Abstract
ABSTRACTThe quantification of volatile compounds in cosmetic products or raw materials remains problematic because of the complexity of the matrices. Two approaches were investigated on the basis of a full vaporization of analytes from a sample deposited on a cylinder of polydimethylsiloxane (PDMS) foam: (1) an internal standardization using the same calibration curve for all samples, which gives rise to unexplained peak magnifications that biases the determinations, and (2) a standard addition protocol. The latter was tested for the analysis of suspected allergens and allowed the quantification of all compounds except farnesol and Lyral®. A decision tree was proposed to ascertain peak identity and the validity of the regression curve. Using this strategy in the range of 50–100 mg/l, 91% of all individual results (except farnesol and Lyral®) in all matrices fell within a tolerance interval of ±25%. In addition, the use of disposable PDMS cylinders allowed 400 injections without polluting the injector or the column. Copyright © 2014 John Wiley & Sons, Ltd.
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