Tetraethyltin determination

Temperature programming packed-capillary and open capillary HTLC-ICP-MS (up to 200 °C) has been reported [738]. //.HTLC-ICP-MS instrumental coupling has been applied to organotin (tetraethyltin, tributyltin chloride and triphenyltin chloride) and organolead (tetramethyllead and tetraethyllead) compounds [756]. HTLC-ICP-MS can be used for the determination of organometallic compounds at low concentrations. The observed limit of detection (LOD) was 5pg for Pb in... 

Abraham and Spalding16 have shown that tetraethyltin reacts with mercuric iodide in solvent 96 % methanol -4 % water by the rate-determining bimolecular reaction (8), followed by the rapid, reversible reaction (9), viz. 

They also observed44 that for the above solvents there was a linear relation between X and log [k(Me)/k(Et)], where k(Me)/7c(Et) denotes the relative reactivities of tetramethyltin to tetraethyltin towards a given electrophile. For a number of solvents, the absolute values of rate coefficients were not determined and values of X were calculated from the above linear relationship44, 52. These indirectly determined (X ) values are... 

Colby ei al. [219] used laser ionisation gas chromatography-mass spectrometry to determine tetraethyltin in non saline water with a detection limit of 2.5pg L 1 as Et4Sn or 1.5fg absolute as EfSn. 

Reactions of tetra-alkyltin compounds with mercury(n) iodide in 96% methanol, as with mercury(n) chloride, - are bimolecular. The variation of rate constant with alkyl group suggests an open S 2 transition state (5). Further evidence for this mechanism is provided by the variation of rate constant with solvent Y values for the particular case of the tetraethyltin compound reacting with mercury(n) chloride in a range of aqueous methanol mixtures. Solvent effects in this last series of reactions have been separated into initial state and transition state contributions by the determination of heats of solution and of transfer of the reactants. The effect of added lithium perchlorate on reaction rates for tetra-alkyltin compounds with mercury(ii) iodide again indicates bimolecular electrophilic... 

Jeltes has discussed the determination of bis (tributyltin) oxide in air by atomic absorption spectroscopy and pyrolysis gas chromatography. Luskina and Syavtsillo have described procedures for the determination of tetraethyltin and tetrabutyltin in air and in water. Smith has discussed the determination of tin in organisms and in water. 

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