pH MEASUREMENT OF AN AQUEOUS SAMPLE

A method for measuring pH in an aqueous sample with a carbon region electrode, comprising:

• introducing an aqueous sample into a measurement device, wherein the measurement device comprises:
• a primary electrode comprising a boron doped diamond-based electrode and a primary carbon region with a primary carbon region surface area, wherein the primary carbon region comprises a pH sensitive sp2 carbon region;
• a secondary electrode comprising a boron doped diamond-based electrode and a secondary carbon region with a secondary carbon region surface area less than the primary carbon region surface area;
• at least one reference electrode;
• at least one auxiliary electrode;
• and
• identifying a pH of an aqueous sample by measuring an electrical potential between the at least one reference electrode and at least one of:
• the primary electrode and the secondary electrode.

A system for measuring pH in an aqueous sample, comprising:

• a storage device having code stored therewith, the code being executable by the processor and comprising:
• code that introduces an aqueous sample into a measurement device, wherein the measurement device comprises:
• a primary electrode comprising a boron doped diamond-based electrode and a primary carbon region with a primary carbon region surface area, wherein the primary carbon region comprises a pH sensitive sp2 carbon region;
• a secondary electrode comprising a boron doped diamond-based electrode and a secondary carbon region with a secondary carbon region surface area less than the primary carbon region surface area;
• at least one reference electrode;
• at least one auxiliary electrode;
• and
• code that identifies a pH of an aqueous sample by measuring an electrical potential between the at least one reference electrode and at least one of:
• the primary electrode and the secondary electrode.