| Abstract: | Ascorbyl glucoside, i.e., ascorbic acid 2‐glucoside (AA‐2G), is anew 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 μA/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. |
