US 12,241,862 B2
Electrochemical sensor for lead detection
Rohan Akolkar, Beachwood, OH (US); Xinyu Liu, Cleveland, OH (US); and Kailash Venkatraman, Beachwood, OH (US)
Assigned to CASE WESTERN RESERVE UNIVERSITY, Cleveland, OH (US)
Filed by CASE WESTERN RESERVE UNIVERSITY, Cleveland, OH (US)
Filed on Sep. 21, 2021, as Appl. No. 17/480,845.
Application 17/480,845 is a continuation in part of application No. 16/255,486, filed on Jan. 23, 2019, granted, now 11,125,717.
Claims priority of provisional application 62/620,786, filed on Jan. 23, 2018.
Prior Publication US 2022/0011263 A1, Jan. 13, 2022
Int. Cl. G01N 27/42 (2006.01); G01N 33/18 (2006.01)
CPC G01N 27/42 (2013.01) [G01N 33/1813 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A sensor for detecting lead in an aqueous solution, the sensor comprising:
a copper working electrode for placement in the aqueous solution,
a counter electrode for placement in the aqueous solution,
a power supply for applying underpotential deposition of lead (Pbupd) onto the copper electrode,
a measuring device for providing measurement of a hydrogen evolution reaction (HER) current on a Pbupd-modified electrode, and
a controller configured to correlate the degree of suppression of the HER current to Pbupd coverage to determine the lead coverage and lead concentration of the solution.