title: Buffer Standards for the Physiological pH of the Zwitterionic Compound, ACES from 5 to 55°C.
abstract: The values of the second dissociation constant pK2and related thermodynamic quantities of [N-(2-acetamido)-2-aminoethanesulfonic acid] (ACES) have already been reported over the temperature range 5 to 55°C including 37°C. This paper reports the paHvalues of four chloride ion free buffer solutions and eight buffer solutions withI= 0.16 mol·kg-1, matching closely to that of the physiological sample. Conventional paHvalues for all twelve buffer solutions from 5 to 55°C, are reported. The residual liquid junction potential correction for two widely used temperatures, 25 and 37°C, has been made. The flowing-junction calomel cell method has been utilized to measureEj, the liquid junction potential. The operational pH values for four buffer solutions at 25 and 37°C are calculated using the physiological phosphate buffer standard based on NBS/NIST convention. These solutions are recommended as pH standards in the pH range of 6.8 to 7.2 for physiological fluids.
authors.forename: Rabindra N
authors.initials: RN
authors.lastname: Roy
authors.forename: Lakshmi N
authors.initials: LN
authors.lastname: Roy
authors.forename: Michael S
authors.initials: MS
authors.lastname: Fuge
authors.forename: Chandra N
authors.initials: CN
authors.lastname: Roy
authors.forename: Curtis A
authors.initials: CA
authors.lastname: Himes
authors.forename: Paul A
authors.initials: PA
authors.lastname: Bryant
authors.forename: Kyle T
authors.initials: KT
authors.lastname: Robinson
authors.forename: Daniel A
authors.initials: DA
authors.lastname: Kaufmann
authors.forename: Colby H
authors.initials: CH
authors.lastname: Grove
authors.forename: Toshi
authors.initials: T
authors.lastname: Ghosh
authors.forename: Adonis
authors.initials: A
authors.lastname: Bwashi