Identification of sulfur interferences during organotin determination in harbour sediment samples by sodium tetraethyl borate ethylation and gas chromatography-pulsed flame photometric detection

MANUEL ANDRES BRAVO MERCADO, Gäetane Lespes, Ida De Gregori, Hugo Pinochet, Martine Potin-Gautier

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

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 NaBEt 4 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.

Original languageEnglish
Pages (from-to)217-224
Number of pages8
JournalJournal of Chromatography A
Volume1046
Issue number1-2
DOIs
StatePublished - 13 Aug 2004
Externally publishedYes

Keywords

  • Harbour sediments
  • Liquid-liquid extraction
  • Organotin compounds
  • Sulfur

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