polarograph noun. [pǝ(ʊ)'lɑ:rǝgrɑ:f, 'pǝʊlǝr-] Also *Polarograph. E20.
[from POLAR(IZATION + -O- + -GRAPH.]
Chemistry. (US proprietary name for) an apparatus for automatic chemical analysis in which a sample is electrolysed at successively higher voltages and the resulting current plotted against voltage to give a polarogram (cf. POLAROGRAM).

■ polaro'graphic adjective E20.

■ polaro'graphically adverb M20.

■ polarography [pǝʊlǝ'rɒgrǝfi] noun the technique of using a polarograph M20.

[TahlilGaran] English Dictionary ▲