Specification of Butyltins and Methyltins in Seawater and Marine Sediments by Hydride Derivatization and Atomic Absorption Detection.
Abstract
A sensitive and selective speciation method for direct determination of butyltins in seawater and marine sediments has been developed from published methods previously discussed in scientific literature. Monobutyltin, dibutyltin, and tributyltin may be detected in natural seawater samples at concentrations below 0.01 microgram/liter. Sample stability during frozen storage in polycarbonate plastic containers were evaluated and found to be consistent over a 100-day storage period. Analysis of seawater samples by standard additions has compared well with butyltin concentrations, determined by callibration curve calculations in samples collected from open harbor sites. Less agreement between standard addition and calibration curve calculation of butyltin concentrations was seen when marine sediments were analyzed by direct borohydride derivatization. Greater problems with sample homogeneity and potential matrix interferences from high hydrocarbon and sulfide concentrations complicate marine sediment analysis. Some form of a sample pretreatment may be necessary to better determine butyltin concentrations in complex marine sediments. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1985
- Accession Number
- ADA161872
Entities
People
- A. O. Valkirs
- G. Vafa
- P. F. Seligman
- P. M. Stang
- V. Homer