GB915305A - Process for separating the components of mixtures - Google Patents
Process for separating the components of mixturesInfo
- Publication number
- GB915305A GB915305A GB881959A GB881959A GB915305A GB 915305 A GB915305 A GB 915305A GB 881959 A GB881959 A GB 881959A GB 881959 A GB881959 A GB 881959A GB 915305 A GB915305 A GB 915305A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- furnace
- mixture
- components
- temperatures
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/14—Investigating or analyzing materials by the use of thermal means by using distillation, extraction, sublimation, condensation, freezing, or crystallisation
Abstract
A process for separating the components of mixtures by fractional sublimation comprises placing a mixture in a sealed end of a tube which is supported in a furnace with said end uppermost and applying a reduced pressure to the interior of said tube whereby sublimable materials are volatilized and form as separate zones in the lower portions of said tube; the furnace having a temperature gradient which decreases from the vicinity of the sealed end of the tube toward the lower portion of said tube, and each part of said tube being maintained at a substantially constant temperature within said furnace. The term "mixture" also embraces substances which are decomposable to give sublimable products. Apparatus for performing the process is substantially the same as that disclosed in Specification 915,306, to which reference is made. The location and nature of the zones resulting from the process are characteristic of the mixture separated and may therefore be used in analysis or in the case of urine, blood and other body fluids, for diagnosis of disease. The sample may be held in the testing tube by means of a spring, and liquid samples may be first incorporated into an absorbent, e.g. diatomaceous earth. Examples of suitable temperatures which may be used for the separation of (a) urine components, (b) copper and zinc acetylacetonate and (c) caffeine in a sample of tea are provided, together with the characteristic deposition (condensation) temperature under specified conditions for cholesterol, phthalic anhydride, naphthalene, caffeine and urea. Specified temperature gradients range from upper temperatures of 70 DEG -350 DEG C. to lower temperatures of 37 DEG -70 DEG C.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP839258 | 1958-03-29 | ||
| JP3309858 | 1958-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB915305A true GB915305A (en) | 1963-01-09 |
Family
ID=26342906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB881959A Expired GB915305A (en) | 1958-03-29 | 1959-03-13 | Process for separating the components of mixtures |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB915305A (en) |
-
1959
- 1959-03-13 GB GB881959A patent/GB915305A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3814079A (en) | Liquid collecting and filtering device | |
| US3481712A (en) | Sediment container and cap and analysis technique | |
| US3720760A (en) | Method for determining the presence of reagin-immunoglobulins(reagin-ig)directed against certain allergens,in aqueous samples | |
| AU2018253512B2 (en) | Rapid energized dispersive solid phase extraction (spe) for analytical analysis | |
| GB1376472A (en) | Specimen analysis device | |
| US2643940A (en) | Extractor for removing soluble constituents in chemical analysis | |
| GB915305A (en) | Process for separating the components of mixtures | |
| Tiwari et al. | Thin Layer Chromatography (TLC) VS. Paper Chromatography: A Review | |
| Bryce et al. | Determination of oxpentifylline and a metabolite, 1-(5′-hydroxyhexyl)-3, 7-dimethylxanthine, by gas—liquid chromatography using a nitrogen-selective detector | |
| US4138214A (en) | Diagnostic test utilizing human chorionic gonadotropin | |
| Howlett et al. | The collection of fractions separated by gas-liquid chromatography | |
| US11543334B2 (en) | Isolation and analysis of terpenes | |
| Ribi et al. | Chromatography of microbial lipids by centrifugation through microparticulate gel | |
| US3540852A (en) | Effluent sampling method and apparatus for a gas chromatographic procedure | |
| Hallett | Review of Organic Microchemistry | |
| Vandenheuval | Rapid, accurate microanalysis of the lower fatty acids with particular reference to serial determination. | |
| Neal et al. | Low temperature separation of trace amounts of dimethylpolysiloxanes from food | |
| Davis et al. | Liquid sample inlet system for gas chromatographs | |
| Shearer et al. | Collection of gas-chromatographic fractions for identification by infrared spectrophotometry | |
| Fiala | A study of the neutralization of rhinoviruses by means of a plaque-reduction test | |
| Ehrenberg et al. | Radiation-induced free radicals in embryo and endosperm of barley kernels | |
| Ikan et al. | Test tube and glass rod tlc | |
| Jackson | Method for differential staining of mycorrhizal roots | |
| Mayer et al. | Ammonia Determination and Sample Preparation for Mass Spectrometer by Micro Diffusion Method | |
| Schluter | Preparatory trapping of gas-chromatographic effluents with a fritted filter |