CUPRAC Voltammetric Determination of Antioxidant Capacity in Tea Samples by Using Screen-Printed Microelectrodes

Table 1

Precision measurements for 12 · 10⁻⁴ mol·L⁻¹ trolox standard solution.

Statistical parameter	Intra-assay						Interassay
	DPV			Spectrophotometry			DPV	Spectrophotometry
	Day 1	Day 2	Day 3	Day 1	Day 2	Day 3
Average	12.244	11.890	12.110	12.439	11.969	12.204	12.081	12.204
Standard deviation (SD)	0.130	0.128	0.042	0.189	0.0334	0.170	0.179	0.235
Relative standard deviation (RSD)	1.061	1.073	0.348	1.520	0.284	1.391	1.482	1.928