Method for measuring content of arsenic element in solid slag produced by chemical rhenium precipitation

• Main Authors: XU CHENXI, TANG HUI, MU XIUMEI, LUO CAIPING, LIU BO, ZHENG WENYING, ZHANG JIAN, WANG CHUANFEI, YUN APENG, YANG JUAN, JIN TAO, LI RUILING
• Format: Patent
• Language: Chinese; English
• Published: 09.09.2022
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method for determining the content of arsenic element in solid slag produced by chemical rhenium precipitation, which comprises the following steps: putting the solid slag produced by chemical rhenium precipitation into a container, adding potassium chlorate and nitric acid, heating, adding a sulfuric acid solution, heating, evaporating to dryness, purging the wall of the container with water, and boiling to obtain a mixed solution; mixing the mixed solution with potassium bromide, hydrazine sulfate and hydrochloric acid, distilling, and absorbing the distilled fraction with water to obtain an absorbed solution; heating the absorbed solution, dropwise adding methyl orange, titrating by using a potassium bromate standard titration solution, and ending the titration when the solution red disappears; carrying out a blank experiment along with solid slag produced by chemical rhenium precipitation; according to the volume of the potassium bromate standard titration solution consumed at th