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|標題:||Flow injection analysis of ascorbyl glucoside in cosmetics by a disposable printed-circuit board waste modified electrode||作者:||Shih, Y.
|關鍵字:||printed-circuit board waste;ascorbyl glucoside;flow injection;analysis;screen printed electrode;vitamin-c||Project:||Journal of the Chinese Chemical Society||期刊/報告no：:||Journal of the Chinese Chemical Society, Volume 53, Issue 4, Page(s) 857-862.||摘要:||
Ascorbyl glucoside, i.e., ascorbic acid 2-glucoside (AA-2G), is a new type of stable vitamin C derived compound used in many cosmetic skin-lightening formulations, but rarely studied in the literature. In this study, a screen printed electrode modified with copper-enriched printed circuit-board waste (designated as Cu-PCB/SPE) was applied to study the electrochemical characteristics of AA-2G. Cyclic voltammogram of the Cu-PCB/SPE showed an electrocatalytic oxidative feature at similar to 0.6 V vs. Ag/AgCl in 0.15 M NaOH solution. Flow injection analysis coupled with the Cu-PCB/SPE was further developed for sensitive AA-2G determination. The calibration plot was linear in the window of 2.5-160 ppm with slope and regression coefficient of 0.0169 mu A/ppm and 0.9971, respectively. The detection limit (S/N = 3) was 0.247 ppm. Real sample analysis was demonstrated for different skin-lightening cosmetic products with appreciable results.
|Appears in Collections:||化學系所|
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