Headspace gas chromatography analysis of toxic contaminants in ethoxylated alcohols and alkylamines

Analysis of surfactants: Part I

“…Direct analyses are also used to study toxic components within common cosmetic and washing products (29). Quantification of 1,4-dioxane, ethylene oxide, and ethylene glycol in the low part-per-million range was possible using a Permaphase PEG or DB-17 column and dimethylformamide or undecanol as the solvent.…”

Determination of residual 1,4‐dioxane in surfactants and cleaning agents using headspace single‐drop microextraction followed by gas chromatography–flame ionization detection

“…There are a few reports focusing on the determination of 1,4‐dioxane in non‐ionic surfactants and cosmetics products. Headspace solid‐phase microextraction (SPME) coupled with gas chromatography (GC) and GC–mass spectrometry (MS) , liquid–liquid extraction (LLE) followed by solid‐phase extraction (SPE) and GC‐MS detection , SPE–high‐performance liquid chromatography , SPE‐GC‐MS , direct injection of the diluted sample to GC–flame ionization detection (FID) and GC‐MS , and headspace extraction followed by GC‐FID and GC‐MS are the main techniques employed for the determination of 1,4‐dioxane in ethoxylated surfactants and cosmetic products. The analytical characteristics of some of these methods are shown in Table .…”

Desenvolvimento de um método de MEFS com CG-DIC para determinação de 1,4 dioxana em amostras de cosméticos

“…Alguns métodos 6 utlizam técnicas clássicas de extração líquido-líquido, obtendo um baixo índice de recuperação (70-80%). Outros métodos 7,8 utilizam extração por Headspace obtendo um bom índice de recuperação, mas com baixa repetibilidade (%S = 9) e alto limite de detecção (3 mg Kg -1 ). Uma técnica alternativa para análise de analítos voláteis é a Microextração por Fase Sólida (MEFS) 9,10 .…”