公开(公告)号：US20210102914A1

公开(公告)日：2021-04-08

申请号：US17127296

申请日：2020-12-18

Applicant: Hach Company

Inventor： Corey Salzer ,  Vishnu Rajasekharan ,  Dan Kroll ,  John Lee

IPC: G01N27/404 ,  G01N27/49 ,  G01N33/18 ,  G01N27/407

Abstract: An embodiment provides an amperometric sensor, including: a housing containing an inner fill solution; an electrode bathed in the inner fill solution; and a membrane in intimate contact with the electrode; the electrode being formed as a non-compact or porous structure on the membrane; whereby a spatial relationship of the electrode and the membrane is constant. Other embodiments are described and claimed.

公开(公告)号：US11029280B2

公开(公告)日：2021-06-08

申请号：US15745586

申请日：2017-06-22

Applicant: HACH COMPANY

Inventor： Dan Kroll ,  Corey Salzer

IPC: G01N27/44 ,  G01N27/30 ,  G01N27/416 ,  G01N31/16 ,  G01N33/18 ,  G01N27/42

Abstract: An embodiment provides a method for determining the alkalinity of an aqueous sample using an alkalinity sensor, including: monitoring the pH of an aqueous sample using a pH sensor in a sample cell, the pH sensor including a pH sensor electrode made of boron-doped diamond; generating hydronium ions, using a hydronium generator, in the aqueous sample in the sample cell, the hydronium generator including a hydronium-generating electrode; changing the pH of the aqueous sample by causing the hydronium generator to generate an amount of hydronium ions in the aqueous sample; quantifying and converting a current or charge to the number of hydronium ions produced to an end point of the electrochemical titration, the end point correlating to the alkalinity of a sample; and analyzing the alkalinity of the aqueous sample based on the generated amount of hydronium ions and the resulting change in pH monitored by the pH sensor.