METHOD FOR DETERMINATING VERY SMALL AMOUNT OF SELENIUM IN GLASS

摘要

PROBLEM TO BE SOLVED: To provide a method for analyzing selenium in glass by preventing the loss of selenium caused by volatilization and adsorption in a process of pretreatment such as the decomposition, separation or the like of a glass sample. SOLUTION: The glass sample is melted by alkali and the molten sample is dissolved in hydrochloric acid. Hydrofluoric acid is further added to the dissolved sample to decompose collidal silica in the molten sample to obtain a solution and, after this solution is allowed to stand to cool, a tellurium solution and a reducing agent are added to the solution as a coprecipitant to heat the solution to sediment selenium. This selenium is filtered and separated while the separated matter is analyzed by inductively coupled plasma emission spectroscopy. COPYRIGHT: (C)2005,JPO&NCIPI