Determination of Trace Sn in Unplastized Polyvinyl Chloride Pipes for Drinking Water Supply by GFAAS

Objective To find new methods to detect Sn in unplastized poly vinyl chloride pipes for drinking water supply.Methods L-Ascorbic acid is used as matrix modifier in the direct Zeeman GFAAS to determine trace Sn.Results The method detection limit is 9.3pg.The recovery is 94.0%-101.0%.The RSD obtained from the data of 11 determinations at the concentration level of 6.0 g/L is 4.6%.Conclusion This method is simple,quick,accurate and sensitive.It is a very good methods for measuring Sn in unplastized poly vinyl chloride pipes for drinking water supply.