Variations in concentrations of methyltin compounds and inorganic tin inspartina alternifloraand porewater in the great bay estuary (NH) during the 1991 growing season

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Abstract
Weekly determinations of methyltin and inorganic tin concentrations in Spartina alterniflora and surrounding porewater in the Great Bay Estuary (NH) during the 1991 growing season demonstrate that in all samples inorganic tin concentrations are much higher than methyltin concentrations. Monomethyltin appeared regularly in S. alterniflora samples. Dimethyltin occurred occasionally in the plants and regularly in porewater samples. The concentration trend of monomethyltin in parts of S. alterniflora and porewater is: roots > leaves ∼ rhizomes > porewater. The concentration of monomethyltin ranges from 1.17 to 30.6 ng g‐1 in leaves, from undetected to 80.6 ng g‐1 in roots, from undetected to 43.4 ng g‐1 in rhizomes, and from undetected to 2.61 ng g‐1 in porewater. Inorganic tin appeared in all samples with the concentration order: roots > rhizomes > leaves > porewater. There is no strong temporal trend for monomethyltin or inorganic tin in any sample type.