Table 2.

The L*, a*, b*, and ΔE* values for onion slices after 10 min of plasma treatment for non-treated (Control), treated with clean dry air gas (Air-Plasma), and treated with N₂ gas (N₂-Plasma).

Treatment	L*	a*	b*	ΔE2	ΔE ± SD
Control	78.59	−3.40	13.98
	78.64	−3.43	14.04
	78.53	−3.37	13.97
	78.67	−3.39	13.98
	78.58	−3.42	14.03
Air-Plasma	78.93	−3.04	13.15	0.93	1.03 ± 0.10
	78.90	−3.03	13.14	1.38
	78.81	−3.01	13.13	0.91
	78.70	−2.99	13.10	0.93
	77.89	−2.98	13.12	1.50
N2-Plasma	77.36	−2.96	12.66	3.45	1.90 ± 0.09
	77.25	−2.95	12.62	4.18
	77.42	−2.98	12.64	3.15
	77.3	−2.99	12.68	3.73
	77.37	−2.96	12.68	3.50