The values of the second dissociation constant, pK2, 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 paH 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.

中文翻译：

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用于两性离子化合物 DIPSO 生理 pH 值的缓冲标准液，温度范围为 5 至 55 °C

3-[N,N-双(2-羟乙基)氨基]-2-羟基丙磺酸 (DIPSO) 的第二解离常数 pK2 和相关热力学量的值已经在 5 到 55° 的温度范围内报告C 包括 37 °C。本文报告了四种不含 NaCl 的缓冲溶液和四种含有 NaCl 盐的缓冲组合物在 I=0.16 mol·kg−1 时的 pH 值。报告了所有八种缓冲溶液的常规 paH 值。在 25 和 37 °C 下，使用流动连接池校正液接电位后，计算了四种推荐作为 pH 标准的缓冲溶液的操作 pH 值。