Table 2: 3w/w % NaOH pretreatment at 120°C.

Time, mins	Absorbance, -	Concentration mg/mL
0	0	0
30	0.889	1.778
60	1.689	3.378
90	2.884	5.768
120	3.442	7.351
150	4.215	9.544
180	5.611	13.512
210	6.540	16.15
240	7.913	20.041
270	8.770	22.483
300	9.782	26.48
330	10.55	29.51
360	11.68	33.95
390	12.671	37.9
420	13.961	43.053
450	14.882	45.46
480	15.776	47.81
510	16.661	50.15
540	17.481	52.33
570	18.983	56.32
600	19.59	57.8
630	20.896	60.96
660	21.627	61.84
690	23.145	63.61
720	24.973	65.77
750	26.499	67.57
780	29.015	70.14
810	31.76	72.67
840	34.785	75.50
870	38.11	78.59
900	41.978	80.23
930	46.501	82.17
960	48.677	83.15
990	52.98	85.07
1020	52.979	85.07