Matrix Modifiers Optimization for Determination of Chromium in Cosmetics by Graphite Furnace Atomic Absorption Spectrometry
- VernacularTitle:化妆品中铬的石墨炉原子吸收测定法中基体改进剂的优选
- Author:
Yu SONG
;
Wenjia FAN
- Publication Type:Journal Article
- Keywords:
Spectrophotometry,atomic absorption;
Graphite furnace atomic absorption spectrometry;
Chromium;
Cosmetic;
Matrix modifier
- From:
Journal of Environment and Health
1993;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To select a matrix modifier,which can effectively eliminate the matrix interference in the determination of chromium in cosmetics by graphite furnace atomic absorption spectrometry(GFAAS).Methods The orthogonal experiment design was used to define the best operation parameter of graphite furnace.Vitamin C,(NH4)H2PO4,(NH4)2HPO4,NH4Cl and Mg(NO3)2 were added respectively as the matrix modifiers.The effect of five matrix modifiers was compared by precision test.Results When(NH4)H2PO4 was taken as the chemical modifier,the determination result was satisfied.The characteristic mass was 5.68?10-12 g,relative standard deviation were from 2.11% to 4.46%.The rate of recovery of two cosmetics samples were 95.2% and 102.01%.Conclusion(NH4)H2PO4 can increase the ashing temperature,decrease the atomization temperature,eliminate the matrix interference and the result has good precision and accuracy.
