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All Journal Jurnal Ilmu Kimia Universitas Brawijaya
Setyorini, Dian Ayu
Brawijaya University
Chemical Engineering, Chemistry & Bioengineering Chemistry

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PENENTUAN KAFEIN SECARA AMPEROMETRI DENYUT MENGGUNAKAN ELEKTRODA KARBON SCREEN-PRINTED Setyorini, Dian Ayu; Mulyasuryani, Ani; Fardiyah, Qonitah
Jurnal Ilmu Kimia Universitas Brawijaya Vol 1, No 1 (2014)
Publisher : Jurusan Kimia, FMIPA Universitas Brawijaya

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Abstract

Caffeine is usually used as an additive in drinks, foods and medicines. Caffeine has a negative effect on the human body so ithas a limited dose to consume. Amperometric detection can be used to measure caffeine by using SPCE. Determination of caffeine by amperometry can use single-pulse (SPA) and double-pulse (DPA). SPA applied detection potential 1,3 V (0,05 s) and has limit of detection 22 µM. DPA applied detection potential 1,3 V (0,05 s) and cleaning potential 0,35 V (0,1 s) and has limit of detection 0,9 µM. DPA was used to measure caffeine in sample of energy drinks and it concludes good accuracy. Keywords: pulse amperometry, caffeine, SPCE.
Co-Authors Ani Mulyasuryani Qonitah Fardiyah