. . "Electrochemical device sensitive to the concentration of H+ ions in solution that allows direct measurement of pH."@en . "accepted"@en . "pH electrode"@en . "SDN:S04::S04277" . . . "1" . "2006-10-02 18:26:59.0" . "false" . "SDN:S04::S04277" . . . "2006-10-02 18:26:59.0" . "1" . "" . . "SDN:S04::S04277" . . .