首页> 外国专利> MEASUREMENT OF POLYVINYL PYRROLIDONE IN LAUNDRY DETERGENT AND COSMETIC PRODUCTS BY GC-NPD ANALYSIS

MEASUREMENT OF POLYVINYL PYRROLIDONE IN LAUNDRY DETERGENT AND COSMETIC PRODUCTS BY GC-NPD ANALYSIS

机译:GC-NPD法测定洗衣粉和化妆品中的聚乙烯基吡咯烷酮

摘要

A method for quantitatively determining polyvinyl pyrrolidone present in low concentrations in detergent, cosmetic or other compositions, characterized by dissolving a sample of the composition in an organic solvent or an aqueous solution of an organic solvent, optionally removing by centrifugation any precipitate formed, pyrolyzing the diluted sample in a pyrolyzer (1), separating the pyrolysates in a gas chromatograph (4) and detecting the separated pyrolysates in a thermal ionic detector (7).
机译:一种定量测定洗涤剂,化妆品或其他组合物中低浓度聚乙烯基吡咯烷酮的方法,其特征在于将组合物样品溶解在有机溶剂或有机溶剂的水溶液中,可选地通过离心除去形成的沉淀,将其热解。稀释的样品放在热解器(1)中,在气相色谱仪(4)中分离热解产物,并在热离子检测器(7)中检测分离出的热解产物。

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