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A convenient calibration method for pH measurements in monoethylene glycol (MEG) + water solvents is described. The calibration has to be performed once for each electrode type. pH measurements were performed in CO 2 (g, ∼1 bar)-saturated solutions of 60 and 90 wt % MEG at 4−80 °C with varying NaHCO 3 and KHCO 3 contents. Reproducible data were obtained using several different electrodes. Theoretical aspects are reviewed.
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Sandengen et al. (2007) studied this question.
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