4.6 Article

Analysis of Mercury in Skin Lightening Cream by Microwave Plasma Atomic Emission Spectroscopy (MP-AES)

Journal

MOLECULES
Volume 26, Issue 11, Pages -

Publisher

MDPI
DOI: 10.3390/molecules26113130

Keywords

analytical method validation; mercury; MP-AES; skin lightening cream

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The research successfully developed an analysis method to determine the mercury content in skin lightening cream, with good precision and linearity, which could be used for routine chemical analysis of cosmetics products.
This research aimed at developing an analysis method, which was optimized and validated to determine the content of mercury in skin lightening cream discovered in the market in Bandar Lampung, Indonesia, through the use of microwave plasma atomic emission spectroscopy (MP-AES). The optimization on the analysis method was conducted on pump rate, viewing position, and reductant concentration in order to obtain the highest mercury emission intensity, while the solution stability was optimized to know the stability of mercury in the solution. The result showed that the method developed had precision with a relative standard deviation of 2.67%, recovery value of 92.78%, and linearity with an r value of 0.993, respectively. The sensitivity of the instrument detection had a limit of analysis method detection and quantification of 0.59 and 1.98 mu g/L, respectively. The results of the test of the lightening cream (8 of 16 samples) positively contained mercury in the range of 422.61-44,960.79 ng/g. Therefore the method of analysis developed may be used for routine analysis of chemicals in any cosmetics products.

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