Analytical Characteristics Study of Glass Electrode based pH Measurement System in Respect of mV Output and Internal Resistance
M.L. Dongare1, M. N. Awatade2, A. D. Shaligram3, A.S. Burungale4
1M.L. Dongare, Department of Electronic Science, S.M. Joshi College Hadapsar, Pune (Maharashtra). India.
2M. N. Awatade, Hi Physix Laboratory India Pvt. Ltd. Ranjangaon MIDC Tal Shirur Dist Pune, (Maharashtra). India.
3A. D. Shaligram, Department of Electronic Science, Savitribai Phule Pune University Pune, Pune (Maharashtra). India.
4A.S. Burungale, S.M.Joshi College Hadapsar Pune, Pune (Maharashtra). India.
Manuscript received on June 01, 2016. | Revised Version Manuscript Received on June 19, 2016. | Manuscript published on June 20, 2016. | PP: 13-15 | Volume-1 Issue-12, February 2016
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Abstract: In tradition, pH measurement methods falls in to four categories, such as indicator reagents,, pH test strips, metal electrode methods(hydrogen electrode, quin hydrone electrode and antimony electrode method) and glass electrode. Glass electrode is one of the well known, inexpensive, easily available and commercially available method. However the use of these measurement type is subject to various sources of uncertainties and having limitation in many industrial applications. At present, pH sensitive glass electrodes are commonly used for determining the hydrogen ion concentration. A hydrated layer (gel layer) of around 10-4 mm is developed on the sensitive glass membrane from inside and outside when dipped in aqueous solution. However, there are unexplored avenues in the knowledge of physical mechanism in the formation of hydrated layer, potential developed, nature and different characteristics, methods of its thickness measurement etc. From the review, it is noted that electrical characterization technique may lead to better results with regard to the understanding of the basic physical mechanism in the pH sensitive glass electrodes. Hence the electrical parameter measurement technique is used and is reported in this paper.
Keywords: Glass electrode, pH sensor, electrical characterization, resistance, current.