US3832060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing analyte material for spectrochemical analysis
Assignee: APPLIED RES LAB
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Filing: 1972-08-10
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Granted: 1974-08-27
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Expires: 1992-08-10
Abstract
Abstract An analyte material is prepared for spectrochemical analysis by depositing it in solution or electrostatically precipitating it upon a previously purged yarn of finely divided carbon fibers, dessicating it in situ, and electrically heating the yarn sufficiently to vaporize the analyte material while passing a gas stream over it in which the analyte material is condensed in particles of sufficiently small size to form an aerosol which is then conducted to any of a variety of excitation sources for spectrochemical analysis.
Inventors
- 👤 R Dahlquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:47
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/66; G01N21/67
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
110 words
A method of preparing analyte materials for spectrochemical analysis which comprises the steps of depositing analyte material in the solid state on the surfaces of the fibers of a yarn composed of fibers of high purity graphitic carbon a majority of which fibers are typically of diameters in the range of four to eight microns, heating said yarn to a temperature sufficient to vaporize said solid analyte material, condensing said vaporized material into solid particles of sufficiently small size to form an aerosol and transporting such particles for spectrochemical analysis to a location optically remote from said yarn by passing a stream of gas over said yarn during said heating.
Claim 2
Independent Claim
110 words
A method of preparing analyte materials for spectrochemical analysis which comprises the steps of depositing analyte material in the solid state on the surfaces of the fibers of a yarn composed of fibers of high purity graphitic carbon a majority of which fibers are typically of diameters in the range of four to eight microns, heating said yarn to a temperature sufficient to vaporize said solid analyte material, condensing said vaporized material into solid particles of sufficiently small size to form an aerosol and transporting such particles for spectrochemical analysis to a location optically remote from said yarn by passing a stream of gas over said yarn during said heating.
Claim 3
Dependent Claim
21 words
A method according to claim 1 in which the heating of said yarn is effected by passing an electrical current therethrough.
Claim 4
Dependent Claim
17 words
A method according to claim 1 in which the heating of said yarn is effected by induction.
Claim 5
Dependent Claim
36 words
A method according to claim 1 in which the steps described are performed in a continuous sequence while moving said yarn between and through separate zones in each of which one of said steps is performed.
Claim 6
Dependent Claim
49 words
A method according to claim 1 in which the deposition of analyte material on the surfaces of the fibers of said yarn is effected by imposing an electrical charge upon said yarn while exposing it to an atmosphere containing particles in the solid state of material to be analyzed.
Claim 7
Dependent Claim
21 words
A method according to claim 5 in which the heating of said yarn is effected by passing an electrical current therethrough.
Claim 8
Dependent Claim
17 words
A method according to claim 5 in which the heating of said yarn is effected by induction.
Claim 9
Dependent Claim
36 words
A method according to claim 5 in which the steps described are performed in a continuous sequence while moving said yarn between and through separate zones in each of which one of said steps is performed.
Claim 10
Dependent Claim
57 words
A method according to claim 1 in which said analyte material is first deposited on the surfaces of said fibers in solution in a solvent and which includes the additional step of heating said yarn only sufficiently to evaporate said solvent prior to heating said yarn to a higher temperature sufficient to Evolve the analyte material therefrom.
Claim 11
Dependent Claim
21 words
A method according to claim 9 in which the heating of the yarn is effected by passing an electrical current therethrough.
Claim 12
Dependent Claim
17 words
A method according to claim 9 in which the heating of the yarn is effected by induction.
Claim 13
Dependent Claim
36 words
A method according to claim 9 in which the steps described are performed in a continuous sequence while moving said yarn between and through separate zones in each of which one of said steps is performed.
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |