Patent ID: 6146514
Filing Date: 2000-11-14
Classification: G01N

Abstract:
An acidity measuring apparatus, comprising:a measuring container, wherein the measuring container contains an electrolyte solution including one of a 1,2-benzoquinone derivative and a 1,4-benzoquinone derivative both having side chains on the benzene ring, an organic solvent, an electrolyte and an acid-containing subject for measurement;a working electrode, a counter electrode and a reference electrode section provided in the measuring container and immersed in the electrolyte solution; anda control section for sweeping a potential of the working electrode within a prescribed range and for detecting a value of a pre-peak current generated by the acid and flowing between the working electrode and the counter electrode,wherein the 1,2-benzoquinone derivative is 3,5-di-tert-butyl-1,2-benzoquinone and the 1,4-benzoquinone derivative is 2,6-dimethyl-1,4-benzoquinone.