Determination of Arsenic in Tin Smelting Slag by The Molybdoantimonyarsenate Blue Spectrophotometric Method

摘要

The key step is improved the national standards-the molybdoantimonyarsenate blue spectrophotometric method for the determination of arsenic content in tin smelting waste residue. The experimental results show that on the basis of GB/T 1819.5-2004, the reaction acidity instead 2.0 mol/L, tartaric acid 10 mL, coloration in water bath 20 min, then colorimetric at wavelength of 850 nm are the optimal conditions for determination. Using three samples of tin slag smelting arsenic verification of these conditions, precision and accuracy are good, the relative standard deviations are 0.91%, 1.35%, 1.07%, the recoveries are 100.01%, 99.73%, 99.98%, respectively.