1998 Volume 14 Issue 6 Pages 1121-1125
A certified reference material for organotin analysis (NIES CRM No. 12 Marine Sediment) was prepared at National Institute for Environmental Studies. The starting material was a surface sediment sampled at the center of Tokyo Bay in 1989. The chemical and physical properties of the 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 for triphenyltin (0.008 mg TPT/kg dry wt.) based on the analytical results from collaborative analysis. The organotin levels in this CRM are higher than the current average level of, but within the range of, TBT and TPT found in marine sediment along the Japanese coast. This CRM will be of practical value in the quality assurance of organotin analysis in marine environmental monitoring programs.
