JEB -- Rheault and O’Donnell 204 (13): 2289 Figure IG2

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Fig. 2. Calibration curve for K⁺ microelectrodes in KCl solutions of 1–600 mmoll^-1. Data points are mean responses ± S.E.M. of four different electrodes; standard errors are smaller than the symbol used. The solid line (slope 52.7mV per decade) is the linear regression (r²=0.992, P=0.0002).