抄録
The quantitative determination method for arsenic (As), lead (Pb), and Cadmium (Cd), in cosmetics has been designed. In this method, the sample solutions are prepared by a wet decomposition method, with nitric acid-sulfuric acid- perchloric acid and a dry ashing method.
As, Pb and Cd are determined by the flame atomic absorption spectrophotometry (FAAS). As and Pb are also determined by the gutzeit method and the dithizone method respectively.
In this paper, recovery rate of these metals from several types of cosmetics are examined. The results indicate the FAAS is most suitable for its readiness and accuracy, as a determination method. The gutzeit method and the dithizone method are also applicable to cosmetics.
The wet decomposition method is successfully applied to almost all the types of cosmetics. In this case, the recovery rates of these metals are over 90%
But, in the case of Pb determination from the cosmetics which will include significant amounts of multi valent metal salts, the decomposition ought to be carried out without surfuric acid.
