GB/T 33948.1-2017: Translated English of Chinese Standard. (GBT 33948.1-2017, GB/T33948.1-2017, GBT33948.1-2017): Method for chemical analysis of copper-steel composite metal - Part 1: Determination of copper content - Iodine titration method
This Part of GB/T 33948 specified the determination method of copper content in copper-steel composite metal. This Part applies to the determination of copper content in copper-steel composite metal. The determination range is 4.00% ~ 25%.
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Calculation of analysis results
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400mL beaker 500 mL conical acetone actual concentration Add 10 mL add 5 mL ammonium bifluoride saturated analysis of copper-steel bifluoride saturated solution blank test completely dissolved solution concentration of sodium consistent when preparing consumed to titrate content in copper-steel copper content copper standard solution copper-steel composite metal Determination of copper GB/T Glacial acetic acid glass and glass glass wall hydrochloric acid 3.2 Hydrogen peroxide iodide solution 3.6 liter mol/L low temperature milliliters mL mL at low mL conical beaker mL of nitric mL of potassium mole g/mol nitric acid 3.1 obtained under reproducibility Parallel calibration potassium iodide solution Remove for cooling saturated solution 3.9 Shake sodium thiosulfate standard solution is transparent standard titration solution starch solution 3.10 test material 5.1 thiosulfate standard solution thiosulfate standard titration titrate with sodium titration solution 3.13 titration solution consumed transparent without impurities volume of sodium wall with water Wash the watch watch glass