Discuss proper operation and maintenance of glass pH electrodes.

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Chemistry

Discuss proper operation and maintenance of glass pHelectrodes.

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Proper Operation The glass electrode can be used with strong acids however it is attacked by strong alkaline solutions Therefore glass electrodes should never be left in alkaline solutions for longer than is necessary to measure the pH The glass electrode responds rapidly to large pH changes in buffered solutions but the response is slower in poorly buffered or unbuffered solutions Equilibrium is reached slowly and may require several seconds Poorly buffered solutions should be stirred vigorously during measurement to prevent stagnation at the electrode Measurements can be made in partly aqueous solutions but the degree of hydration of the outer surface of the membrane will alter the potential across the membrane Hence values obtained in nonaqueous or highly ionic solutions will be incorrect Maintenance of Glass pH electrodes Many types of pH electrode are See Answer

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