Table S2.

Composition of acetic acid and sodium acetate buffer solution at various pH values

pH	0.2 M NaAc (mL)	0.3 M HAc (mL)	pH	0.2 M NaAc (mL)	0.3 M HAc (mL)
2.6	0.75	9.25	4.8	5.90	4.10
3.8	1.20	8.80	5.0	7.00	3.00
4.0	1.80	8.20	5.2	7.90	2.10
4.2	2.65	7.35	5.4	8.60	1.40
4.4	3.70	6.30	5.5	9.10	0.90
4.5	4.90	5.10	5.8	9.40	0.60

Note: Bold text denotes the compostitons of PBS or HAc-NaAc buffer solution at pH 4.5, 5.5, 6.5, 7.4 that were employed in the manuscript.