公开(公告)号：US12013368B2

公开(公告)日：2024-06-18

申请号：US17253474

申请日：2019-07-24

Applicant: HACH COMPANY

Inventor： Vishnu Rajasekharan ,  Russell Young ,  Richard Leggett ,  Seamus O'Mahony

IPC: G01N27/416 ,  G01N21/80 ,  G01N27/30 ,  G01N31/00 ,  G01N31/22 ,  G01N33/18

CPC classification number: G01N27/4167 ,  G01N21/80 ,  G01N27/302 ,  G01N31/005 ,  G01N31/221 ,  G01N33/1846

Abstract: An embodiment provides a method for measuring at least one characteristic of an aqueous sample, including: introducing an aqueous sample into a measurement device comprising one or more electrodes; oxidizing a transition metal to produce a higher valent metal by applying an electrical potential between an anode and a cathode of the measurement device; oxidizing, using the higher valent metal as a catalyst, a material within the aqueous sample; measuring a characteristic of the aqueous sample based upon the oxidized material, using a measurement device selected from the group consisting of: an electrochemical measurement device and an optical measurement device; and optimizing the electrical potential and at least one reagent delivered to the measurement device based on the measurement of the characteristic. Other aspects are described and claimed.

公开(公告)号：US20210116415A1

公开(公告)日：2021-04-22

申请号：US17253474

申请日：2019-07-24

Applicant: HACH COMPANY

Inventor： Vishnu Rajasekharan ,  Russell Young ,  Richard Leggett ,  Seamus O'Mahony

IPC: G01N27/416 ,  G01N31/00 ,  G01N33/18 ,  G01N27/30 ,  G01N31/22 ,  G01N21/80

Abstract: An embodiment provides a method for measuring at least one characteristic of an aqueous sample, including: introducing an aqueous sample into a measurement device comprising one or more electrodes; oxidizing a transition metal to produce a higher valent metal by applying an electrical potential between an anode and a cathode of the measurement device; oxidizing, using the higher valent metal as a catalyst, a material within the aqueous sample; measuring a characteristic of the aqueous sample based upon the oxidized material, using a measurement device selected from the group consisting of: an electrochemical measurement device and an optical measurement device; and optimizing the electrical potential and at least one reagent delivered to the measurement device based on the measurement of the characteristic. Other aspects are described and claimed.

公开(公告)号：US10724984B2

公开(公告)日：2020-07-28

申请号：US15663732

申请日：2017-07-29

Applicant: Hach Company

Inventor： Seamus O'Mahony ,  Vishnu Vardhanan Rajasekharan

IPC: G01N27/416 ,  G01N27/30 ,  G01N33/18

Abstract: An embodiment provides a method for oxidizing organic carbon, including: introducing, in a reaction chamber of a total organic carbon analyzer, a fluid sample comprising organic carbon, wherein the reaction chamber includes an electrochemical cell and wherein the electrochemical cell comprises an SP3 substituted solid carbon electrode doped with a conductivity elevating composition; applying, using a generator, a positive potential to the SP3 substituted carbon electrode, the positive potential being sufficient to oxidize organics in the fluid sample to produce carbonate and partially oxidized organics; introducing, in the reaction chamber, at least one acid reagent comprising a metallic catalyst, prior to or substantially simultaneously during the application of the positive potential to the SP3 substituted carbon electrode, that converts the carbonate and the partially oxidized species to carbon dioxide; and detecting, using at least one detector, the carbon dioxide produced by the oxidation. Other aspects are described and claimed.

公开(公告)号：US20190033249A1

公开(公告)日：2019-01-31

申请号：US15663732

申请日：2017-07-29

Applicant: Hach Company

Inventor： Seamus O'Mahony ,  Vishnu Vardhanan Rajasekharan

IPC: G01N27/416 ,  G01N27/30

Abstract: An embodiment provides a method for oxidizing organic carbon, including: introducing, in a reaction chamber of a total organic carbon analyzer, a fluid sample comprising organic carbon, wherein the reaction chamber includes an electrochemical cell and wherein the electrochemical cell comprises an SP3 substituted solid carbon electrode doped with a conductivity elevating composition; applying, using a generator, a positive potential to the SP3 substituted carbon electrode, the positive potential being sufficient to oxidize organics in the fluid sample to produce carbonate and partially oxidized organics; introducing, in the reaction chamber, at least one acid reagent comprising a metallic catalyst, prior to or substantially simultaneously during the application of the positive potential to the SP3 substituted carbon electrode, that converts the carbonate and the partially oxidized species to carbon dioxide; and detecting, using at least one detector, the carbon dioxide produced by the oxidation. Other aspects are described and claimed.

公开(公告)号：US20210018460A1

公开(公告)日：2021-01-21

申请号：US16931943

申请日：2020-07-17

Applicant: Hach Company

Inventor： Seamus O'Mahony

IPC: G01N27/30 ,  G01N27/416

Abstract: One embodiment provides a method for oxidizing a component in a fluid sample, including: introducing, in a reaction chamber of a total analyte analyzer, a fluid sample comprising a component, wherein the reaction chamber includes an electrochemical cell and wherein the electrochemical cell comprises at least one SP3 substituted solid carbon electrode doped with a conductivity elevating composition; applying, using a generator, a potential to the at least one SP3 substituted solid carbon electrode, the potential being sufficient to oxidize the component in the fluid sample to produce carbonate and partially oxidized organics; introducing, in the reaction chamber, a base and thereafter an acid to oxidize the total analyte; and detecting, using at least one detector, the total analyte produced by the oxidation. Other embodiments are described and claimed.