Determination of impurities in vanadium carbide by high-pressure acid decomposition/ICP-AES

摘要

In order to determine impurities (eleven elements) in vanadium carbide (VC) by in- ductively coupled plasma atomic emission spectrometry (ICP-AES), a sample dissolution procedure using acids was examined. After a 0.25g amount of vanadium carbide powder sample was taken in a Teflon pressure vessel, 2ml of nitric acid (1+1) and 2ml of hy- drofluoric acid (1+1) were added. The vessel was then sealed and kept at 160℃ in a drying oven.