Table 4.

Results of the pH, particle size, zeta potential, absolute recovery, and entrapment efficiency for the 2^11–6 fractional factorial design

Exp	pH	PS (nm)	ζ (mV)	AR (%)	EE (%)
1	4.46	336.0	−14.6	44.6	98.7
2	6.43	UNC	−14.53	96.9	100.5
3	5.17	226.4	15.90	16.0	99.4
4	6.48	367.0	−20.18	44.3	97.9
5	4.47	264.5	−14.12	69.7	97.4
6	6.15	323.0	−29.24	101.5	98.6
7	7.00	516.0	−35.98	107.0	99.0
8	5.76	124.7	−14.53	98.9	98.0
9	4.87	269.7	−18.52	39.7	100.7
10	4.31	597.0	8.01	14.5	97.3
11	4.85	344.0	−18.31	69.6	98.2
12	6.50	174.2	−25.06	97.2	100.3
13	6.41	97.6	−3.40	73.8	98.1
14	6.20	752.0	−19.91	104.5	88.1
15	5.45	533.0	−20.10	79.2	97.8
16	4.75	169.8	−21.17	89.5	99.9
17	4.92	657.0	−39.97	88.2	99.6
18	6.03	137.7	−20.15	99.5	94.4
19	6.10	156.6	−21.06	113.6	84.2
20	6.37	235.6	−42.62	94.3	99.6
21	5.20	83.4	−19.34	105.1	98.6
22	6.42	UNC	13.94	91.1	94.2
23	6.50	241.8	−24.92	90.3	90.8
24	4.88	119.7	−18.49	94.0	98.4
25	6.56	139.2	−18.68	40.8	88.6
26	6.33	727.0	−94.01	40.9	101.1
27	4.50	267.6	−19.20	7.9	105.9
28	5.70	99.6	−15.30	46.2	92.8
29	5.48	821.0	−19.98	70.8	87.8
30	5.95	186.4	−20.84	86.9	91.9
31	4.80	155.0	−20.80	78.7	95.7
32	5.05	517.0	−23.85	103.1	99.0

Abbreviations: AR, absolute recovery; EE, entrapment efficiency; exp, experiment; PS, particle size; UNC, uncertain; ζ, zeta potential.