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Rapid Determination of Hydrogen Peroxide in Milk with Non-enzymatic Amperometric Sensor Based on Porous Gold Modified Screen-printed Electrode in Online Dialysis System |
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| Authors: | Chakkarin Maksuk Chonnatee Tinala Wasin Somboot Jaroon Jakmunee Frank Marken Tinakorn Kanyanee |
| Institution: | 1. Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200 Thailand
Center of Excellence for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200 Thailand Graduate School, Chiang Mai University, Chiang Mai, 50200 Thailand;2. Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200 Thailand Graduate School, Chiang Mai University, Chiang Mai, 50200 Thailand;3. Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200 Thailand Center of Excellence for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200 Thailand Research Center on Chemistry for Development of Health Promoting Products from Northern Resources, Faculty of Science, Chiang Mai University, Chiang Mai, 50200 Thailand;4. Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY UK;5. Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200 Thailand |
| Abstract: | A rapid method for determination of hydrogen peroxide based on a non-enzymatic amperometric sensor with an online dialysis unit was developed for analysis of sample with complicated matrices. A porous gold modified gold screen-printed electrode was prepared by a simple method using 9 V-battery electrodeposition. Based on data from amperometry, a linear dynamic range can be obtained in the range of 10 to 1000 μmol L?1, with a limit of detection of 0.37 μmol L?1. The proposed system was successfully applied to determine H2O2 in various milk samples with rapid analysis, high electrode stability, and excellent repeatability (1.95 % RSD with 100 replications). |
| Keywords: | Hydrogen peroxide Non-enzymatic Porous gold Online dialysis |