公开(公告)号：US20180292348A1

公开(公告)日：2018-10-11

申请号：US15766806

申请日：2016-10-07

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：US20180224397A1

公开(公告)日：2018-08-09

申请号：US15745586

申请日：2017-06-22

Applicant: HACH COMPANY

Inventor： Dan J Kroll ,  Corey SALZER

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

CPC classification number: G01N27/44 ,  G01N27/302 ,  G01N27/308 ,  G01N27/4167 ,  G01N27/423 ,  G01N31/164 ,  G01N33/182

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.