Miratul Khasanah and Alfa Akustia Widati and Sarita Aulia Fitri (2016) Imprinted Zeolite Modified Carbon Paste Electrode as a Potentiometric Sensor for Uric Acid. In: 5th International Conference and Workshop on Basic and Applied Sciences (ICOWOBAS 2015). AIP Publishing, Surabaya, Indonesia, 070003-1. ISBN ISSN:0094-243X E-ISSN:1551-7616

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Abstract

Imprinted zeolite modified carbon paste electrode (carbon paste-IZ) has been developed and applied to determine uric acid by potentiometry. The imprinted zeolite (IZ) was synthesized by the mole ratio of uric acid/Si of 0.0306. The modified electrode was manufactured by mass ratio of carbon, IZ and solid paraffin was 40:25:35. The modified electrode had shown the measurement range of 10−5 M to 10−2 M with Nernst factor of 28.6 mV/decade, the detection limit of 5.86 × 10−6 M and the accuracy of 95.3 – 105.0%. Response time of the electrode for uric acid 10−5 M - 10−2 M was 25 - 44 s. The developed electrode showed the high selectivity toward uric acid in the urea matrix. Life time of the carbon paste-IZ electrode was 10 weeks.

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