Abstract:
A gas chromatograph device includes an inductively heated column configured for gas chromatography. The gas chromatograph includes a column configured for gas chromatography and an inductive heating source. The inductive heating source is configured to directly or indirectly heat the column. The inductive heating source includes an inductive heating element or coil. The inductive heating element or coil is configured to induce a current directly or indirectly in the column. Wherein, the column in the gas chromatograph is inductively heated via the inductive heating source.
Abstract:
An apparatus for heating a GC column is described. The apparatus includes first and second temperature sensors. Temperature data are used to set power provided to a heating element of the apparatus.
Abstract:
Device, in particular a device for capillary chromatography. Also method for controlling the cooling of a component (8) of such a device. The device is provided with a cover (25, 25') which is arranged a short distance from a component (8) of the device and forms together with the device a space (26, 26') which space adjoins the component, wherein the geometry of the space, for instance the distance between the cover and the component, is chosen such that the space, the cover and the device together have the thermal properties required for a determined desired cooling characteristic of the component. Preferably the cover makes thermal contact, for instance by means of resilient contacts (28), with a heat sink, for instance a metal plate (27). The space can be filled with a fluid, for instance a gas, for instance air. The desired or required thermal properties can be chosen or variably regulated by selecting or adjusting the geometry of the space and/or selecting the type of fluid and/or selecting or regulating the mass density of the fluid. The cooling characteristic of the component can thus be controlled very precisely.
Abstract:
The invention relates to a device and to a method for determining the proportion of fuel in a combustion engine lubricating oil. The device according to the invention comprises a column (12) with at least 22000 theoretical plates and a steady state phase capable of separating the fuel, the oil, the internal standard contained in the oil and the solvent, in which the oil and the internal standard are diluted, and a heating module (120) capable of causing an increase in the temperature of the column (12) at a rate of at least 350°C/min. In the method according to the invention, the column (12) is subjected to determined cycles during which the pressure of the carrier gas and the temperature are varied.
Abstract:
A solid state, radiant energy power generator and control system for heating an object in a radiant energy cavity a radiant energy heated oven is disclosed, where the system includes a digital processing unit (DPU), an DPU interface, a device controller, a frequency regulator, a voltage control oscillator, a power regulator, an amplifier, and a reverse/forward power sensing means.
Abstract:
Eine Anordnung (10) zur Bestimmung von Stoff eigenschaften und/oder Stoffkonzentrationen von Komponenten einer Probe enthaltend eine chromatographische Trennsäule (20) mit einem flüssigen Laufmittel, Mittel zum Steuern der Temperatur innerhalb der Trennsäule in einem Bereich zwischen Raumtemperatur und 250°C, Mittel zum Erzeugen eines gegenüber Umgebungsdruck erhöhten Druckniveaus innerhalb der Trennsäule, und einen Detektor (14) mit einem Probenraum, in welchen die Komponenten der Probe einbringbar sind, ist dadurch gekennzeichnet, daß das Lauf mittel überwiegend Wasser enthält, Mittel zum Entspannen des Lauf mittels von dem erhöhten Druckniveau innerhalb der Trennsäule auf ümgebungsdruck und Erzeugung eines Phasenwechsel des Laufmittels von der flüssigen zur gasförmigen Phase vorgesehen sind, und Mittel (16) zum Überführen des die Komponenten der Probe enthaltenen, gasförmigen Lauf mittels in den Probenraum des Detektors (14) vorgesehen sind.
Abstract:
An apparatus for liquid chromatography comprises a liquid chromatography separation column on a substrate, wherein the separation column is coupled to a heater on the substrate. A chip-based temperature controlled liquid chromatography device comprises a substrate, a thermal isolation zone, and a separation column thermally isolated from the substrate by the thermal isolation zone. An apparatus for chip-based liquid chromatography comprising a cooling device is provided. A temperature gradient liquid chromatography system comprises a chip-based temperature controlled liquid chromatography device, a fluidic coupling, and an electrical interface. Methods of making and methods of using of chip-based temperature gradient liquid chromatography devices are also provided.
Abstract:
The present invention relates to a column for performing analytical temperature rising elution fractionation (ATREF) characterized in that the packing of said column comprises elastic wires having a good elasticity and a good thermal conductivity. The present invention also relates to a device comprising the column according to the invention, a temperature controlling system for controlling the temperature of said column, a sample injector for injecting a polymer sample solution into said column, a pump for eluting the polymer fractions from said column and a detector for detecting eluting fractions of said sample solution. The present invention further relates to a method for performing ATREF analyses using the column according to the invention.