US4361473A
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Potassium ion-selective membrane electrode
Assignee: BankBoston NA
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Filing: 1981-10-28
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Granted: 1982-11-30
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Expires: 2001-10-28
Abstract
Abstract In an electrode for determining the potassium ion content of a liquid sample to be tested, the electrode including a membrane having incorporated therein an ion selective component, the improvement in which the ion specific component is a compound of the formula: ##STR1## wherein each R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 is hydrogen or an alkyl group containing between one and about 20 carbon atoms, p is 0 or 1, n is one or more, and, each s and r, independently, is 1, 2, or 3, provided that, when p is 1, n is 8 or more.
Inventors
- 👤 Chung C. Young
- 👤 John P. Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:34
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
114 words
In an electrode for determining the potassium ion content of a liquid sample to be tested, said electrode comprising a membrane having incorporated therein an ion selective component, the improvement wherein said ion specific component comprises a compound of the formula: ##STR10## wherein each R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 is hydrogen or an alkyl group containing between one and about 20 carbon atoms, p is 0 or 1, n is one or more, and, each s and r, independently, is 1, 2, or 3, provided that, when p is 1, n is 8 or more.
Claim 2
Dependent Claim
114 words
In an electrode for determining the potassium ion content of a liquid sample to be tested, said electrode comprising a membrane having incorporated therein an ion selective component, the improvement wherein said ion specific component comprises a compound of the formula: ##STR10## wherein each R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 is hydrogen or an alkyl group containing between one and about 20 carbon atoms, p is 0 or 1, n is one or more, and, each s and r, independently, is 1, 2, or 3, provided that, when p is 1, n is 8 or more.
Claim 3
Dependent Claim
15 words
In the electrode of claim 1, said improvement wherein n is no greater than 14.
Claim 4
Dependent Claim
16 words
In the electrode of claim 2, said improvement wherein s is 2 and r is 2.
Claim 5
Dependent Claim
23 words
In the electrode of claim 3, said improvement wherein p is 1 and n is at least 8 and no greater than 14.
Claim 6
Dependent Claim
31 words
In the electrode of claim 4, said improvement wherein each R 1 -R 8 is hydrogen, each s and r is 2, and n is 8, 9, 10, 12, or 14.
Claim 7
Dependent Claim
16 words
In the electrode of claim 5, said improvement wherein said ion selective component is bis-(4-methylbenzo-15-crown-5) dodecanedioate.
Claim 8
Dependent Claim
12 words
In the electrode of claim 3, said improvement wherein p is 0.
Claim 9
Dependent Claim
24 words
In the electrode of claim 7, said improvement wherein said ion selective component has the formula: ##STR11## wherein n is 5, 10, or 12.
Claim 10
Dependent Claim
21 words
In the electrode of claim 1, said improvement wherein said membrane further comprises a plastic material and a non-volatile solvent plasticizer.
Claim 11
Dependent Claim
22 words
In the electrode of claim 9, said improvement wherein said plastic material is polyvinyl chloride and said solvent plasticizer is dibenzyl pimelate.
Claim 12
Dependent Claim
17 words
In the electrode of claim 10, said improvement wherein said membrane further comprises a salt of dipicrylamine.
Claim 13
Dependent Claim
16 words
In the electrode of claim 11, said improvement wherein said membrane further comprises an anion excluder.
Claim 14
Dependent Claim
18 words
In the electrode of claim 12, said improvement wherein said anion excluder is a salt of tetraphenyl borate.
Claim 15
Dependent Claim
91 words
In the electrode of claim 13, said improvement wherein said ion selective compound comprises between about 1% and 15% of said membrane, by weight; said plasticizer comprises between about 55% and 80% of said membrane by weight; said polyvinyl chloride comprises between about 10% and 30% of said membrane by weight; said tetraphenyl borate salt is present, in a mole ratio to said ion selective compound, of between 0.5:1 and 5:1; and said dipicrylamine salt is present, in a mole ratio to said ion selective compound, of between 0.1:1 and 0.3:1.
References Cited (Backward Citations)
US4233136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-29 | 1986-05-31 | 1986-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-29 | 1990-05-31 | 1990-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-29 | 1994-05-31 | 1994-11-30 | $7700.00 | Window Closed / Lapsed |