DCS-偶氮胂分光光度法测定钍的研究及应用──稀土精矿中微量钍的测定

Study of Color Reaction of Th with DCS-Arsenazo and Its Application --Determination of Trace Thorium in Rare Earth Mineral

ＤＣＳ－偶氮胂分光光度法测定钍的研究及应用稀土精矿中微量钍的测定王木林１张晓君１刘宏２（１．内蒙古大学化学系，０１００２１，呼和浩特；２．内蒙古药品检验所，０１００２５，呼和浩特）关键词钍ＤＣＳ－偶氮胂分光光度ＫｅｙｗｏｒｄｓＴｈｏｒｉｕｍＤＣＳ－Ａ...

That thorium forms a purple complex with DCS Arsenazo in the presence of hydrochloric acid is showed.With λ max =632nm and ε =9.4×10 4.A new spectrophotomatric method for separation of Tr by ion exchange is used for determination of trace amounts of thorium in rare earth minerals.