- 作者: 石瑩,曾志明
- 作者服務機構: Department of Applied Cosmetology, Hung Kuang University, Taichung 433, Taiwan, R.O.C.
- 中文摘要: 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 CuPCB/SPE) was applied to study the electrochemical characteristics of AA-2G. Cyclic voltammogram of the CuPCB/SPE showed an electrocatalytic oxidative feature at ~0.6 V vs. Ag/AgCl in 0.15 M NaOH solution. Flow injection analysis coupled with the CuPCB/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 mA/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.
- 英文摘要: --
- 中文關鍵字: Printed-circuit board waste; Ascorbyl glucoside; Flow injection analysis; Screen printed electrode.
- 英文關鍵字: --