Table 3 Arrhenius activation energy (Ea) of the color variation according to color channel and concentration of reaction solution

	D-Xylose (M)	Glycine (M)	Ea	Ln A	R2
Red channel	1.0	2.0	43.35	14.36	0.9689
	2.0	1.5	29.70	9.69	0.6517
	2.0	2.0	53.43	18.56	0.9917
	3.0	1.5	61.78	21.47	0.9902
	3.0	2.0	84.67	29.87	0.9985
	4.0	1.5	73.05	25.69	0.9997
	4.0	2.0	111.31	39.73	0.9921
	5.0	1.0	62.23	21.53	0.9792
	5.0	1.5	70.89	25.16	0.9993
	5.0	2.0	102.47	36.86	0.9995
	6.0	1.0	73.24	25.61	0.9993
	6.0	1.5	65.25	23.38	0.9657
	6.0	2.0	90.38	32.80	0.9531
Green channel	1.0	1.5	65.49	22.59	0.9996
	1.0	2.0	56.80	19.73	0.9900
	2.0	1.5	71.71	25.07	0.9932
	2.0	2.0	84.33	29.89	0.9883
	3.0	1.0	61.44	21.39	0.9987
	3.0	1.5	73.99	26.27	0.9955
	3.0	2.0	107.68	38.65	0.9925
	4.0	1.0	66.80	23.49	0.9978
	4.0	1.5	84.40	30.36	0.9980
	4.0	2.0	93.90	34.12	0.9985
	5.0	1.0	70.57	24.91	0.9949
	5.0	1.5	76.21	27.68	1.0000
	5.0	2.0	76.84	28.17	0.9687
	6.0	1.0	75.12	26.76	0.9995
	6.0	1.5	87.73	32.00	0.9858
Blue channel	1.0	1.0	61.89	21.19	0.9973
	1.0	1.5	92.30	32.75	0.9996
	1.0	2.0	113.13	40.22	1.0000
	2.0	1.0	68.26	23.89	0.9927
	2.0	1.5	84.28	29.96	0.9900
	2.0	2.0	105.76	38.16	0.9999
	3.0	0.5	40.66	13.87	0.9054
	3.0	1.0	76.16	27.04	0.9973
	3.0	1.5	90.95	33.05	0.9986
	3.0	2.0	76.74	28.15	0.9949
	4.0	0.5	62.86	21.83	0.9936
	4.0	1.0	100.71	36.12	0.9769
	4.0	1.5	64.64	24.00	0.9981
	4.0	2.0	41.71	15.98	0.7679
	5.0	0.5	78.38	27.48	0.9953
	5.0	1.0	87.87	31.70	0.9920
	5.0	1.5	44.22	16.99	0.9448
	6.0	0.5	71.63	25.17	0.9954
	6.0	1.0	82.05	29.93	0.9979
	6.0	1.5	27.12	11.06	0.8901