Abstract
The sample was dissolved in hydrochloric and nitric acid mixture and tin was separeted as hydroxide in an ammoniacal ammonium chloride medium. Then, the precipitated hydroxides were dissolved in hydrochloric acid and tin was determined polarographically in 1 mol hydrochloric acid-4 mol ammonium chloride solution. As lead in samples was partially coprecipitated with tin and the lead wave overlapped the second tin wave, the coprecipitated lead was estimated separately in an ammoniacal tartarate medium and subtracted.
