Bulletin of the Korean Chemical Society

  • 제25권8호
  • /
  • Pages.1156-1160
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  • 2004
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Continuous Preconcentration of Sn2+/Sn4+ by the On-line Sulfide Precipitation-Dissolution

  • Yeon, Pyung-Heum (Department of Chemistry, Korea National University of Education) ;
  • Yoon, Young-Suk (Department of Chemistry, Korea National University of Education) ;
  • Oh, Se-Woung (Department of Chemistry, College of Natural Sciences, Mokpo National University) ;
  • Nam, Sang-Ho (Department of Chemistry, College of Natural Sciences, Mokpo National University) ;
  • Par, Yong-Nam (Department of Chemistry, Korea National University of Education)
  • 발행 : 2004.08.20
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초록

The technique of an on-line preconcentration by the direct sulfide precipitation has been developed. Sn was homogeneously precipitated by sulfide, which was generated in situ from the hydrolysis of thioaceteamide. Precipitate was collected on a filter in the line and dissolved out instantaneously by KOH to be sent to an ICP. The enrichment factor was 4 with the sampling speed of 15/hr for 1.0 mL of sample. It was increased to more than 40 times when the sampling volume was increased to 10 mL with the sampling speed of 5/hr. $Sn^{2+}/Sn^{4+}$ could be separately determined with the on-line precipitation technique. The method was applied to the analysis of NIST SRM 1566 Oyster sample and yielded good agreement with the certified value.

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