Speciation of organotins in poly(vinyl chloride) products.
Extraction studies on butyl- and octyltins were conducted with three poly(vinyl chloride) (PVC) product types: clear food container, rigid pipe and flexible membrane. Three solvents, tetrahydrofuran, xylene and methylene chloride were evaluated for extraction efficiency. Methylene chloride extracted more than 97% of the total extractable organotin in two extractions and resulted in the highest recoveries of analytes from all three PVC products. Method detection limits ranged from 0.3 to 0.9 microgram alkyltin/g PVC. The mean precision of the method is 6.8% relative standard deviation. Food industry PVC product samples contained between < 0.8 and 8751 micrograms/g octyltins and < 0.3 and 4.7 micrograms/g butyltins. Butyltins (< 0.9-5985 micrograms/g) were detected in potable water pipe samples. Pipe used in industrial applications contained both butyl- (13-1501 micrograms/g) and octyltins (701-3033 micrograms/g).
Forsyth
D S
DS
Food Research Division, Health and Welfare Canada, Ottawa, Ontario.
Dabeka
R
R
Sun
W F
WF
Dalglish
K
K
D005506:Food Contamination; D005511:Food Handling; D008401:Gas Chromatography-Mass Spectrometry; D009947:Organotin Compounds / Q000032:analysis*; D011143:Polyvinyl Chloride / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D014001:Tin / Q000032:analysis
D009947:Organotin Compounds; D012997:Solvents; D014001:Tin; D011143:Polyvinyl Chloride