Organotin Leachates in Drinking Water from Chlorinated Poly(vinyl chloride) (CPVC) Pipe
✍ Scribed by D. S. Forsyth; B. Jay
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 124 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0268-2605
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✦ Synopsis
A solid-phase extraction method, using a phenyl-bonded silica sorbent, was developed for the isolation of mono-and di-methyltin, -butyltin and -octyltin from drinking water. Recoveries averaged 92% over two tested sample weights and spiking levels. Ethyl derivatives were made by Grignard reaction for determination by gas chromatographyatomic absorption spectrometry (GC-AAS). Static and repetitive extraction studies were conducted at 24 and 65°C. Butyltins rapidly leached into drinking water kept in chlorinated poly(vinyl chloride) (CVPC) pipe samples. Monobutyltin and dibutyltin levels reached 19.8 (13.4 as Sn) and 197 (100.4 as Sn) ng g Ϫ 1 respectively in water samples collected from CPVC pipe heated to 65°C. Butyltins were still leached from CPVC pipe after 20 repetitive extractions, suggesting that new CPVC water systems would contaminate water with organotins for some time after installation.