Table 6. Results of antiradical activity (DPPH˙ assay), time of the first phase of antiradical activity reaction, percentages of DPPH˙ depleted in the first phase and at the end of reaction, and kinetic parameters of DPPH˙ disappearance estimated by the first-order double exponential model for the fir (Abies alba Mill.) honeydew honey samples.

Honey sample	(n(TEAC)/m(honey))/(mmol/kg)	t1/min	DPPHa/%	DPPHb/%	First-order double exponential model
					k1/min-1	k2/min-1	R2	SRMSE	χ2 error
1	0.63±0.01	1.5	8.65	29.83	0.5808	0.0292	0.9999	0.0025	0.22
2	0.80±0.02	2.0	17.66	38.22	1.2523	0.0311	0.9999	0.0038	0.35
3	1.01±0.01	2.5	28.49	47.74	1.3094	0.0286	0.9999	0.0041	0.37
4	0.52±0.01	1.5	8.50	26.14	0.7399	0.0280	0.9999	0.0024	0.22

t₁=time of the first phase of DPPH˙ disappearance, k₁ and k₂=kinetic rate constants in first-order double exponential model, R²=determination coefficient, SRMSE=scaled root mean squared error, χ² error=error of chi-square test, ^apercentage of DPPH˙ depleted in the first phase of reaction, ^bpercentage of DPPH˙ depleted at the end of the reaction