A novel technique for direct derivatization of ionic organotin and alkyl-lead compounds in sediment: simultaneous determination of organotin and alkyl-lead compounds in sediment by gas chromatography–plasma atomic emission (GC–AED) dual-channel detection
✍ Scribed by Y. K. Chau; F. Yang
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 74 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0268-2605
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✦ Synopsis
A direct derivatization carried out on sediment slurries and simultaneous speciation of organotin and alkyl lead in sediments is described. Simultaneous determination was performed using dual-channel operation of the AED detector. Direct contact of phentylmagnesium bromide with the sediment improved drastically the recovery of the monobutyltin (MBT) species. The combined complexation/extraction/derivatization procedure and the dual-channel AED operation reduced the analysis time. Analysis of a Certified Reference sediment, PACS-1, demonstrated the accuracy of the method. The absolute detection limits (3ϫ noise level) are 0.5 pg and 0.2 pg respectively for tin and lead. The relative detection limits for sediment (1 g sample) are 2.5 ng g Ϫ 1 and 1 ng g Ϫ 1 respectively for organotin and alkyl-lead, expressed as the metal. The results of the analysis of some environmental samples are given.