Impact of Grinding and Sorting Particle Size on Phytochemical Yield in Dipterocarpus alatus Leaf Extract

Table 1

Effect of size reduction with a hammer mill and continuous grinding with a pin mill on the percentage of each particle size.

Treatments		Percentage of particles through different sieve sizes
Sieve size (mm)	Feeding rate (kg min^−1)	2.360 (mm)	1.180 (mm)	0.600 (mm)	0.300 (mm)	0.150 (mm)	0.075 (mm)	0.038 (mm)	Pan
Size reduction with a hammer mill
3	6	24.67	46.22	14.55	6.22	2.89	2.00	1.67	1.78
Grinding with a pin mill
1.0 mm	1	0	0	11.77	47.43	17.23	9.57	6.57	7.43
	2	0	0	15.90	42.77	16.90	10.57	7.10	6.77
	3	—	—	—	—	—	—	—	—
	4	—	—	—	—	—	—	—	—
	5	—	—	—	—	—	—	—	—
1.5 mm	1	0	0	25.10	39.33	15.47	9.23	5.77	5.10
	2	0	0	37.00	31.77	11.90	8.00	5.23	6.10
	3	0	0	38.33	31.33	12.57	7.77	5.10	4.90
	4	—	—	—	—	—	—	—	—
	5	—	—	—	—	—	—	—	—
3.0 mm	1	0	10.67	47.00	24.13	8.77	5.1	2.56	1.78
	2	0	17.10	44.33	20.90	7.77	5.23	2.44	2.22
	3	0	23.10	40.33	19.23	7.90	5.1	2.44	1.89
	4	0	27.10	38.33	17.90	7.23	4.77	2.78	1.89
	5	0	31.57	35.73	16.79	6.90	4.57	2.56	1.89

Note. — means the machine is breaking down.