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| Number | Title | Issue Date |
| 6968729 | Method and apparatus for expediting analysis of samples The present invention comprises a method for expediting the analysis of a plurality of samples, preferably using gas chromatography. A specific embodiment comprises a dual isothermal heated zone configuration for use in combinatorial chemistry. This involves partiti... | 11/29/2005 |
| 6153808 | Method for separating alkylnaphthalene In a method for separating at least one alkylnaphthalene from a stock mixture containing at least two alkylnaphthalenes selected from the group consisting of monoalkylnaphthalenes and dialkylnaphthalenes, a column packed with an optically active chromatog... | 11/28/2000 |
| 5840953 | Purified tetraethoxysilane and method of purifying Tetraethoxysilane is purified by passing impure material through a gas chromatographic separating column at a temperature below the boiling point of the pure tetraethoxysilane. Separation of pure material from impurities occurs on the column, and the pure... | 11/24/1998 |
| 5154738 | Chiral separation media The media is an ether derivative of cyclodextrin such as a permethylated hydroxy ether of cyclodextrin or a dialkyl trifluoroacetyl ether derivative of cyclodextrin and is used in capillary gas chromatographic columns. Particular benefit is obtained using... | 10/13/1992 |
| 5057126 | Gas chromatography In gas chromatography wherein only the more volatile components of a multi-component sample are of interest, the sample is injected into a hot vaporization chamber containing a packing material. An inert carrier gas sweeps the resulting vaporized gases th... | 10/15/1991 |
| 4757023 | Method and equipment for the simulated distillation by means of gas chromatography with non vaporizing direct injection The invention concerns a method and an equipment for the simulated distillation, by means of gas chromatography, of petroleum products, capable of characterizing also high boiling products, exceeding C55, over 600 C TBP. A chromatograph is used with a cap... | 07/12/1988 |
| 4737292 | HPLC column and a column packing method This invention relates to a column for use in preparative HPLC so structured as to insure a reproducible packing bed uniformity regardless of the particle size of the medium used.... | 04/12/1988 |
| 4443231 | Continuous chromatographic separations in a magnetically stabilized fluidized bed A multicomponent feed mixture may be separated into its components continuously by injecting said feed mixture and a carrier fluid into a magnetically stabilized fluidized bed containing adsorbent particles admixed or composited with magnetizable particle... | 04/17/1984 |
| 4426452 | Volatile metal carbonyl analysis The presence of volatile metal carbonyls, e.g., nickel tetracarbonyl and iron pentacarbonyl, in fluid streams can be measured simultaneously by a gas chromatograph using squalane as the stationary liquid phase and a constant current, electron capture dete... | 01/17/1984 |
| 4392873 | Continuous vapor phase chromatography A method of continuously separating a mixture into its various components using vapor phase chromatography in which both the liquid/solid phase and the fluid (gas) phase are mobile.... | 07/12/1983 |
| 4140496 | S-Triazine derivatives An optically active s-triazine derivative having at least two asymmetric carbon atoms of the general formula: ##STR1## wherein n is 2 to 3; and X and Y are the same or different and are each a member selected from the group consisting of the groups: ... | 02/20/1979 |
| 4123931 | Method for uniformly coating liquid phases on glass beads and applications thereof A method is provided for uniformly coating a stationary liquid phase on glass beads, which are then suitable for use as chromatographic column packing, which comprises first contacting the beads with a first solution containing a suitable surfactant in an... | 11/07/1978 |
| 4063911 | High temperature polar stationary liquid phase for gas chromatography This invention is an improved stationary phase utilized in gas-liquid chromatography, having high thermal stability, producing low noise level in an electrical detecting apparatus, comprising of a silicone polymer with recurring units of the formula: ... | 12/20/1977 |
| 3988919 | Use of graphitized carbon beads for gas liquid chromatography Carbonized resin microspheroids are used as a column packing in gas-solid chromatography and as a support in gas-liquid chromatography.... | 11/02/1976 |
| 3960521 | High temperature polar stationary phase for gas chromatograhy This invention is an improved stationary phase utilized in gas-liquid chromatograhy, having high thermal stability, producing low noise level in an electrical detecting apparatus, comprising a silicone polymer with recurring units of the formula: ##E... | 06/01/1976 |
