Determination of complex 12-grade phytic acid dissociation constants

作者：Zhang H; Xue H^*; Yang J; Liang L

来源：Bulgarian Chemical Communications, 2015, 47(1): 22-29.

• phytic acid
• potentiometric titration
• dissociation constants
• cumulative dissociation constants
• ionization degrees

The potentiometric method was used to titrate hydrochloric acid with sodium phytate using a combined pH electrode. Four groups of 12-grade dissociation constants, cumulative dissociation constants and ionization degrees of phytic acid were calculated according to the changes in the pH value and the related substance concentration in the titration process. A group of 12-grade relatively reasonable dissociation constants K-a, cumulative dissociation constants beta and ionization degrees alpha of phytic acid was selected, with K-a values between 10(-10) and 10(10), beta values in the range of 10(-12) to 10(27), and alpha values from 10(-5) to 1. The data are relatively objective and reasonable and provide a theoretical basis for in-depth research on phytic acid.

• 出版日期2015
• 单位蚌埠医学院