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| Number | Title | Issue Date |
| 8182581 | High stability diionic liquid salts The present invention relates to diionic liquid salts of dicationic or dianionic molecules, as well as solvents comprising diionic liquids and the use of diionic liquids as the stationary phase in a gas chromatographic column. ... | 05/22/2012 |
| 7314505 | Stationary phase deposition based on onium salts Onium salt chemistry can be used to deposit very uniform thickness stationary phases on the wall of a gas chromatography column. In particular, the stationary phase can be bonded to non-silicon based columns, especially microfabricated metal columns. Non-silicon mic... | 01/01/2008 |
| 6955709 | Method and device for vaporization injection of high volumes in gas chromatographic analysis This invention concerns a method and apparatus for vaporization injection of large volumes of liquid sample (substance to be analysed+solvent) introduced by a syringe needle into a heated vaporization chamber which is part of an injector coupled operatively to a dev... | 10/18/2005 |
| 6929780 | Vaporizer tube for vaporizing liquid samples in capillary gas chromatography The invention relates to a vaporizer tube for vaporizing liquid samples in capillary gas chromatography. The vaporizer tube is open throughout its whole length. It has throats which are shaped to provide, in their region, a heavy increase of the flow velocity of the... | 08/16/2005 |
| 5892458 | Apparatus for recognition of exchangeable parts in analytical measuring instruments An apparatus for the recognition of exchangeable parts in an analytical measuring instrument or in an analytical measurement system with several analytical devices, which contain exchangeable parts has identification modules each attached to an exchangeab... | 04/06/1999 |
| 5779765 | Process and device for the injection of large volumes of liquid samples in a gaschromatograph To inject a liquid sample with large volume into a GC column of a gas chromatograph, its volatile portion is evaporated by heat, in a non-selective way, in a vaporization chamber, the vapors thus generated being fed to pre-column located upstream of the G... | 07/14/1998 |
| 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 |
| 5135549 | Chromatographic technique and apparatus To provide a compact, sensitive comprehensive, two-dimensional gas chromatograph, a chromatographic column has first and second sections in series with each other to permit the flow of sample and a carrier through the first section and the second section.... | 08/04/1992 |
| 4957620 | Liquid chromatography using microporous hollow fibers Liquid chromatography separations of solutes are achieved using porous hollow fibers. The pores of the hollow fibers immobilize a solute-absorbing phase (preferably organic) which has a greater absorbance affinity towards at least one solute in a mixture ... | 09/18/1990 |
| 4588422 | Process and equipment for sampling a gaseous effluent and their application to chromatography The present invention concerns a process and equipment for drawing off a sample for a chromatographic analysis installation. In addition to the chromatographic analysis apparatus 22 per se and a set of rotary pneumatic valves to which it is normally assoc... | 05/13/1986 |
| 4559063 | Multi purpose on column injection The invention relates to a direct on column non-vaporizing injector for gas chromatographic analyses and comprising an accessory device capable of allowing injection with sample vaporization and possible splitting. The accessory device is formed by a tubu... | 12/17/1985 |
| 4383839 | Method and device for vaporization injection of a liquid sample for gas chromatographic analysis This invention relates to a method and a device for vaporization injection of a liquid sample in a gas chromatographic column housed in an oven comprising a direct on column injector suitable for injecting a liquid sample into the initial zone of a capill... | 05/17/1983 |
| 4376641 | Coated capillary chromatographic column In the production of a wall coated open tubular capillary chromatographic column, improved deactivation of the inner surface of a glass or fused silica capillary tube prior to coating with stationary phase is obtained by a multi-step process whereby silox... | 03/15/1983 |
| 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 |
| 4124358 | Sample-injection device for process gas chromatography with capillary columns A sample injection device for gas chromatography with a heated evaporation chamber and an adjoining split chamber for splitting the flow, in which carrier gas is introduced into the evaporation chamber and into the split chamber through respective valves.... | 11/07/1978 |
