COMBINED AND FREE CHLORINE MEASUREMENT THROUGH ELECTROCHEMICAL MICROSENSORS

摘要

One embodiment provides a method, including: initiating, at a generator electrode in an electrode array having a collector electrode adjacent to but physically separate from the generator electrode, a reduction reaction for an oxygen containing species and a monochloramine species present in a water sample; said initiating comprising generating, at the generator electrode, a generator current producing the reduction reaction; detecting, at the collector electrode, a collector current associated with products formed from the reduction reaction; wherein the electrode array is biased to preferentially detect one or more products of the reduction reaction; and determining, by comparing the generator current with the collector current, concentrations of oxygen containing species and monochloramine species present in the water sample.