| http://www.w3.org/ns/prov#value | - In FIG. 3, 90 is a sample to be measured. 91 is a cell. 92 is a solution of an electrolytic liquid. 93 is a working electrode probe. 94 is a counter electrode composed of platinum etc. 95 is a reference electrode for determining the electrical potential of probe 93. 96 is potentiostat. 97 is an amplifier to amplify electric current from potentiostat 96. 99 is a piezoelectric scanner for scanning s
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