[Determination and identification of anions and cations in cosmetics].
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%.
Gao
Jianguo
J
Qingdao Entry-Exit Inspection and Quarantine Bureau, Qingdao 266002, China. qdciqhks@public.qd.sd.cn
Wang
Yingjie
Y
Chen
Shishan
S
Cui
He
H
Mao
Xubin
X
Zhang
Lei
L
Gao
Mei
M
D000838:Anions / Q000032:analysis*; D002412:Cations / Q000032:analysis*; D002852:Chromatography, Ion Exchange / Q000379:methods; D003358:Cosmetics / Q000737:chemistry*
D000838:Anions; D002412:Cations; D003358:Cosmetics