Identification of sulfur interferences during organotin determination in harbour sediment samples by sodium tetraethyl borate ethylation and gas chromatography-pulsed flame photometric detection.
Because of the high toxicity of organotin compounds and the current regulation about their applications, analytical method usable in routine analysis is required. A speciation procedure based on NaBEt4 ethylation and GC-PFPD analysis has shown to be suitable for the organotin determination. Unfortunately, some matrix effects were observed during the analysis of harbour sediments from Chile. These effects were identified as the alkylation of elemental sulfur and the coelution between the organotin compounds and some dialkylsulfides. The re-optimization of GC parameters and application of solid phase microextraction (SPME) were proposed to solve these analytical problems. Certified reference materials and different harbour sediment samples were analysed in order to evaluate the suitability of the methods for organotin control in complex environment samples.
Bravo
Manuel
M
Laboratoire de Chimie Analytique, Bioinorganique et Environnement, Université de Pau et des Pays de L'Adour, UMR CNRS 5034, Avenue de l'Université, 64013 Pau, France.
Lespes
Gäetane
G
De Gregori
Ida
I
Pinochet
Hugo
H
Potin-Gautier
Martine
M
D001881:Borates / Q000737:chemistry*; D002849:Chromatography, Gas / Q000379:methods*; D019015:Geologic Sediments / Q000737:chemistry*; D009947:Organotin Compounds / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry*
D001881:Borates; D009947:Organotin Compounds; C080440:sodium tetraethylborate; D013455:Sulfur