Flow Injection Analysis of Aluminum Chlorohydrate in Antiperspirant Deodorants Using a Built‐in Three‐in‐one Screen‐Printed Silver Electrode |
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| Authors: | Mei‐Hsin Chiu Annamalai Senthil Kumar Sundaram Sornambikai Jyh‐Myng Zen Ying Shih |
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| Institution: | 1. Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan;2. Environmental and Analytical Chemistry Division, Department of Chemistry, Vellore Institute of Technology University, Vellore‐632 014, India;3. Department of Cosmetic Science, Providence University, Taichung 433, Taiwan |
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| Abstract: | A screen‐printed silver strip with a built‐in three‐in‐one electrode (SPAgE) configuration of Ag‐working, Ag‐counter and Ag/AgxO (silver oxides) pseudoreference electrodes has been developed for sensitive and selective electrochemical flow injection analysis (FIA) of aluminum chlorohydrate (ACH) present in antiperspirants, through the free Cl? ion liberated from ACH in aqueous medium, as a redox signal at Ag‐working electrode in pH 6 phosphate buffer solution (PBS). The solution phase and instrumental parameters were systematically optimized. The calibration graph was linear in the window 1–200 ppm concentration of ACH and the lowest detection limit (S/N=3) was 295 ppb with a slope of 0.0989 μA/ppm and regression coefficient of 0.998. Calculated relative standard deviation (RSD) values for the detection of 5 and 50 ppm ACH by this method are 2.21 % and 2.16 %, respectively. Four different antiperspirant deodorants real samples with and without ACH content were successfully analyzed and the detected values obtained were found to be in good agreement with the product labeled values. |
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| Keywords: | Aluminum chlorohydrate Screen‐printed silver electrodes Flow‐injection analysis Antiperspirants |
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