C. Montigny et al., MATRIX EFFECTS AND SELECTIVITY OF THE DETECTOR IN THE DETERMINATION OF BUTYLTIN AND PHENYLTINS BY GAS-CHROMATOGRAPHY FLAME PHOTOMETRIC DETECTION, Journal of chromatography, 819(1-2), 1998, pp. 221-230
Citations number
41
Categorie Soggetti
Chemistry Analytical","Biochemical Research Methods
Two main types of matrix effects were observed during the analysis of
environmental samples by ethylation with sodium tetraethylborate-gas c
hromatography-flame photometric detection: the first one was a disturb
ance of the GC signal such as baseline discontinuity or decrease of ph
otometric emission and the second one variations of the organotin resp
onses. For the GC signal, organic matter dissolved after acidic extrac
tion was found to be mainly responsible. It was possible to reduce the
se effects significantly by the removal of organic matter by centrifug
ing and pH control. The variations of the organotin responses were mor
e difficult to resolve. But it was possible to obtain a reliable quant
ification using simultaneously standard addition and internal standard
methods. The flame photometer appeared sufficiently selective in rega
rd to other selective detectors. However, it was confirmed that sulfur
compounds could give a photometric signal at 610 nm. This emission wa
s not a problem for organotin quantification because no coelution of i
nterfering species and analytes was observed. The application of this
method to different complex samples such as sediments, biota or sewage
sludge has finally confirmed its suitability for pollution control in
the environment. (C) 1998 Elsevier Science B.V. All rights reserved.