US 12,222,319 B2
Repeated cycles square wave voltammetry
David Langley Rick, Longmont, CO (US)
Assigned to HACH COMPANY, Loveland, CO (US)
Filed by Hach Company, Loveland, CO (US)
Filed on Mar. 18, 2022, as Appl. No. 17/698,263.
Prior Publication US 2023/0296560 A1, Sep. 21, 2023
Int. Cl. G01N 27/48 (2006.01); G01R 19/02 (2006.01)
CPC G01N 27/48 (2013.01) [G01R 19/02 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for measuring a component of an aqueous sample using square wave voltammetry, comprising:
introducing the aqueous sample to a chamber of a square wave voltammetry apparatus;
applying a stimulus voltage step to the aqueous sample, wherein the stimulus voltage comprises a staircase voltage, wherein each step of the staircase voltage defines a group and comprises two or more repeated square wave modulations of equal voltage amplitude to the same voltage;
measuring a resultant current output resulting from the stimulus voltage, wherein the measuring comprises square wave voltammetry; and
averaging the resultant current output across the two or more repeated square wave modulations of the group, wherein the averaging consists essentially of separating the resultant current output into a positive half cycle resultant current output and a negative half cycle resultant current output, each of which is passed thru a finite impulse response filter.