. 2026 Sep 11. Online ahead of print. doi: 10.1039/d6ra04410g

Table 2. DPPH and ABTS˙⁺ radical scavenging activity (%) of Ag/ZrO₂ NCs and ascorbic acid at concentrations of 1.9–1000 µg mL⁻¹, with corresponding IC₅₀ values^a.

Conc. (µg mL⁻¹)	Antioxidant scavenging activity
	Ag/ZrO₂ NCs	Ascorbic acid DPPH scavenging% IC₅₀ = 2.69 ± 0.02 µg mL⁻¹	Ag/ZrO₂ NCs	Ascorbic acid
	DPPH scavenging%		ABTS˙⁺ scavenging%	ABTS˙⁺ scavenging%
	IC₅₀ = 7.14 ± 0.13 µg mL⁻¹		IC₅₀ = 6.68 ± 0.12 µg mL⁻¹	IC₅₀ = 3.48 ± 0.10 µg mL⁻¹
1.9	34.7***	44.9	37.3***	42.9
3.9	42.4***	52.5	43.1***	53.6
7.8	50.5***	58	52.4***	56.7
15.6	58.5***	66.2	59.0***	62.9
31.2	66.6***	73.7	65.1***	68.3
62.5	74.7***	82.2	71.1**	73.5
125	82.5***	89.7	80.8*	82.2
250	89.5***	92.7	87.0*	88.1
500	94.0***	96.1	91.8***	94.2
1000	96.8**	98.5	94.5**	96.1

Values are means of three independent replicates (n = 3). *p < 0.05, **p < 0.01, ***p < 0.001, Ag/ZrO₂ NCs vs. ascorbic acid at the matching concentration, independent-samples t-test

Table 2. DPPH and ABTS˙+ radical scavenging activity (%) of Ag/ZrO2 NCs and ascorbic acid at concentrations of 1.9–1000 µg mL−1, with corresponding IC50 valuesa.

Table 2. DPPH and ABTS˙⁺ radical scavenging activity (%) of Ag/ZrO₂ NCs and ascorbic acid at concentrations of 1.9–1000 µg mL⁻¹, with corresponding IC₅₀ values^a.