CRCU

Chemical Research in Chinese Universities ›› 2004, Vol. 20 ›› Issue (1): 36-39.

• Articles • Previous Articles     Next Articles

Studies on Complexation of ATMP, PBTCA, PAA and PMAAA with Ca2+ in Aqueous Solutions

WEN Rui-mei1, DENG Shou-quan2, ZHU Zhi-liang2, FAN Wei2, ZHANG Ya-feng2   

  1. 1. School of Electronics and Information Engineering;
    2. School of Enviromental Science and Engineering, Tongji University, Shanghai 200092, P. R. China
  • Received:2003-01-15 Online:2004-02-24 Published:2011-08-06

PDF (PC)

Abstract: By means of acid-base potentiometric titration and the advanced BEST computer program developed by Martell et al., the deprotonation constants of four inhibitors[Aminotrimethylenephosphoinic acid(ATMP), 2-phosphino-tutane-1,2,4-tricarboxylic acid(PBTCA), polyacrylic acid(PAA, Mw＝2000), poly(maleic, acrylic) acid(PMAAA, Mw＝3000)], and the stability constants of the complexes of these inhibitors with Ca2+ have been determined. And the distribution curves of ATMP at different pH values in aqueous solutions have also been given out. The result of this study can be applied to explaining the inhibition mechanism.

Key words: Stability constants, BEST computer program, Inhibition mechanism