Aqueous sample measurement via oxidizing metal to higher valence

Patent metadata

Field	Value
Publication number	US-12013368-B2
Application number	US-201917253474-A
Country	US
Kind code	B2
Filing date	Jul 24, 2019
Priority date	Jul 24, 2018
Publication date	Jun 18, 2024
Grant date	Jun 18, 2024

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.

First claim

What is claimed is:

1. A method for measuring at least one characteristic of an aqueous sample, comprising:
introducing an aqueous sample with a transition metal into a measurement device comprising one or more electrodes, wherein the measurement device comprises a membrane disposed between an anode and a cathode, and wherein the position of the membrane can be adjusted between the anode and the cathode;
oxidizing a transition metal to produce a higher valent metal by applying an electrical potential between the anode and the 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.

2. The method of claim 1 , wherein the higher valent metal comprises a metal having a measurable color.

3. The method of claim 2 , wherein the oxidizing a material within the aqueous sample causes a measurable colorimetric change in the color of the higher valent metal.

4. The method of claim 3 , wherein the measuring a characteristic of the aqueous sample comprises measuring the colorimetric change.

5. The method of claim 1 , wherein a distance between the anode and the cathode is adjustable.

6. The method of claim 1 , wherein at least one of the anode or the cathode comprises a SP3 substituted solid carbon electrode material.

7. The method of claim 1 , wherein the measuring a characteristic comprises measuring total organic carbon.

8. The method of claim 1 , wherein the oxidizing a material comprises using ultraviolet perturbation.

9. The method of claim 1 , wherein the measuring comprises using at least one of: a colorimetric detection and a pH determination.

10. A measurement device for measuring at least one characteristic of an aqueous sample, comprising:
at least one chamber;
one or more series of electrodes at least partially disposed within one of the at least one chamber;
a processor; and
a memory device that stores instructions executable by the processor to:
introduce an aqueous sample with a transition metal into a measurement device comprising one or more electrodes, wherein the measurement device comprises a membrane disposed between an anode and a cathode, and wherein the position of the membrane can be adjusted between the anode and the cathode;
oxidize a transition metal to produce a higher valent metal by applying an electrical potential between the anode and the cathode of the measurement device;
oxidize, using the higher valent metal as a catalyst, a material within the aqueous sample;
measure 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.

11. The measurement device of claim 10 , wherein the higher valent metal comprises a metal having a measurable color.

12. The measurement device of claim 11 , wherein the oxidizing a material within the aqueous sample causes a measurable colorimetric change in the color of the higher valent metal.

13. The measurement device of claim 12 , wherein the measuring a characteristic of the aqueous sample comprises measuring the colorimetric change.

14. The measurement device of claim 10 , wherein a distance between the anode and the cathode is adjustable.

15. The measurement device of claim 10 , wherein at least one of the anode or the cathode comprises a SP3 substituted solid carbon electrode material.

16. The measurement device of claim 10 , wherein the measuring a characteristic comprises measuring at least one of: total organic carbon, absorbance wavelength, and pH.

17. The measurement device of claim 10 , wherein the oxidizing a material comprises using ultraviolet perturbation.

Assignees

• Hach Co

Inventors

• Rajasekharan Vishnu
• Young Russell
• Leggett Richard
• O'Mahony Seamus

Classifications

• G01N33/1846

  Total carbon analysis · CPC title

• G01N31/221

  for investigating pH value · CPC title

• G01N31/005 Primary

  investigating the presence of an element by oxidation (G01N31/12 takes precedence) · CPC title

• G01N27/302

  pH sensitive, e.g. quinhydron, antimony or hydrogen electrodes (ion selective electrodes G01N27/333, glass electrodes G01N27/36) · CPC title

• G01N21/80

  Indicating pH value · CPC title