title: Quantitative determination of polysorbate to in non-standard salad dressings.
abstract: 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.
mesh_terms: D005503:Food Additives / Q000032:analysis*; D005504:Food Analysis / Q000379:methods*; D011092:Polyethylene Glycols / Q000032:analysis*; D011136:Polysorbates / Q000032:analysis*
chemical_list: D005503:Food Additives; D011136:Polysorbates; D011092:Polyethylene Glycols