title: [Determination and identification of anions and cations in cosmetics].
abstract: A method was developed for the determination of anions and cations (Na+, NH4+, K+, Mg2+, Ca2+,Cl-, Br-, NO2- , NO3- and SO4(2-)) in cosmetics by using ion chromatography with conductometric detection. The eluent for determining anions was 1,2,4,5-benzenetetracarboxylic acid (2.0 mmol/L) with 1.0 mL/min flow rate on anion exchange column (ICS-C25), while that for cations was o-phthalic acid (2.5 mmol/L) and trihydroxyaminomethane (2.4 mmol/L ) with 0.6 mL/min flow rate on cation exchange column (Shim-pack IC-Al). The ions had good linear relations in wide range, and the recoveries were from 93% to 102%.
authors.affiliation: Qingdao Entry-Exit Inspection and Quarantine Bureau, Qingdao 266002, China. qdciqhks@public.qd.sd.cn
authors.forename: Jianguo
authors.initials: J
authors.lastname: Gao
authors.forename: Yingjie
authors.initials: Y
authors.lastname: Wang
authors.forename: Shishan
authors.initials: S
authors.lastname: Chen
authors.forename: He
authors.initials: H
authors.lastname: Cui
authors.forename: Xubin
authors.initials: X
authors.lastname: Mao
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Mei
authors.initials: M
authors.lastname: Gao
mesh_terms: D000838:Anions / Q000032:analysis*; D002412:Cations / Q000032:analysis*; D002852:Chromatography, Ion Exchange / Q000379:methods; D003358:Cosmetics / Q000737:chemistry*
chemical_list: D000838:Anions; D002412:Cations; D003358:Cosmetics