Table 5.

Results of AA determination on the proposed Au-gr/CVE sensor and potentiometric titration in fruit juices (n = 3, P = 0.95).

Samples	Found Using Au-gr/CVE	RSD, %	Found by Potentiometric Titration	RSD, %	F-Test	t-Test
Cherry-apple juice	0.81 ± 0.06	6.8	0.76 ± 0.07	8.7	1.43	0.67
Apple juice for children	0.47 ± 0.01	2.2	0.42 ± 0.03	7.6	9.00	1.82
Apple juice	0.16 ± 0.01	5.0	0.16 ± 0.01	4.5	1.18	0.49
Apple nectar clarified	0.09 ± 0.01	6.5	0.09 ± 0.01	9.0	1.97	0.19

F_crit. = 19.00 at P = 0.95 и df₁ = 2, df₂ = 2; t_crit. = 2.78 at P = 0.95 и df = 4.