Patent US3954413A successfully refreshed from Google Patents.
US3954413A
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US
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Method of detection of chromatographic peaks
Assignee: Individual
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Filing: 1974-11-29
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Granted: 1976-05-04
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Expires: 1994-11-29
Abstract
Abstract A method of detection of chromatographic peaks in gas-liquid or gas-solid chromatography, comprising the ionization of the organic or metallo-organic compounds separated in a chromatographic column and removed in the form of fractions out of the column by an inert gaseous carrier. The ionization of the above compounds is effected by way of burning them in the flame of formic acid vapours. Simultaneously with the ionization, chromatographic peaks are recorded by means of the electrometric method based on measurement of the increase in the degree of the ionization of the flame as the above organic or metallo-organic compounds are being introduced thereinto.
Inventors
- 👤 Viktor Fedorovich Kucherov
- 👤 Boris Antonovich Rudenko
- 👤 Margarita Alexandrovna Baidarovtseva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:08
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/62; G01N30/64; G01N30/68
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
A method of detection of chromatographic peaks in gas-liquid or gas-solid chromatography, consisting in the ionization of compounds selected from the group consisting of organic and metallo-organic compounds, said compounds being cut prior to the ionization in a chromatographic column and removed, in the form of fractions, from said column by an inert gaseous carrier, the ionization of said compounds being effected by way of burning them in the flame of formic acid vapours and accompanied by recording of chromatographic peaks by an electrometric method based on measurement of the increase in the degree of the ionization of the flame as said compounds are being introduced thereinto.
Claim 2
Independent Claim
107 words
A method of detection of chromatographic peaks in gas-liquid or gas-solid chromatography, consisting in the ionization of compounds selected from the group consisting of organic and metallo-organic compounds, said compounds being cut prior to the ionization in a chromatographic column and removed, in the form of fractions, from said column by an inert gaseous carrier, the ionization of said compounds being effected by way of burning them in the flame of formic acid vapours and accompanied by recording of chromatographic peaks by an electrometric method based on measurement of the increase in the degree of the ionization of the flame as said compounds are being introduced thereinto.
Claim 3
Dependent Claim
21 words
A method as claimed in claim 1, wherein said inert carrier gases are nitrogen, helium, argon, carbon dioxide or sulphur dioxide.
Claim 4
Dependent Claim
24 words
A method as claimed in claim 1, wherein said inert carrier gases are vapours of water, formic acid, perchlorofluorocarbons, sulphur hexafluoride or carbon disulphide.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |