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Method for detecting trace sulfate radical content in cobalt chloride

A detection method, sulfate radical technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of wrong detection results, large amount of barium chloride, complicated operation, etc., and achieve both detection precision and accuracy and inspection process time The effect of short and few operation steps

Inactive Publication Date: 2015-10-28
TIANJIN MAOLIAN SCI & TECH
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Problems solved by technology

This method has high technical requirements, complicated operation, and time-consuming process. The detection limit Poor, and due to the existence of high content of cobalt, it is necessary to bring a sample blank, which is easy to cause errors in the detection results, and in actual production, try to improve the utilization rate of barium chloride by prolonging the reaction time, but the effect is not ideal, resulting in the removal of sulfuric acid The amount of barium chloride in the root process is large, and the production cost increases

Method used

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  • Method for detecting trace sulfate radical content in cobalt chloride
  • Method for detecting trace sulfate radical content in cobalt chloride
  • Method for detecting trace sulfate radical content in cobalt chloride

Examples

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Embodiment 1

[0019] Step 1: Add water to the cobalt chloride to be detected to make it a cobalt chloride solution, and then continuously add barium chloride solution to the cobalt chloride solution until no precipitation occurs. According to the barium chloride quality that has added, then add 2 times of barium chloride solution to this cobalt chloride solution. Accurately record the total mass of the barium chloride solution added twice, and record it as mass M;

[0020] Second step: configure one group of sulfate radical standard solutions with content difference, respectively add the barium chloride solution of quality M in this group of sulfate radical standard solutions, then filter it, and obtain the filtrate after filtering;

[0021] The third step: Utilize the atomic absorption spectrometer to test the sulfate radical standard solution obtained by filtering in the second step. Take the absorbance of barium obtained from the test as the abscissa, and take the content of sulfate as ...

Embodiment 2

[0024] see figure 1 , a cobalt chloride product, containing 24.30% cobalt, first take 10g sample and dissolve it in water, add 0.5g / L barium chloride solution until no precipitation occurs, then add 3ml of barium chloride solution. Add 7ml of 0.5g / L barium chloride solution to the cobalt chloride solution again and mix well, filter the sample filtrate to a constant volume of 100ml. Then configure a group of 0.001%, 0.005%, 0.010%, 0.015%, 0.020% sulfate radical standard solutions, then add 10ml of 0.5g / L barium chloride solution, and filter the filtrate to test the absorbance of barium with an atomic absorption spectrometer. Take the absorbance of barium obtained from the test as the abscissa, and take the sulfate content as the ordinate to obtain Ba—SO 4 working curve, see image 3 . Finally, the sample filtrate was tested with an atomic absorption spectrometer for the absorbance of barium to be 0.037. According to Ba—SO 4 The working curve was checked to find that the ...

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Abstract

The invention provides a method for detecting the trace sulfate radical content in cobalt chloride, and the method has the advantages of being short in process, easy and convenient to implement, high in detection limit and capable of precisely detecting the trace sulfate radical content in the cobalt chloride. The advantages are achieved according to the scheme that the method for detecting the trace sulfate radical content in the cobalt chloride includes the steps that cobalt chloride required to be detected is changed into a cobalt chloride solution by adding water to the cobalt chloride, a barium chloride solution is added to the cobalt chloride solution continuously till no sediment is generated, then the solution is filtered, and filter liquor is obtained. The method is simple in process, short in process time and low in detection limit; the detection precision and accuracy are considered while cobalt matrix interference is eliminated; the method for detecting the trace sulfate radical content in the cobalt chloride is mainly creative on the aspect of the combination of the detection steps.

Description

technical field [0001] The invention relates to the field of chemical detection of nonferrous metals, in particular to a detection method for trace sulfate content in cobalt chloride. Background technique [0002] Cobaltous chloride, commonly known as cobalt chloride, cobalt dichloride or cobalt chloride (II), chemical formula is CoCl2; the main purpose is to prepare cobalt oxide and metal cobalt as alloy materials for electronic materials, and a small amount is used to make barometers , hydrometer, hidden ink, etc. Cobalt chloride paper is blue when dry and turns pink when wet. Adding a certain amount of cobalt chloride to silica gel can indicate the degree of moisture absorption of silica gel, and is often used in dry storage. As a basic industrial product, cobalt chloride products are also widely used in various industries such as paint drier, ceramic glaze and compound feed. Especially as an important raw material for batteries, with the rise of lithium-ion batteries ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
Inventor 宋玉刘淑媛严楼杨
Owner TIANJIN MAOLIAN SCI & TECH
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