Atomic absorption spectrophotometric method for determination of polydimethylsiloxane residues in pineapple juice: collaborative study.
An atomic absorption spectrophotometric method for determination of polydimethylsiloxane (PDMS) residues in pineapple juice was collaboratively studied by 9 laboratories. PDMS residues are extracted from pineapple juice with 4-methyl-2-pentanone and the extracted silicone is measured by atomic absorption spectrophotometry using a nitrous oxide/acetylene flame. Collaborators analyzed 5 samples including 1 blind duplicate. Reproducibility relative standard deviations (RSDR) were 13.1% at 31 ppm, 6.9% at 18 ppm, 14.8% at 7.9 ppm, and 16.1% at 4.9 ppm PDMS. The method has been approved interim official first action by AOAC.
Parker
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Dow Corning Ltd, Barry, South Glamorgan, United Kingdom.
D001628:Beverages / Q000032:analysis*; D004129:Dimethylpolysiloxanes / Q000032:analysis*; D005503:Food Additives / Q000032:analysis*; D005638:Fruit / Q000032:analysis*; D007202:Indicators and Reagents; D013054:Spectrophotometry, Atomic
D004129:Dimethylpolysiloxanes; D005503:Food Additives; D007202:Indicators and Reagents