US4196056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion selective electrode analysis
Assignee: Bayer Corp
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Filing: 1978-10-30
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Granted: 1980-04-01
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Expires: 1998-10-30
Abstract
Abstract A method and reagents are disclosed for minimizing interference from halide ions in ion-selective electrode analysis. A reagent consisting of a mixture of a metal and a chelating agent is introduced to the fluid sample being analyzed. This reagent forms soluble complexes with halide ions in the fluid sample, thus minimizing their effects.
Inventors
- 👤 Anand Kumar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:45
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
62 words
A method of minimizing the effects of halide interferants in the analysis of an analyte in a fluid sample by an ion-selective electrode, comprising the steps of: (a) introducing a reagent into said fluid sample to form soluble complexes with said halide interferants in said fluid sample; and (b) analyzing said fluid sample for said analyte by means of said ion-selective electrode.
Claim 2
Independent Claim
62 words
A method of minimizing the effects of halide interferants in the analysis of an analyte in a fluid sample by an ion-selective electrode, comprising the steps of: (a) introducing a reagent into said fluid sample to form soluble complexes with said halide interferants in said fluid sample; and (b) analyzing said fluid sample for said analyte by means of said ion-selective electrode.
Claim 3
Dependent Claim
37 words
The method of claim 1, wherein said reagent comprises a mixture of a metal and a chelating agent, and further wherein said metal is selected from a group consisting of: mercury, silver, lead, bismuth, copper and cadmium.
Claim 4
Dependent Claim
45 words
The method of claim 1, wherein said reagent comprises a mixture of a metal and a chelating agent, and further wherein said chelating agent is selected from a group consisting of: ethylenediamine, n-butylamine, triethylenetetramine, ethylenediaminetetraacetic acid, cyclohexanediaminetetraacetic acid, ethyleneglycol-bis-(2-aminoethyl ether) tetraacetic acid and nitrilotriacetic acid.
Claim 5
Dependent Claim
25 words
The method of claim 1, wherein the analysis of said fluid sample is for chloride ion, and the halide interferants are bromide and iodide ions.
Claim 6
Dependent Claim
73 words
A reagent for use in combination with an ion-selective electrode for minimizing the effects of halide interferants in an analysis of a fluid sample by said ion-selective electrode, said reagent consisting of: a mixture comprising a metal and a chelating agent, said metal and chelating agent forming soluble complexes with said halide interferants in said fluid sample, whereby the effects of said halide interferants upon the analysis of said ion-selective electrode is minimized.
Claim 7
Dependent Claim
73 words
A reagent for use in combination with an ion-selective electrode for minimizing the effects of halide interferants in an analysis of a fluid sample by said ion-selective electrode, said reagent consisting of: a mixture comprising a metal and a chelating agent, said metal and chelating agent forming soluble complexes with said halide interferants in said fluid sample, whereby the effects of said halide interferants upon the analysis of said ion-selective electrode is minimized.
Claim 8
Dependent Claim
25 words
The reagent of the combination of claim 5, wherein said metal is selected from a group consisting of: mercury, silver, lead, bismuth, copper and cadmium.
Claim 9
Dependent Claim
33 words
The reagent of the combination of claim 5, wherein said chelating agent is selected from a group consisting of: ethylenediamine, n-butylamine, triethylenetetramine, ethylenediaminetetraacetic acid, cyclohexanediaminetetraacetic acid, ethyleneglycol-bis-(2-aminoethyl ether) tetraacetic acid, and nitrilotriacetic acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |