The pH of buffers based on 2-amino-2-hydroxymethyl-1,3-propanediol ('tris') in synthetic sea water

被引：162

作者：

DelValls, TA ^{[1
]}

Dickson, AG ^{[1
]}

机构：

[1] Univ Calif San Diego, Scripps Inst Oceanog, Marine Phys Lab, La Jolla, CA 92093 USA

来源：

DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS | 1998年 / 45卷 / 09期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0967-0637(98)00019-3

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

E.m.f. measurements were made over the temperature range 273.15-338.15 K, and at five salinities from 20 to 40, using the cell [GRAPHICS] where p(o) = 101.325 kPa, and BH+ and B are the conjugate acid-base pair of 2-amino-2-hydroxymethyl-1,3-propanediol ('tris') - each present at a concentration of 0.04 mol kg(-1). The results were used to assign pH values based on the 'total' hydrogen ion scale to such buffer solutions based on this acid-base pair. Additional measurements were made over a range of buffer concentrations at a salinity of 35; these were used to calculate the stoichiometric (ionic medium) dissociation constant for 'tris-H+' in synthetic sea water. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：1541 / 1554

页数：14

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