The glass electrode. The study of various characteristics
The glass electrode. The study of various characteristics
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DOI：
10.1021/ja01359a022
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发表时间：
1931-05-01
影响因子：
15
通讯作者：
DeEds, F
中科院分区：
文献类型：
--
作者：
Kahler, H;DeEds, F
作者研究了为什么厚玻璃膜给出了溶液pH值的错误值的问题。对于给定的支撑管，与理论值的偏差与膜的阻力成比例，除非遵守某些预防措施。浸没玻璃与非浸没玻璃在浸没线上方的电阻比应尽可能小。如果在膜和支撑管的内部和外部使用相等的润湿面积，则阻力效应在很大程度上被克服。发现浸没线上方的吸湿膜会引起偏差。Na玻璃的Na离子效应在pH 3.97和12.55之间很小。介绍了石蜡、沥青和其他材料涂层的使用。
The authors investigated the question of why thick glass membranes have given incorrect values for the pH of solutions. The deviation from the theoretical value is proportional to the resistance of the membrane for a given supporting tube unless certain precautions are observed. The resistance ratio of immersed glass to non-immersed glass just above the line of immersion should be as small as possible. If equal wetted areas are used on both inside and outside the membrane and supporting tube the resistance effect is largely overcome. A hygroscopic film above the line of immersion is found to give rise to the deviations. The Na ion effect for Na glasses is small between pH 3.97 and 12.55. The use of coatings of paraffin, asphalt and other materials is described.