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

Autor: Roy LN, Roy RN, Lenoue SR, Denton CE, Fuge MS, Dunseth CD, Roy CN, Hayden SM, Wollen JT, Sreepada K
Jazyk: angličtina
Zdroj: Journal of solution chemistry [J Solution Chem] 2009 Apr 01; Vol. 38 (4), pp. 459-469.
DOI: 10.1007/s10953-009-9379-2
Abstrakt: 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 degrees C including 37 degrees 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 degrees C after correcting the liquid junction potentials with the flowing junction cell.
Databáze: MEDLINE