Research Article
Electrochemical Determination of Caffeine Content in Ethiopian Coffee Samples Using Lignin Modified Glassy Carbon Electrode
Figure 3
CVs of LGCE in ABS of different pH values (3.0–6.0) containing 1.0 × 10−3 mol L−1 of caffeine. Inset: plot of Ipa versus pH in pH range 3.0–6.0 at a scan rate of 100 mV s−1.