Determination of organotins in aquatic plants by headspace SPME followed by GC-PFPD determination

• Published in: International journal of environmental analytical chemistry Vol. 86; no. 10; pp. 733 - 742
• Main Authors: El Ati-Hellal, Myriam, Lespes, Gaetane, Dachraoui, Mohamed
• Format: Journal Article
• Language: English
• Published: Taylor & Francis Group 20.08.2006; Taylor & Francis
• Subjects: Algae of Bizerte Lagoon; Analytical chemistry; Chemical Sciences; Environmental Sciences; Headspace solid-phase microextraction; Organotin compounds; Validation; Vegetal matrices; Tunisia; MED, Tunisia, Bizerte Lagoon; Validation; Gas chromatography; Plants (botany); Tin compounds; Algae; Algae of Bizerte Lagoon; Organotin compounds; Extraction; Headspace solid-phase microextraction; Vegetal matrices; Contamination; Photometry
• ISSN: 0306-7319; 1029-0397
• DOI: 10.1080/03067310500489577

Optimal conditions of headspace solid-phase microextraction followed by gas chromatography coupled to pulsed flame photometric detection (SPME-GC-PFPD) have been investigated to validate the analysis of 11 organotin compounds in plant matrices including methyl-, butyl-, and phenyltin compounds. The extraction of organotin compounds from vegetal matrices has been carried out using optimized conditions of HCl-based extraction. The use of headspace SPME to preconcentrate the analytes allowed most of the detection limits to be obtained sub-0.5 ng(Sn) g −1 . The precision evaluated using RSD with six replicates ranges between 5 and 10% (except for triphenyltin: 17%). The accuracy of the method was validated on spiked or polluted vegetal samples taken from Bizerte Lagoon (Tunisia) and by comparison with classical liquid-liquid extraction (LLE). These results highlight the suitability of the selected method for organotin control in complex environmental matrices such as aquatic plants.