PH MEASUREMENT IN CONCENTRATED ALKALINE-SOLUTIONS

PH MEASUREMENT IN CONCENTRATED ALKALINE-SOLUTIONS
复制标题

DOI:
10.1021/ac50001a045
复制
发表时间:
1985-01-01
影响因子:
7.4
通讯作者:
LICHT, S
LICHT, S
中科院分区:
化学1区
文献类型:
--
作者:
LICHT, S

文献摘要

被引文献

相似文献

在本研究中,玻璃电极水溶液pH测量范围扩大至pH 17.6。分析了与高 pH 测量相关的传统问题,包括液体接界和阳离子误差以及电极的腐蚀。无液接池(Beckman 39137 阳离子电极)[样品| Ą辐射计G202BH pH电极)可以测量阳离子对pH的误差。包含各自测得的 0.1、0.4 和 0 后,带有液接界的 pH 池(Radiometer G202BHpH 电极|| 样品 | Radlometer K401 饱和甘汞电极)在 25.0 C 下对于 7.5、12 和 17.5 m KOH 溶液产生 15.6、16.6 和 17.6 的 pH 值。 9 pH 单位钾离子校正。计算值和测量值的 pH 值在 0.1 pH 单位内一致。在 pH 16.0 时,分别测量 Ó 的额外阳离子 pH 误差为 0.1 和 0.5 pH 单位。 01 m 钠离子和锂离子浓度。在 17.5 m KOH 溶液中浸泡 100 小时对 pH 电极没有产生明显影响。
In this study, the rangeof glass electrode aqueous pH mea-surements Is extended to pH 17.6. Traditional problems as-sociated with high pH measurement, Including liquid Junction and cation errors and attack of the electrode, are analyzed. A liquid junctionfree cell (Beckman 39137 cationic elec-trode)[sample| ĄRadiometer G202BH pH electrode) can measure cation error on pH. A pH cell with liquid junction (Radiometer G202BHpH electrode|| sample| Radlometer K401 saturated calomel electrode) yields at 25.0 C pH values of15.6, 16.6, and 17.6 for 7.5, 12, and 17.5 m KOH solutions, after Inclusion of the respective measured 0.1, 0.4, and0. 9 pH unit potassium Ion correction. Calculated and measured pH values agree within 0.1 pH unit. At pH 16.0 an additional cation pH error of 0.1 and 0.5 pH unit Is measured respectively for Ó. 01 m sodium and lithium Ion concentrations. One hundred hours of Immersion In 17.5 m KOH solutionproduced no significant effect on the pH electrode.