T. Desmaele et al., CAPILLARY GAS-CHROMATOGRAPHY ICP MASS-SPECTROMETRY - A POWERFUL HYPHENATED TECHNIQUE FOR THE DETERMINATION OF ORGANOMETALLIC COMPOUNDS, Fresenius' journal of analytical chemistry, 355(7-8), 1996, pp. 778-782
The development and improvement of agas chromatography inductively cou
pled plasma mass spectrometry system, CC-TCP-MS, is described. The GC
and ICP-MS are coupled with a heated stainless steel transfer line. Xe
. present in the GC carrier gas, is used to facilitate the nebuliser g
as flow rate setting and the positioning of the torch. Alkyltin compou
nds are separated by GC using a 30 m capillary column within 9 min. Th
e necessity of applying double internal standardisation (use of Bu(3)P
eSn and Xe gas as internal standards) is shown. The repeatabilities al
50 mu g/l concentration for both retention time and Feal; are better
than 0.25% and 5%, respectively. The detection limits for alkyltin com
pounds are better than those of existing methods and range between 15
and 35 fg Sn. Finally GC-ICP-MS is applied to the determination of mon
o-, di- and tributyltin in some harbour waters, after extraction and G
rignard derivation with PrMgCl. Concentrations between 1 and 20 ng/l a
re found.