Table 2.

Taguchi design and results for batch extraction.

Run	Particle size (mm)	Time (min)	Solid-to-solvent ratio (g/mL)	Temperature (°C)	TPC yield (mg GAE/g plant material)	S/Na ratio (dB)
1	0.150	15	1:20	25	5.109 ± 0.17	14.1667
2	0.150	30	1:30	35	10.105 ± 1.10	20.090
3	0.150	45	1:40	45	11.923 ± 1.03	21.527
4	0.150	60	1:50	55	17.268 ± 0.92	24.745
5	0.212	15	1:30	45	7.389 ± 1.00	17.372
6	0.212	30	1:20	55	8.882 ± 1.10	18.970
7	0.212	45	1:50	25	7.359 ± 0.15	17.336
8	0.212	60	1:40	35	9.915 ± 0.38	19.925
9	0.425	15	1:40	55	6.760 ± 0.14	16.598
10	0.425	30	1:50	45	7.752 ± 0.75	17.788
11	0.425	45	1:20	35	6.191 ± 0.26	15.835
12	0.425	60	1:30	25	4.535 ± 0.27	13.131
13	0.600	15	1:50	35	3.519 ± 0.52	10.928
14	0.600	30	1:40	25	3.488 ± 0.42	10.851
15	0.600	45	1:30	55	6.053 ± 0.55	15.639
16	0.600	60	1:20	45	4.102 ± 0.95	12.259

^aS/N ratio: Signal-to-noise ratio.