| Autor: |
Roy RN, Roy LN, Fuge MS, Roy CN, Himes CA, Bryant PA, Robinson KT, Kaufmann DA 2nd, Grove CH, Ghosh T, Bwashi A |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of solution chemistry [J Solution Chem] 2009 Apr 01; Vol. 38 (4), pp. 471-483. |
| DOI: |
10.1007/s10953-009-9380-9 |
| Abstrakt: |
The values of the second dissociation constant p K 2 and 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 pa H values of four chloride ion free buffer solutions and eight buffer solutions with I = 0.16 mol·kg -1 , matching closely to that of the physiological sample. Conventional pa H values 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 measure E j , 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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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