Smullin C F
J Assoc Off Anal Chem. 1978 May;61(3):506-7.
Six samples of non-standard salad dressing, containing 0.10 to 0.60% polysorbate 60, were submitted to 6 collaborators. The salad dressing is extracted and the extract is saponified and acidified, and the acids are removed. The aqueous, polyol solution is desalted and the polyoxyethylated polyols are precipitated as a highly insoluble heteropoly acid complex. The polysorbate 60 content is calculated from the weight of the precipitate, using a gravimetric factor. Average recoveries from the collaboration samples ranged from 105 to 130%, with standard deviations from 0.016 to 0.047. The method has been adopted as official first action.
向6位合作者提交了6份含有0.10%至0.60%聚山梨醇酯60的非标准沙拉酱样品。对沙拉酱进行萃取，萃取液经皂化和酸化后去除酸。对水性多元醇溶液进行脱盐处理，使聚氧乙烯化多元醇以高度不溶性杂多酸络合物的形式沉淀出来。使用重量因子，根据沉淀物的重量计算聚山梨醇酯60的含量。协作样品的平均回收率在105%至130%之间，标准偏差为0.016至0.047。该方法已被采用为首次官方方法。
