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Speciation of methyltins by dispersive liquid–liquid microextraction and gas chromatography with mass spectrometry
Author(s) -
Smitiene Vaida,
Semasko Ivona,
Vickackaite Vida
Publication year - 2014
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201400074
Subject(s) - derivatization , chromatography , disperser , extraction (chemistry) , chemistry , mass spectrometry , solvent , analyte , gas chromatography , gas chromatography–mass spectrometry , analytical chemistry (journal) , materials science , organic chemistry , composite material
Dispersive liquid–liquid microextraction in combination with an in situ derivatization is suggested for methyltin compound sampling and preconcentration from water solutions. The derivatization was carried out with sodium tetraethylborate at pH 3. The effects of extraction and disperser solvents type, volume, and extraction time on the extraction efficiency were investigated. 1,2‐Dichlorobenzene was used as an extraction solvent and ethanol was used as a disperser solvent. The calibration graphs for all the analytes were linear up to 2 μg (Sn) L −1 , correlation coefficients were 0.998–0.999, LODs were 0.13, 0.05, and 0.06 ng (Sn) L −1 for trimethyltin, DMT, and monomethyltin, respectively. Repeatabilities of the results were acceptable with RSDs up to 12.1%. A possibility to apply the proposed method for methyltin compound determination in water samples was demonstrated.