Browsing by Author "Manning, Gary D."

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    pH calibration of tetroxalate, tartrate and phthalate buffer solutions at above 100°C
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1978, 74 (09-12), 1978) Manning, Gary D.
    The pHS of three standard buffer solutions has been measured using a hydrogen electrode against a silver–silver chloride electrode in a cell nominally without a liquid–liquid junction. The measurements have been carried out at 95–120°C in 0.05 mol kg–1 potassium tetroxalate, 100–160°C in saturated (25°C) potassium hydrogen tartrate and 100–200°C in 0.05 mol kg–1 potassium hydrogen phthalate solution. It has been shown that the method cannot be used to calibrate phosphate or borate buffers at >100°C because of excessive reduction of silver chloride by hydrogen, although such solutions remain useful buffers at elevated temperatures.