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Fig. 2. Ion selective microelectrode. A. Artificial diffusional-source arena for calibrating a scanning ion-selective electrode (SIET). B. Probe tip with ion-selective liquid ion exchanger (LIX), electrolyte and Ag/AgCl wire in place. C. Old 3DVIS 3-D sampling protocol using oscillating motion. D. New ASET 3-D sampling rule approach. |