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Flow injection analysis of potassium using an all-solid-state potassium-selective electrode as a detector |
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| Authors: | Komaba S Arakawa J Seyama M Osaka T Satoh I Nakamura S |
| Institution: | a Department of Applied Chemistry, School of Science and Engineering, Kagami Memorial Laboratory for Materials Science and Technology, Waseda University, Shinjuku-ku, Tokyo, 169-8555, Japan b Department of Chemical and Biological Science, Faculty of Science, Japan Women's University, Mejirodai, Bunkyou-ku, Tokyo, 112-8681, Japan c Department of Applied Chemistry, Faculty of Engineering, Kanagawa Institute of Technology, 1030 Shimo-Ogino, Atsugi-shi, Kanagawa, 243-0292, Japan |
| Abstract: | The concentration of potassium was determined by a combination of flow injection analysis (FIA) with an all-solid-state potassium sensor detection. The all-solid-state potassium-selective electrode possessing long-term potential stability was fabricated by coating an electroactive polypyrrole/poly(4-styrenesulfonate) film electrode with a plasticized poly(vinyl chloride) membrane containing valinomycin. The simple FIA system developed in this laboratory demonstrated sensitivity identical to that in the batch system and achieved considerably rapid assay (150 samples h−1). Analyses of soy sauce and control serum samples by this FIA system yielded results in good agreement with those obtained by conventional measurements. |
| Keywords: | Flow injection analysis Ion selective electrode Potassium |
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