Briefly, the procedure described by Hayeeyeet al., 2014, is as follows. A series of 50 mL of 0.1 M NaCl solution was adjusted to desire from 2 to 12, by using 0.01 M HCl or NaOH. A series of 50 mL of 0.1 M NaCl solution was adjusted to desire from 2 to 12, by using 0.01 M HCl or NaOH.