Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Determination of Copper, Lead, Cadmium and Zinc in Water by Square Wave Polarography with Dithizone-Chloroform Extraction Method

디티존-클로로포름 抽出, 短形波폴라로그래피에 의한 물중의 구리, 납, 카드뮴 및 아연의 定量

  • Su-Chan Moon (Department of Chemistry, College of Libral Arts and Science, Busan National University)
  • 문수찬 (부산대학교 문리과대학 화학과)
  • Published : 1975.12.30
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Abstract

500 ml of a sample water was extracted with 10 ml of 0.01 % dithizone-$CHCl_3$three times. When $CHCl_3$ layer was back extracted with 10 ml of 0.1 N HCl containing mercuric ion, the free metal ions come into aqueous layer. The aqueous layer was added with 2 ml of 2 N KCl and was washed with 10 ㎖ of $CHCl_3$two times in order to remove the trace dithizone, and then was recorded square wave polarogram. The concentration of copper, lead and cadmium can be determined up to 3 ppb and that of zinc up to 14 ppb with an error of 10 %.

물중에 ppb 정도로 존재하는 구리, 납, 카드뮴 및 아연을 동시에 정량하기 위하여 디티존-클로로포름 抽出法으로 농축하여 短形波폴라로그래피法으로 측정하는 방법을 검토했다.디티존鹽으로 클로로포름層에 추출된 이들 이온을 , 디티존보다 약간 과량의 수은(II)이온을 함유하는 염산으로 역추출한 후 支持電解質로서 염화칼륨을 가하고 순수한 클로로포름으로 두번 씻은 다음 短形波폴라로그램을 기록한다. 이 방법으로 구리, 납 및 카드뮴은 3ppb까지, 아연은 14ppb까지 상대오차 10%이내로 할 수 있었다.

Keywords

References

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