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Journal of Solution Chemistry

, Volume 38, Issue 4, pp 459–469 | Cite as

Buffer Standards for the Physiological pH of the Zwitterionic Compound, DIPSO, from 5 to 55 °C

  • Lakshmi N. Roy
  • Rabindra N. Roy
  • Sean R. LeNoue
  • Cole E. Denton
  • Michael S. Fuge
  • Craig D. Dunseth
  • Chandra N. Roy
  • Shawn M. Hayden
  • Joshua T. Wollen
  • Kripa Sreepada
Article

Abstract

The values of the second dissociation constant, pK 2, and related thermodynamic quantities of 3-[N,N-bis (2-hydroxyethyl)amino]-2-hydroxypropanesulfonic acid (DIPSO) have already been reported over the temperature range 5 to 55 °C including 37 °C. This paper reports the pH values of four NaCl-free buffer solutions and four buffer composition containing NaCl salt at I=0.16 mol⋅kg−1. Conventional pa H values are reported for all eight buffer solutions. The operational pH values have been calculated for four buffer solutions recommended as pH standards, at 25 and 37 °C after correcting the liquid junction potentials with the flowing junction cell.

Keywords

Buffers DIPSO Liquid junction Ionic strength Emf Zwitterions pH Acidity function 

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Lakshmi N. Roy
    • 1
  • Rabindra N. Roy
    • 1
  • Sean R. LeNoue
    • 1
  • Cole E. Denton
    • 1
  • Michael S. Fuge
    • 1
  • Craig D. Dunseth
    • 1
  • Chandra N. Roy
    • 1
  • Shawn M. Hayden
    • 1
  • Joshua T. Wollen
    • 1
  • Kripa Sreepada
    • 1
  1. 1.Hoffman Department of ChemistryDrury UniversitySpringfieldUSA

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