Buffer Standards for the Biological pH of the Amino Acid N-[2-Hydroxyethyl]piperazine-N鈥?[3-propanesulfonic acid], HEPPS, From (278.15 to 328.15) K

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• 作者：Lakshmi N. Roy ; Rabindra N. Roy ; Joshua T. Wollen ; Meagan A. Harmon ; Jessica M. Stegner ; Ankita A. Shah ; Isaac B. Henson
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2011
• 出版时间：November 10, 2011
• 年：2011
• 卷：56
• 期：11
• 页码：4126-4132
• 全文大小：727K
• 年卷期：v.56,no.11(November 10, 2011)
• ISSN：1520-5134

文摘

For the HEPPS buffer under investigation, there are seven buffer solutions without NaCl and eight buffer solutions that contain Cl^{鈥?/sup> and have an ionic strength (<i>Ii> = 0.16 mol路kg鈥?) that is similar to that of blood plasma. These buffer solutions have been evaluated in the temperature range of (278.15 to 328.15) K using the extended Debye鈥揌眉ckel equation and the Bates鈥揋uggenheim convention. The previously determined <i>Ei>_<i>ji> values have been used to determine the operational pH values of HEPPS buffer solutions at (298.15 and 310.15) K. These are recommended as secondary standard reference solutions for pH measurements in saline media with an isotonic ionic strength of <i>Ii> = 0.16 mol路kg鈥?.}