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Method for measuring arsenic in sulfate slag

A determination method, technology of sulfuric acid slag, applied in the field of analytical chemistry, can solve problems such as poor operation, low analysis results, cumbersome sample dissolution, absorption and colorimetry, etc., to achieve improved accuracy, good analysis precision, and high accuracy Effect

Inactive Publication Date: 2010-09-15
武钢集团有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a simple, fast and easy-to-operate analysis method for arsenic in sulfuric acid slag, which solves the cumbersome operation process of sample dissolution, absorption and colorimetry in the original method and the analysis of high-content arsenic. Not good, the analysis result tends to be low

Method used

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specific Embodiment

[0024] Using the above technical scheme, weigh 0.5000g of the arsenic in the three sulfuric acid slag samples into a 250mL glass beaker, add 100mL of aqua regia, dissolve the sample completely on the medium and high temperature electric hotplate, and place the sample in a 50mL volumetric flask. The measurement and standard addition recovery test were carried out in, and the results are shown in Table 1.

[0025] Table 1-Analysis results of electric heating plate dissolved samples

[0026] sample

[0027] At the same time, 0.5000 g of the above three samples were weighed, and the samples were digested and dissolved with microwave for determination and standard addition recovery tests. The results are shown in Table 2.

[0028] Table 2-Analysis results of microwave digestion samples

[0029] sample

[0030] It can be seen from Tables 1 and 2 that the method of the present invention has high accuracy and precision, and can well meet the analysis needs of scientific research and pro...

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Abstract

The invention relates to a method for measuring arsenic in sulfate slag. An aqua regia sample is adopted and the method comprises the following steps of: weighing pure iron equivalent to iron in the sample in quantity, performing matrix matching by adopting iron base, preparing standard solution of a working curve with effectively eliminating the base interference of the iron base, selecting an analysis spectral line of the arsenic in the sulfate slag by using the conventional inductive coupling plasma spectrograph in a control laboratory, measuring the working curve and the spectral intensity of the arsenic in the test solution on the inductive coupling plasma emitting spectrograph, and directly obtaining the analysis result of the sample by automatic regression calculation of a computer. The method solves the problems of fussy operating process of sample dissolution, absorption and color comparison in the conventional method, poor analysis and operation of high content arsenic and lower analysis result.

Description

Technical field [0001] The invention relates to the technical field of analytical chemistry, in particular to a method for determining arsenic in sulfate slag. Background technique [0002] Sulfuric acid slag is a solid waste of the sulfuric acid industry. It is a kind of waste slag discharged during the production of sulfuric acid using pyrite or sulfur-containing tailings as raw materials. The comprehensive utilization of sulfuric acid slag can not only eliminate its harm to the environment, but also be used as a resource. Millions of tons of sulphuric acid slag are discharged every year in our country. At present, some countries have achieved full utilization, and the utilization in my country is only about 50%. Sulphuric acid slag can be used as raw material for ironmaking, recycling non-ferrous metals and rare precious metals, making cement, etc. Therefore, it is a very valuable raw material and is of great significance to the comprehensive utilization of sulphuric acid sla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N1/44
Inventor 闻向东文斌朱缨魏继红张前香赵希文沈金科
Owner 武钢集团有限公司
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