PMID- 21046791 OWN - NLM STAT- MEDLINE DCOM- 20120213 LR - 20190923 IS - 1000-8713 (Print) IS - 1000-8713 (Linking) VI - 28 IP - 7 DP - 2010 Jul TI - [Simultaneous determination of ammonium and six alkylamines in cosmetics by ion chromatography]. PG - 702-7 AB - A method for the simultaneous determination of ammonium and six alkylamines in cosmetic products by ion chromatography (IC) was developed. The sample pretreatment process and the separation resolution of chromatography were investigated. The samples were extracted by 100 mmol/L acetic acid-20% (v/v) acetonitrile solution at room temperature, and then solid phase extraction (SPE) column was used to eliminate the interferences. The influences of pH value, organic solvent and coexisted ions were investigated. The separation was carried out on IonPac CS17 (250 mm x 4 mm)analytical column and IonPac CG17 (50 mm x 4 mm)guard column using 1.5 - 15 mmol/L methanesulfonic acid and 0.5% - 5% (v/v) acetonitrile gradient elution at a flow rate of 1.0 mL/min at 24 degrees C, coupled with suppressed conductivity detector. Under the optimum conditions, a measurement could be completed less than 26 min. The linearity ranged from 0.3 to 15 mg/L, the detection limits and the quantification limits were in the ranges of 2.1 - 7.9 mg/kg and 7 - 26 mg/kg, respectively. The method was successfully employed for the determination of ammonium, methylamine, dimethylamine, trimethylamine, ethylamine, propylamine and butylamine in samples including cleaning, body lotion, skin-bleaching, sun block, marcel, hair dye and pilatory cosmetics with the recoveries of 80.2% - 109.2% and the relative standard deviations (RSDs) of 0.5% - 3.1%. The method offered high selectivity, sensitivity, and gave satisfactory results for real sample analysis. FAU - Zhong, Zhixiong AU - Zhong Z AD - Center for Disease Control and Prevention of Guangdong Province, Guangzhou 510300, China. zzxiong608@yahoo.com.cn FAU - Li, Gongke AU - Li G FAU - Zhu, Binghui AU - Zhu B FAU - Luo, Zhibin AU - Luo Z FAU - Wu, Ximei AU - Wu X LA - chi PT - English Abstract PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - China TA - Se Pu JT - Se pu = Chinese journal of chromatography JID - 9424804 RN - 0 (Alkadienes) RN - 0 (Amines) RN - 0 (Cosmetics) RN - 0 (Methylamines) RN - 0 (Quaternary Ammonium Compounds) SB - IM MH - Alkadienes/analysis MH - Alkylation MH - Amines/*analysis MH - Chromatography, Ion Exchange/*methods MH - Cosmetics/*analysis MH - Methylamines/*analysis MH - Quaternary Ammonium Compounds/*analysis MH - Sensitivity and Specificity EDAT- 2010/11/05 06:00 MHDA- 2012/02/14 06:00 CRDT- 2010/11/05 06:00 PHST- 2010/11/05 06:00 [entrez] PHST- 2010/11/05 06:00 [pubmed] PHST- 2012/02/14 06:00 [medline] AID - 10.3724/sp.j.1123.2010.00702 [doi] PST - ppublish SO - Se Pu. 2010 Jul;28(7):702-7. doi: 10.3724/sp.j.1123.2010.00702.