Analytical Sciences

Abstract − Analytical Sciences, 14(6), 1121 (1998).

Marine Sediment Certified Reference Material for TinSpeciation
Jun YOSHINAGA*, Hiroyuki KON*, ToshihiroHORIGUCHI*, Masatoshi MORITA* and KensakuOKAMOTO**
*National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki305, Japan
**National Institute of Materials and Chemical Research, Higashi,Tsukuba, Ibaraki 305, Japan
A certified reference material for organotin analysis(NIES CRM No. 12 Marine Sediment) was prepared at National Institute forEnvironmental Studies. The starting material was a surface sediment sampledat the center of Tokyo Bay in 1989. The chemical and physical properties ofthe material indicated homogeneity of this CRM at practical level.Certified values are given for tributhyltin (0.19+-0.03 mg TBT/kg dry wt.)and total tin (10.7+-1.4 mg/kg dry wt.) contents and a reference value fortriphenyltin (0.008 mg TPT/kg dry wt.) based on the analytical results fromcollaborative analysis. The organotin levels in this CRM are higher thanthe current average level of, but within the range of, TBT and TPT found inmarine sediment along the Japanese coast. This CRM will be of practicalvalue in the quality assurance of organotin analysis in marineenvironmental monitoring programs. (Keywords: Marine sediment, organotin, total tin, certifiedreference material)