Parker R D
Dow Corning Ltd, Barry, South Glamorgan, United Kingdom.
J Assoc Off Anal Chem. 1990 Sep-Oct;73(5):721-3.
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.
9个实验室合作研究了一种用原子吸收分光光度法测定菠萝汁中聚二甲基硅氧烷（PDMS）残留量的方法。用4-甲基-2-戊酮从菠萝汁中提取PDMS残留，提取出的硅氧烷用原子吸收分光光度法在氧化亚氮/乙炔火焰下进行测定。合作人员分析了5个样品，包括1个重复盲样。在PDMS含量为31 ppm时，再现性相对标准偏差（RSDR）为13.1%；18 ppm时为6.9%；7.9 ppm时为14.8%；4.9 ppm时为16.1%。该方法已被美国官方分析化学师协会（AOAC）批准为暂行官方首次采用方法。
