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The thallium content in Al Tl alloys,thallides and thallium sulfate are selectively determined by chelato metry with aminourea hydrochloride used as the reasling agent. 本文提出以盐酸氨基脲作释放剂,选择性螯合滴定法测定铅铊合金、铊化物和硫酸铊中的铊含量。