Research Article
CUPRAC Voltammetric Determination of Antioxidant Capacity in Tea Samples by Using Screen-Printed Microelectrodes
Table 4
Current values (μA), absorbance values, and the corresponding concentration values (×10−4 mol·L−1) of the tea samples.
| | Method | DPV | Spectrophotometry | | Sample | Current (μA) | Concentration (×10−4 mol·L−1) | Absorbance (λ = 450 nm) | Concentration (×10−4 mol·L−1) |
| | G1 | 0.024351 | 8.624014 | 0.261 | 8.517647 | | G2 | 0.021224 | 11.230403 | 0.305 | 11.10588 | | G3 | 0.247403 | 8.299720 | 0.258 | 8.341176 | | G4 | 0.029478 | 4.351879 | 0.192 | 4.458824 | | G5 | 0.032166 | 2.111386 | 0.151 | 2.047059 |
| | B1 | 0.022960 | 9.783305 | 0.279 | 9.576471 | | B2 | 0.020059 | 12.200286 | 0.319 | 11.92941 | | B3 | 0.025903 | 7.330995 | 0.238 | 7.164706 | | B4 | 0.023679 | 9.183913 | 0.270 | 9.047059 | | B5 | 0.018433 | 13.555708 | 0.348 | 13.63529 |
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