Accession Number : ADA161872


Title :   Specification of Butyltins and Methyltins in Seawater and Marine Sediments by Hydride Derivatization and Atomic Absorption Detection.


Descriptive Note : Interim technical rept. Jan 83-Mar 85,


Corporate Author : NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA


Personal Author(s) : Valkirs,A O ; Seligman,P F ; Vafa,G ; Stang,P M ; Homer,V


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a161872.pdf


Report Date : Jul 1985


Pagination or Media Count : 44


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)


Descriptors :   *ORGANOMETALLIC COMPOUNDS , *TIN COMPOUNDS , COMPUTATIONS , DETECTION , METHYL RADICALS , GRAPHS , SITES , FREEZING , HYDROCARBONS , SAMPLING , BUTYL RADICALS , CONTAINERS , CALIBRATION , ABSORPTION , STORAGE , ABSORPTION SPECTRA , ATOMIC PROPERTIES , PLASTICS , SEA WATER , DETERMINATION , SEDIMENTS , POLYCARBONATES , HARBORS , OCEAN BOTTOM , SCIENTIFIC LITERATURE , CURVED PROFILES , BOROHYDRIDES , CHEMICAL DERIVATIVES , CHEMICAL OCEANOGRAPHY


Subject Categories : Physical and Dynamic Oceanography
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE