Chemometric optimization of an extraction procedure using tartaric acid for butyltin compounds from sediment samples by GC-PFPD

MANUEL ANDRES BRAVO MERCADO, Marcos Flores, Sonnia Parra, Waldo Quiroz, Paulette Maxwell, Zoltán Mester

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

In this study a simple extraction procedure was developed to minimize the sulfur interferences on the determination of butyltin in sediment samples based on extraction with tartaric acid solution. The optimal conditions were determined using an experimental design methodology and these were achieved using a solution of tartaric acid (0.5 M) with methanol (30% v/v) for 12 hours in an orbital shaker. This protocol could be followed by a liquid-liquid extraction and this organic phase can be analyzed directly by gas chromatography with pulsed flame photometric detection (GC-PFPD) without any further cleanup due to interferences from elemental sulfur were completely eliminated. The accuracy of the procedure was verified analyzing two reference materials (CRM) (BCR-646, freshwater sediment and PACS-2, marine sediment) and comparing the results to the certified values, the optimized method produced satisfactory results certified values in the CRMs. Finally, harbour sediment samples were analyzed in order to evaluate the suitability of the method for organotin control in complex environmental samples containing high concentrations of sulfur compounds.

Original languageEnglish
Pages (from-to)2803-2806
Number of pages4
JournalJournal of the Chilean Chemical Society
Volume60
Issue number1
DOIs
StatePublished - 1 Mar 2015
Externally publishedYes

Keywords

  • Butyltin extraction
  • Experimental design
  • Photometric pulsed flame photometric detection (PFPD)
  • Sulfur interferences

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