EP0305769B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Redox electrode for the determination of nitrous acid and nitrosyl compounds
Assignee: BASF SE
•
Filing: 1988-08-06
•
Granted: 1991-09-11
•
Expires: 2008-08-06
Abstract
Abstract Redox electrode for the determination of nitrous acid and nitrosyl compounds in aqueous acidic solution comprising a metallic conductor which has an n-type metal oxide surface.
Inventors
- 👤 Wolfgang Habermann
- 👤 Peter Dr. Hammes
- 👤 Reinhard Dr. Messlinger
- 👤 Manfred Munzinger
- 👤 Helmut Dr. Froehlich
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 10:49
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
44 words
A redox electrode for determining nitrous acid and nitrosyl compounds in aqueous, acidic solution, wherein the electrode core consists of a metallic conductor on which an n-conducting metal oxide surface having a conductivity κ of from 10⁻⁷ to 1 · 10² Ω⁻¹cm⁻¹1 is present.
Claim 2
Dependent Claim
44 words
A redox electrode for determining nitrous acid and nitrosyl compounds in aqueous, acidic solution, wherein the electrode core consists of a metallic conductor on which an n-conducting metal oxide surface having a conductivity κ of from 10⁻⁷ to 1 · 10² Ω⁻¹cm⁻¹1 is present.
Claim 3
Dependent Claim
28 words
A redox electrode as claimed in claim 1, wherein a metal of subgroups IV to VI of the Periodic Table of elements is used as the electrode core.
Claim 4
Dependent Claim
32 words
A redox electrode as claimed in claim 1 or 2, wherein the n-conducting metal oxide surface consists of an oxide or mixed oxide of the elements tungsten, molybdenum, vanadium, tantalum or titanium.
Claim 5
Dependent Claim
35 words
A redox electrode as claimed in claim 1 or 2 or 3, wherein the n-conducting metal oxide surface is produced by anodic oxidation of the electrode core in aqueous semiconcentrated sulfuric acid at room temperature.
Claim 6
Dependent Claim
25 words
A redox electrode as claimed in claim 1 or 2 or 3 or 4, wherein the anodically produced oxide layer is > 100 Å thick.
Claim 7
Dependent Claim
38 words
A redox electrode as claimed in claim 1 or 2 or 3 or 4 or 5, wherein the electrode core having the n-conducting metal oxide surface is used for the potentio-metric determination of nitrous acid and nitrosyl ions.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.