Halder, N and Guha, S K (1980) Development of blood capillary glass electrodes for use in medical electronics. Transactions of the Indian Ceramic Society, 39 (2). pp. 52-56. ISSN 0371-750X

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Blood capillary glass electrode, a recent development in medical electronics is used in conjunction with anaesthesia monitoring equipment to observe and record the hydrogen ion concentration of blood, particularly when the patient undergoes a surgical operation. With a view to develop the electrode, a systematic investigation was undertaken using the glasses from the following systems (i) Na20-Ca0-Si02, (ii) Li20-Ca0-Si02, (iii) Li20-La203-Cs20- Si0., (iv) Li20-La203-Ba0-Ce02-Si02• The glasses were melted and capillary tubes were drawn. Keeping in view the monitoring system in medical electronics, an arrangement was set up for ascertaining the suitability of the capil lary fibres made out of the glass for pH measurement. It was found that only glass no. (iii) responded to the acti- vity of hydrogen ions and produced slope values very close to the ideal Nurnst value at room temperature when the measured emf data were plotted against the corresponding pH showing thereby that the remaining three glasses were not suitable for making defect-free capillary fibres although the glasses were well known for manufacturing pH electrodes. Further, the sodium ion error of the glass selected was very low such that voltage departure could be recorded ouly after pH 12.5. With a suitable correction chart for sodium ion error, the electrodes were found to work satisfactorily up to pH 14. The D.C. impedance of the capillary were within the order of 108 ohms which showed their capability to work with ordinary potentiometer.

Item Type: Article
Subjects: Glass
Depositing User: Bidhan Chaudhuri
Date Deposited: 25 May 2016 11:27
Last Modified: 25 May 2016 11:27
URI: http://cgcri.csircentral.net/id/eprint/3414

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