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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Polymer modified glassy carbon electrode for the electrochemical determination of caffeine in coffee
Talanta, Volume 93, Year 2012
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Description
4-Amino-3-hydroxynaphthalene sulfonic acid (AHNSA) was electropolymerized on a glassy carbon electrode. The deposited film showed electrocatalytic activity towards the oxidation of caffeine. The polymer-modified electrode showed high sensitivity, selectivity and stability in the determination of caffeine in coffee. The peak current increased linearly with the concentration of caffeine in the range of 6 × 10-8 to 4 × 10 -5 mol L-1, with a detection limit of 1.37 × 10 -7 mol L-1 (LoD = 3δ/slope). Analysis of caffeine in coffee was affected neither by sample matrices nor by structurally similar compounds. Recoveries ranging between 93.75 ± 2.32 and 100.75 ± 3.32 were achieved from coffee extracts indicating the applicability of the developed method for real sample analyses. © 2012 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Amare, Meareg
Ethiopia, Addis Ababa
Addis Ababa University
Admassie, Shimelis
Ethiopia, Addis Ababa
Addis Ababa University
Statistics
Citations: 80
Authors: 2
Affiliations: 1
Identifiers
Doi:
10.1016/j.talanta.2012.01.058
Research Areas
Environmental