Continuous Preconcentration of Sn2+/Sn4+ by the On-line Sulfide Precipitation-Dissolution

Bulletin of the Korean chemical society

Pyung Heum Yeon¹  Sang-ho Nam¹  Yong-Nam Pak¹  Young-Suk Yoon¹  Se-Woung Oh¹ 

关键词: Preconcentration;    Sn2+/Sn4+ speciation;    ICP;    Sulfide precipitation;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

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. Sn2+/Sn4+ 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.

【 授权许可】

Unknown