Multi-channel purge and trap system coupled with ion chromatography for the determination of alkylamines in cosmetics

• Published in: Analytica chimica acta 2012-02, Vol.715, p.49-56
• Main Authors: Zhong, Zhixiong, Li, Gongke, Luo, Zhibin, Zhu, Binghui
• Format: Article
• Language: English
• Subjects: Alkylamine; Alkylamines; Amines - analysis; Analytical chemistry; Butylamines - analysis; Chemistry; Chromatographic methods and physical methods associated with chromatography; Chromatography; Chromatography, Ion Exchange - instrumentation; Chromatography, Ion Exchange - methods; Cosmetics; Cosmetics - chemistry; Ethylamines - analysis; Exact sciences and technology; Humans; Ion chromatography; Limit of Detection; Mathematical analysis; Methylamines - analysis; Miniaturization; Multi-channel purge and trap; Other chromatographic methods; Propylamines - analysis; Routines; Standard deviation; Steam distillation
• ISSN: 0003-2670; 1873-4324
• DOI: 10.1016/j.aca.2011.12.017

[Display omitted] ► A multi-channel purge and trap system was developed for detecting alkylamines. ► Analytes in cosmetics were detected by ion chromatography. ► Matrix interferences were eliminated effectively. ► Ten channels integration enhanced sample treatment. ► Miniaturization of the steam distillation improved the sensitivity. A new multi-channel purge and trap system coupled with ion chromatography for the determination of six alkylamines in cosmetics was developed. The proposed method, based on purge and trap of the volatile alkylamines, involved in a miniaturization and multi-channel integration of classical steam distillation and a simple approach for routine labs. The procedure was rapidly achieved within 10 min and the matrix interferences could be effectively eliminated. Sample pretreatment frequency was higher than 40 h −1. The linear ranges were 0.1–15 mg L −1 and the detection limits varied from 0.023 to 0.038 mg L −1. This method was successfully utilized to determine the amounts of alkylamines in cosmetics with recoveries ranging from 80.3 to 105.5% and the relative standard deviations (RSDs) ranging from 0.78 to 7.5%. It was proved to be accurate, time-saving, and suitable for the determination of large numbers of cosmetics in a short time.