloses a method for determining and correcting cyanide. The method is characterized by comprising the following steps of: 1) putting 10 milliliters of distillate in a colorimetric tube which has a volume of 25 milliliters and is provided with a plug; 2) adding 5 milliliters of phosphate buffer solution into the tube, mixing uniformly, quickly adding 0.2 milliliter of chloramine solution, immediately inserting the plug, mixing uniformly and placing for 3 to 5 minutes; 3) adding 5 milliliters of isonicotinic acid-pyrazolone mixed solution into the tube, uniformly mixing, adding water to dilute until mixture reaches a marked line, shaking uniformly, and placing in an aqueous solution at the temperature of between 25 and 35 DEG C for 40 minutes; and 4) determining absorbance by using a cuvette with height of 1cm, and using reagent blank as reference at the wave length of 638nm, and finding out the corresponding cyanide content from the standard curve. By using an intermediate medium, the cost of purchasing, storing and managing toxic and dangerous chemicals is reduced, and potential unsafe factors of the toxic and dangerous chemicals in using operation can be reduced.

Description

Technical field: [0001] The invention is mainly used for the determination and analysis of cyanide in phenol cyanide sewage. Background technique: [0002] For the determination and analysis of cyanide in phenol cyanide sewage, potassium cyanide standard substance is generally used to prepare a standard solution for accuracy correction, that is, analytically pure potassium cyanide (this product is a highly toxic and dangerous chemical) is used to prepare a known concentration Then use the detection method to analyze the solution, and compare the analysis result with the prepared known concentration value to obtain the error of the determination process. [0003] Since potassium cyanide is a highly toxic substance and a dangerous chemical, it is potentially unsafe during storage management and operation. Invention content: [0004] In order to reduce the use cost of highly toxic and dangerous chemicals and reduce the risk of use, the present invention proposes a non-to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
Inventor 李双林
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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