US 12,227,433 B2
Electrical frequency response fluid analysis
Tahir Cader, Liberty Lake, WA (US); Greg Scott Long, Corvallis, OR (US); John Franz, Houston, TX (US); and Gardson Githu, Los Angeles, CA (US)
Assigned to Hewlett Packard Enterprise Development LP, Spring, TX (US)
Appl. No. 15/569,650
Filed by Hewlett Packard Enterprise Development LP, Houston, TX (US)
PCT Filed Feb. 19, 2016, PCT No. PCT/US2016/018681
§ 371(c)(1), (2) Date Oct. 26, 2017,
PCT Pub. No. WO2017/142553, PCT Pub. Date Aug. 24, 2017.
Prior Publication US 2018/0111846 A1, Apr. 26, 2018
Int. Cl. G01N 27/02 (2006.01); A61L 2/18 (2006.01); C02F 1/00 (2023.01); G01N 33/18 (2006.01); C02F 1/50 (2023.01); C02F 1/66 (2023.01); C02F 103/02 (2006.01); G01N 27/416 (2006.01)
CPC C02F 1/008 (2013.01) [A61L 2/18 (2013.01); A61L 2/186 (2013.01); G01N 27/026 (2013.01); G01N 33/18 (2013.01); A61L 2202/14 (2013.01); C02F 1/50 (2013.01); C02F 1/66 (2013.01); C02F 2103/023 (2013.01); C02F 2209/005 (2013.01); C02F 2209/06 (2013.01); C02F 2303/04 (2013.01); C02F 2303/08 (2013.01); G01N 27/4167 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A system comprising:
an electrochemical sensor having two electrodes that, in operation, are inserted into a fluid to be tested, wherein an alternating current (AC) voltage is applied across the two electrodes;
a potentiostat that, in operation, determines a measured electrical response of the fluid across the two electrodes; and
a frequency response analyzer that, in operation, analyzes the measured electrical response determined using the two electrodes across multiple frequencies, stores a baseline electrical response across the multiple frequencies, and determines from the baseline electrical response and the measured electrical response whether the measured electrical response is outside a predetermined range.