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Acta Chimica Sinica ›› 1964, Vol. 30 ›› Issue (3): 330-335. Previous Articles     Next Articles

羟基羧酸在螯合滴定中的应用——Ⅰ.以乳酸隐蔽锡(Ⅳ)及锡的滴定

陈永兆, 萧锦荣, 方仲根   

  1. 中山大学化学系
  • 投稿日期:1963-09-13 发布日期:2013-06-03

THE USES OF HYDROXY ACIDS IN CHELATOMETRY——Ⅰ.THE MASKING OF TIN(Ⅳ)WITH LACTIC ACID AND THE INDIRECT TITRATION OF TIN

CHEN YUNG-CHAO, HSIAO CHIN-YUNG, FANG CHUNG-GIN   

  1. Chemistry Department, Sun Yat-Sen University
  • Received:1963-09-13 Published:2013-06-03

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By means of preliminary experiments, lactic acid has been found to be a good masking agent for tin(Ⅳ), titanium(Ⅳ) and antimony(Ⅴ) in EDTA titrations.With the use of 10 ml of 1:5 (v/v) lactic acid solution, up to 100 mg (or 200 mg) of tin can he masked without interfering with the titration of lead (or zinc) at ca.pH 5.5 with xylenol orange as indicator.