Determination of Cobalt in Cosmetics by Microwave Digestion Graphite Furnace Atomic Absorption Spectrometry
- VernacularTitle:化妆品中钴的微波消解-石墨炉原子吸收测定法
- Author:
Jian LI
;
Jiansen DING
- Publication Type:Journal Article
- Keywords:
Cobalt;
Graphite furnace atomic absorption spectrometry;
Cosmetic;
Microwave-digestion
- From:
Journal of Environment and Health
1993;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
ve To develope a new graphite furnace atomic absorption spectrophotometric (GFAAS) method for determination of cobalt in cosmetics. Methods Samples were digested by HNO3-HCl and microwave. The use of a new matrix modifier, (NH4)2 HPO4-ascorbic acid as a matrix, could effectively improve the shape of peak and eliminate the matrix interferences.The best determination conditions, such as the procedure of sample digestion, the measurement parameters were defined in this assay. Results The characteristic concentration, linear range, re-covery rate and coefficient of variation were 1.2?g/L, 0 -40?g/L, 100.16% ~102.01% and 1.82%-3.26% re-spectively. Conclusion Application of matrix modifier (NH4)2 HPO4-ascorbic acid for determination of Co with GFAAS, was easy and presented good repeatibility.
