Patent US3715910A successfully refreshed from Google Patents.
US3715910A
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Determination of residual solvent in oilseed meals and flours by a volatilization procedure
Assignee: United States Department of Agriculture
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Filing: 1971-01-26
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Granted: 1973-02-13
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Expires: 1991-01-26
Abstract
Abstract This invention relates to a simple volatilization procedure for the determination of residual solvents in oilseed meals and flours. A sample of meal or flour and water are weighed into a serum bottle. The bottle is sealed and heated in an oven to volatilize the residual solvent. An aliquot of the headspace gas is then analyzed by gas chromatography.
Inventors
- 👤 S Fore
- 👤 E Rayner
- 👤 H Dupuy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:00
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N30/12; G01N7/00; G01N7/14; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25875
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
A process for determining the residual hexane content in aN oilseed meal or flour, comprising: a. heating a mixture of about from one to two parts of an oilseed meal or flour and about from 0.01 to 0.4 part of water in a closed container at a temperature of about from 70* to 110* C. for about from one to five hours to generate headspace gas; b. removing an aliquot of the headspace gas from the container, and determining the hexane content thereof chromatographically.
Claim 2
Dependent Claim
84 words
A process for determining the residual hexane content in aN oilseed meal or flour, comprising: a. heating a mixture of about from one to two parts of an oilseed meal or flour and about from 0.01 to 0.4 part of water in a closed container at a temperature of about from 70* to 110* C. for about from one to five hours to generate headspace gas; b. removing an aliquot of the headspace gas from the container, and determining the hexane content thereof chromatographically.
Claim 3
Dependent Claim
84 words
A process for determining the residual isopropanol content in an oilseed meal or flour, comprising: a. heating a mixture of about one part of an oilseed meal or flour, about from 0.1 to 0.2 part of water, and an effective amount of ethanol as an internal standard in a closed container at a temperature of about 110* C. for about 1 hour to generate headspace gas; b. removing an aliquot of the headspace gas from the container, and determining the isopropanol content thereof chromatographically.
Claim 4
Dependent Claim
84 words
A process for determining the residual isopropanol content in an oilseed meal or flour, comprising: a. heating a mixture of about one part of an oilseed meal or flour, about from 0.1 to 0.2 part of water, and an effective amount of ethanol as an internal standard in a closed container at a temperature of about 110* C. for about 1 hour to generate headspace gas; b. removing an aliquot of the headspace gas from the container, and determining the isopropanol content thereof chromatographically.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |