Matches 1 - 50 out of 271 1 2 3 4 5 6 >


Match Document Document Title
8182768 Interface assembly for pre-concentrating analytes in chromatography  
A system for interfacing a sampling device and a chromatograph and for pre-concentrating analytes in a sample prior to introducing the sample into the chromatographic column is generally disclosed...
8176770 Sniffer leak detector  
A sniffing leak detector which comprises a mass spectrometer, a turbomolecular pump and a forevacuum pump. In case that the sniffing hose with the hand-operated sniffing probe becomes detached from...
8171773 Sniffing leak detector  
To achieve a large measurement range from small up to larger leakage rates, a switchover from normal operation to gross operation occurs. In gross operation, the sucked-in gas flow is separated by...
8167987 Methods and systems for cooling a chromatographic column  
Systems and methods for cooling a chromatographic column is disclosed generally, comprising heating a chromatographic column, supplying fluid into the column via the inlet end of the column at an...
8152909 Gas chromatography check valve and system  
An apparatus, system, and method are disclosed for a gas chromatography (GC) system with a check valve. The check valve is situated downstream from the electronic flow control module and upstream...
8141411 Method for determining a low cylinder pressure condition for a gas chromatograph  
A method for determining a low cylinder pressure condition of a gas chromatograph includes providing gas from the cylinder to an inlet of the gas chromatograph. In particular, the gas is provided...
8137437 Vapour generators  
A vapor generator system (1, 101) for an IMS (4, 104) or other apparatus has a chamber (9, 109) in which vapor is produced. A fan or other flow generator (6, 106) is connected to an inlet (8, 108)...
8132443 Microfabricated gas chromatograph  
The present invention is generally directed to a microfabricated gas chromatograph column having two patterned substrates, each optionally having a stationary phase material coating, bonded...
8123841 Column design for micro gas chromatograph  
Improved micro-columns and methods for producing micro-columns particularly suitable for use in gas chromatographs are disclosed. In particular, following deposition of the stationary phase...
8104326 Methods and devices for circulating air  
A gas chromatography system comprising a sample introduction device, an oven coupled to the sample introduction device and a detector coupled to the oven is disclosed. In certain examples, the oven...
8099995 Choked flow isolator for noise reduction in analytical systems  
An apparatus and a method of making a measurement using the same. The apparatus includes a channel through which a fluid flows, a detector, and a choked flow channel. The detector measures a...
8092744 Analytical chemical sampling system with bypass mode  
A purge and trap concentrator system that includes a sparge vessel, and includes a variable gas flow valve for controlling the gas pressure in an analytic trap or the sparge vessel; a sensor that...
8062905 Purge and trap concentrator with sparge vessel  
A purge and trap concentrator system that includes a sparge vessel, and includes a variable gas flow valve for controlling the gas pressure in an analytic trap or the sparge vessel; a sensor that...
8043565 Analytical instrumentation and processes  
Gas chromatography apparatuses are provided that can include a housing configured to substantially envelop the column within the compartment. Analytical instruments are provided that can include at...
8015856 Gas chromatograph with improved thermal maintenance and process operation using microprocessor control  
A gas chromatograph controlled by a pair of microprocessors to have improved thermal maintenance and process operation. The microprocessors are operable to run independently of each other, with one...
8011224 Method and device for detecting and identifying chemical agents  
A feeding device for enriching and feeding a fluid sample into a chemical detector, the feeding device comprises (a) a sorbent element having a sorbent material for sorbing at least one target...
7997300 Aerosol inlet flow modulator  
A flow modulator to control the flow of an aerosol to an aerosol detection and/or monitoring system and other aerosol flow systems includes a chamber having an inlet and an outlet, a diverging...
7992423 Feed-through module for an analyzer  
A feed-through module for an analyzer, such as a gas chromatograph. The feed-through module is adapted for connection to a plurality of tubes and for conveying fluids between the tubes and an...
7959865 Miniaturized gas chromatograph and injector for the same  
The invention relates to a miniaturized gas chromatograph and injector for the same. Said micro-GC is compact and simple and economical to construct. Dead volumes are largely avoided in order to...
7951609 Purge and trap concentrator with sparge vessel  
A purge and trap concentrator system that includes a sparge vessel, and includes a variable gas flow valve for controlling the gas pressure in an analytic trap or the sparge vessel; a sensor that...
7914612 Compliant column sheath assembly for gas chromatography  
A compliant column sheath assembly for use in a gas chromatograph is provided which includes an open tubular column in the form of a helical coil having a coiled length of between about 5 and 15...
7867325 Gas chromatographic device  
A gas chromatographic device comprises an inlet system and a chromatography column. The inlet system includes a liner having pressure reducing means contained therein for reducing pressure between...
7845210 Fluid control device for a gas chromatograph  
A flow control device for a gas chromatograph is provided. The flow control device includes first and second valves each having alpha and beta operating states and a plurality of ports. In each of...
7836750 Gas detection system and method  
An example of a gas detection system includes a gas chromatograph oven, a gas detector, a sample gas moving device, and a flow detector. An example of a method for detecting gas includes flowing a...
7832253 Portable weather resistant gas chromatograph system  
A portable weather resistant gas chromatograph system with a gas chromatograph enclosure having a body and a movable door and a seal, a gas chromatograph with a frame assembly removably secured in...
7824478 Methods and systems for characterizing a sorbent tube  
Disclosed are systems and methods that include providing a vessel having an inlet and an outlet for communicating a carrier gas through the vessel; determining a differential pressure between the...
7824471 Chromatographic systems and methods for eliminating interference from interfering agents  
The present invention provides a chromatographic method for eliminating interference from interfering agents, coming from the gas sample itself or from the system material used to perform the...
7823439 Method for identifying the composition of a sample  
The present invention is directed to a method for multidimensional gas chromatography for separating the analytes of a complex sample. The method comprises the steps of introducing the sample onto...
7803635 Purge and trap concentrator with sparge vessel  
A purge and trap concentrator system that includes a sparge vessel, and includes a variable gas flow valve for controlling the gas pressure in an analytic trap or the sparge vessel; a sensor that...
7779670 Two valve switching modulator for comprehensive two-dimensional gas chromatography  
The present invention is an improvement to two-dimensional comprehensive gas chromatography. The improvement is a two-valve switching modulator connecting two gas chromatography separation columns....
7743641 Compact field-mountable gas chromatograph with a display screen  
The present invention is directed to a gas chromatograph having a display screen. The gas chromatograph includes an explosion-proof housing and a transparent panel secured to the housing. The...
7735352 Multi-dimensional portable gas chromatograph system  
A portable multi-dimensional gas chromatograph, the gas chromatograph including a carrier gas container, a regulator fluidly connected to the carrier gas container, a dopant chamber containing a...
7709267 System and method for extracting headspace vapor  
A system and method for extracting headspace vapor is generally disclosed comprising pressurizing a vessel containing headspace vapor with a carrier gas and subsequently venting the sample mixture...
7654130 Gas chromatography system architecture incorporating integrated thermal management  
A self-contained micro-scale gas chromatography system that includes a plurality of gas chromatography components arranged on a micro-fluidic platform with nearly zero dead volume “tubeless” flu...
7600413 Gas chromatography system architecture  
A self-contained micro-scale gas chromatography system that includes a plurality of gas chromatography components arranged on a micro-fluidic platform with nearly zero dead volume “tubeless” flu...
7601543 Method of modulating a second carrier for partial modulation via pulsed flow modulator for comprehensive two-dimensional liquid or gas chromatography  
This invention is a method and device for use with multi-dimensional chromatography that utilizes partial modulation. An analyte-bearing sample is subjected to a first dimension of chromatography....
7559227 Pneumatic testing for gas chromatograph inlet  
A method and apparatus for detecting a flow disruption within a gas chromatograph (GC) inlet. A controller controls an input flow of a gas entering a chamber of the GC inlet, and the output flow of...
7552618 Chromatographic interface for thermal desorption systems  
Disclosed are systems and methods that include a thermal desorption unit, a chromatographic column, and an interface device between the unit and the column. The interface device controls the fluid...
7552617 Automated system for detection of chemical compounds  
An automated system for processing a liquid test sample is provided. The disclosed automated system comprises a gas and liquid separator; an attachment for a first gas source that provides a flow...
7534286 Methods and systems for cooling a chromatographic column  
Systems and methods for cooling a chromatographic column is disclosed generally, comprising heating a chromatographic column, supplying fluid into the column via the inlet end of the column at an...
7530257 Phased micro analyzer VIII  
A micro fluid analyzer that may be highly sensitive, fast and very compact. The analyzer may use sufficiently low power per analysis to be easily implemented with an equivalently small battery pack...
7524363 Gas chromatograph column assembly  
A separation column assembly for a gas chromatograph and the like is provided. The assembly is a self contained unit which allows very rapid heating and cooling of the column.
7507586 Partial modulation via pulsed flow modulator for comprehensive two-dimensional liquid or gas chromatography with multiple modulation periods  
This invention is a method and device for use with multi-dimensional chromatography that utilizes partial modulation with multiple secondary retention times. An analyte-bearing sample is subjected...
7503203 Rotary valve and analytical chromatographic system using the same  
There is provided a rotary valve for fluid analytical systems. The present valve provides improved characteristics such as an extended lifetime. The valve can fulfil different fluid analytical...
7485176 Compact thermal conductivity detector  
A thermal conductivity detector comprises a housing having an internal cavity, a fluid inlet, a fluid outlet, a first bore and a second bore. The thermal conductivity detector further comprises a...
7468095 System for controlling flow into chromatographic column using transfer line impedance  
A system for controlling the flow rate into a chromatographic column is disclosed generally comprising communicating a fluid to the column through a transfer line, measuring the transfer line inlet...
7451634 Chromatographic methods for measuring impurities in a gas sample  
An improved chromatographic method for measuring impurities in a gas sample that allows extraction of a peak of impurity masked by the sample background. An impurity peak is extracted from the...
7437906 Flow regulator device for an analytical circuit and its use in chromatography  
A flow regulator device for an analytical circuit, characterised by comprising: a fluid restriction (R) of defined characteristics related to the field of application of the analytical circuit, a...
7422625 Methods and systems for characterizing a sorbent tube  
Disclosed are systems and methods that include providing a vessel having an inlet and an outlet for communicating a carrier gas through the vessel; determining a differential pressure between the...
7396386 Method and apparatus for keeping constant the retention times in a gaschromatographic analysis  
A method for obtaining reproducibility of the retention times of the components of a mixture to be analysed in an apparatus for gaschromatographic analysis provided with a capillary column, when...
Matches 1 - 50 out of 271 1 2 3 4 5 6 >