Method for measuring copper smelting smoke indium
A measurement method and copper smelting technology, which is applied in the field of chemical detection, can solve the problems of increasing system analysis errors, complicated and lengthy analysis process, and many reagents, and achieve the effects of accurate measurement results, good importance, and simple operation
Inactive Publication Date: 2014-08-13
广东金雁工业集团有限公司
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[0004] Existing problems in the extraction graphite furnace atomic absorption method: this method uses many reagents, the cost is high, and the analysis process is complicated and lengthy, which is easy to increase the system analysis error, especially the use of organic reagents causes poor operating environment
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[0019] The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments, but this does not constitute any limitation to the present invention.
[0020] 1. Specific measurement method
[0021] 1. Reagents
[0022] Analytical pure nitric acid, analytical pure hydrochloric acid, hydrochloric acid (1+1), sulfuric acid (1+1).
[0023] Hydrochloric acid (1+1) means: the volume ratio of water to analytically pure hydrochloric acid is 1:1;
[0024] Sulfuric acid (1+1) means: the volume ratio of water to analytically pure sulfuric acid is 1:1.
[0025] Indium standard solution: Weigh 0.1000g of metal indium into a 150ml volumetric flask, add 10ml of HCl (1+1), 10ml of H2SO4 (1+1), heat to dissolve, evaporate until white smoke of sulfur trioxide is emitted, and dissolve in water after cooling , Transfer to a 1L volumetric flask, dilute to volume with water, this solution contains indium 0.1mg / ml.
[0026] 2. Instrume...
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The invention provides a method for measuring copper smelting smoke indium, wherein the method has the advantages of simplicity and fastness in operation, exact measuring result and low cost and belongs to the technical field of chemical detection. The technical points are as follows: the method comprises the following steps of: 1) preparing a 0.1mg / ml standard indium solution containing indium; 2) measuring a sample: putting 0.2-1.0 g of sample in a beaker, adding 9 ml of analytical pure hydrochloric acid (HCl) and 3 ml of analytical pure nitric acid, heating to dissolve and evaporate nearly dry, and adding 3 ml of HCl(1+1) and 1 ml of H2SO4(1+1), heating to dissolve, transferring the solution into a 50 ml volumetric flask after the solution is cooled, diluting the solution to a scale by using water, and shaking up; after the solution is classified or filtered, spraying and measuring at wavelength 303.9 by an atomic absorption spectrometer; 3) drawing a working curve; and 4) calculating.
Description
technical field [0001] The invention relates to a method for measuring indium, in particular to a method for measuring indium in copper smelting dust; it belongs to the technical field of chemical detection. Background technique [0002] The content of indium in the earth's crust is 1×10 -5 %, although it also has independent minerals, copper sulfide (CuInS 2 ), pyridinite (FeInS 4 ), indium water [In(OH) 3 ], but the amount is very small. Most of the indium is dispersed in other minerals, mainly sulfur-containing lead and zinc minerals. The content of indium in sphalerite is 0.0001% to 0.1%. [0003] The classic indium determination method is the extraction graphite furnace atomic absorption method, and its operation steps are: (1) Accurately pipette an appropriate amount of water sample (indium content is less than 0.4μg) into a beaker, add 0.5mL of ferric chloride solution, 5mL of concentrated hydrochloric acid , when evaporated to about 5mL on the electric hot plate,...
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IPC IPC(8): G01N21/31
Inventor 董志杰骆黎明何溢
Owner 广东金雁工业集团有限公司