Method for determining sodium chloride in industrial calcium chloride

A method of determination, the technology of calcium chloride, applied in the field of inspection and testing, can solve the problems of many factors affecting the accuracy, and achieve the effect of shortening the analysis cycle, reducing the cost of analysis, and reducing the amount of use

Inactive Publication Date: 2017-11-21
ANGANG STEEL CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the analysis method of sodium chloride in industrial calcium chloride is "using potassium chromate as indicator, titrating the total chlorine with silver nitrate standard titration solution, subtracting the chlorine content in calcium chloride and magnesium chloride, and then converting it into chlorine chloride. Sodium content" is a chemical method for indirect measurement, and the accuracy of the results is affected by many factors. There is no report on the determination of sodium chloride content in industrial calcium chloride by inductively coupled plasma atomic emission spectrometry

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  • Method for determining sodium chloride in industrial calcium chloride
  • Method for determining sodium chloride in industrial calcium chloride
  • Method for determining sodium chloride in industrial calcium chloride

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Embodiment 1

[0035] A kind of determination method of sodium chloride in industrial calcium chloride adopts the inductively coupled plasma atomic emission spectrometer to measure the content of sodium chloride in industrial calcium chloride, and realizes according to the following steps:

[0036] 1. Crucible drying: Dry a glass sand crucible with a filter plate pore size of 5 μm-15 μm in an oven at 105°C-110°C until the quality is constant;

[0037] 2. Prepare sample solution: Weigh 0.25 sample, put it in a 100ml beaker, add 20ml reverse osmosis pure water to dissolve, filter the solution with a sand crucible, collect the filtrate and put it in the beaker, and wash the crucible repeatedly with 10ml reverse osmosis pure water For insoluble matter, wash until there is no chloride ion in the filtrate; the determination method for washing until there is no chloride ion in the filtrate: take 5ml of washing liquid, add 5ml of silver nitrate solution with a concentration of 20g / L, mix well, and le...

Embodiment 2

[0058] A kind of determination method of sodium chloride in industrial calcium chloride adopts the inductively coupled plasma atomic emission spectrometer to measure the content of sodium chloride in industrial calcium chloride, and realizes according to the following steps:

[0059] 1. Crucible drying: Dry a glass sand crucible with a filter plate pore size of 5 μm-15 μm in an oven at 105°C-110°C until the quality is constant;

[0060] 2. Prepare sample solution: Weigh 0.25 sample, put it in a 100ml beaker, add 10ml (1:1) dilute nitric acid solution to dissolve the sample, then add 20ml reverse osmosis pure water to obtain a sample solution for the determination of chlorination sodium content;

[0061] 3. Preparation of blank solution: no sample is added, and the others are the same as in step 2 to obtain a blank solution;

[0062] 4. Prepare standard series sample solutions:

[0063] (1) Prepare 1000 μg / ml sodium standard solution (outsourced national sodium standard solut...

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Abstract

The present invention relates to a method for determining sodium chloride in industrial calcium chloride. According to the method, the sodium chloride content in industrial calcium chloride is determined by using an inductively coupled plasma atom emission spectrometer; and the method comprises: 1, drying a crucible, 2, preparing a sample solution, 3, preparing a blank solution, 4, preparing a series of standard sample solutions, 5, drawing a standard working curve, 6, determining the sodium contents in the sample solution and the blank solution, and 7, calculating the sodium chloride content in industrial calcium chloride through the following formula. According to the present invention, with the method, the analysis cycle is shortened, the labor intensity is reduced, the quality process control on the analysis result is improved, the laboratory analysis means is developed, the detection capability is improved, the consumption of chemical reagents is reduced, the waste liquid emission is reduced, the analysis cost is reduced, and other advantages are provided.

Description

technical field [0001] The invention relates to a detection and testing technology, in particular to a method for determining sodium chloride in industrial calcium chloride. Background technique [0002] Calcium chloride is an important chemical raw material, which can be divided into industrial grade calcium chloride and food grade calcium chloride. Industrial grade calcium chloride has the characteristics of heating when it meets water and has a low freezing point. It can be used as a desiccant, dehydrating agent, Building antifreeze, etc., has a wide range of uses. At present, the analysis method of sodium chloride in industrial calcium chloride is "using potassium chromate as indicator, titrating the total chlorine with silver nitrate standard titration solution, subtracting the chlorine content in calcium chloride and magnesium chloride, and then converting it into chlorine chloride. Sodium content" is a chemical method for indirect measurement, and the accuracy of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/71G01N1/28
CPCG01N21/71G01N1/28
Inventor 张道光王丽晖高巍赵立章李奎
Owner ANGANG STEEL CO LTD
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