【摘要】 以硝酸分解试样，在硫酸介质中以盐酸—氢溴酸挥发除去锡、砷、锑、铅呈硫酸铅沉淀，再以钼酸钠喹啉沉淀，沉淀经过量的氢氧化钠溶解，稀硝酸滴定。更多还原

【Abstract】 Samples are dissolved with nitric acidTin ,arsenic and antimony are eliminated by vaporization with hydrochloric acid/hydrobromic acid in sulphuric acid medium,and lead is precipitated as lead sulphate.Sodium molydate and quinoline are then added to precipitate phosphorus.The precipitate is dissolved with excessive sodium hydroxide and then titrated with diluted nitric acid.更多还原