Premium
Simultaneous determination of monomethylmercury, monobutyltin, dibutyltin and tributyltin in environmental samples by multi‐elemental‐species‐specific isotope dilution analysis using electron ionisation GC‐MS
Author(s) -
Moreno Maria Jimenez,
PachecoArjona Jaime,
RodríguezGonzález Pablo,
Preud'Homme Hugues,
Amouroux David,
Donard Olivier F. X.
Publication year - 2006
Publication title -
journal of mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1076-5174
DOI - 10.1002/jms.1120
Subject(s) - chemistry , tributyltin , isotope dilution , certified reference materials , environmental chemistry , methylmercury , chromatography , gas chromatography , sample preparation , mercury (programming language) , detection limit , analytical chemistry (journal) , mass spectrometry , bioaccumulation , computer science , programming language
Abstract In this work, the simultaneous determination of four organometallic species (monomethylmercury, monobutyltin, dibutyltin and tributyltin) in environmental samples by using a GC‐MS system with electron ionisation has been established. The measurement of isotope ratios in each species was accomplished by selecting the most adequate molecular cluster, and simple mathematical equations were applied to correct the contributions of 13 C from the organic groups attached to the tin and mercury atoms. The influence of different parameters such as dwell time on the precision and accuracy of the measured isotope ratios in each target species has also been studied. The determination and the sample preparation procedures presented in this work were first individually validated by analysing several certified reference materials for butyltin compounds (mussel tissue CRM‐477 and marine sediment SOPH‐1) and for monomethylmercury (tuna fish CRM‐464) using an innovative focused microwave technology for the extraction of the species from the solid samples. Additionally, the simultaneous determination of the four species was successfully validated by obtaining quantitative recoveries in spiked natural waters and by analysing the certified reference material BCR‐710 (certified in tributyltin and monomethylmercury). The values obtained in such certified tissue were fully in agreement not only with the certified mass fractions but also with the proposed indicative values for mono‐ and dibutyltin. Copyright © 2006 John Wiley & Sons, Ltd.