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| Number | Title | Issue Date |
| 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 different throttles, wherein the throttle that leads to the test gas ... | 05/08/2012 |
| 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 at a predetermined inlet pressure that is higher than an inlet pressur... | 03/27/2012 |
| 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 may be configured to receive a chromatography column in a space in t... | 01/31/2012 |
| 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 property of the fluid by generating a signal that depends on that property.... | 01/24/2012 |
| 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 the first and second valves, the ports are associated to have alpha p... | 12/07/2010 |
| 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 a first column whereby the sample is separated into at least two segm... | 11/02/2010 |
| 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. The modulator is located between the first and second columns and in... | 08/24/2010 |
| 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 display screen is disposed in the housing and is visible through the trans... | 06/29/2010 |
| 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” fluidic connections for the gas chromatography components. The micro-fl... | 02/02/2010 |
| 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” fluidic connections for the gas chromatography components. The micro-fl... | 10/13/2009 |
| 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 gas leaving the chamber. A flow disruption is detected when at least... | 07/14/2009 |
| 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 flowing into the column, such as by providing additional carrier gas ... | 06/30/2009 |
| 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 functions and can be a multi-ports and/or multi-positions valve. The valv... | 03/17/2009 |
| 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 sample background and put in a second sample loop and the second sample l... | 11/18/2008 |
| 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 direct-pressure regulator (2) positioned upstream of said restr... | 10/21/2008 |
| 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 inlet and the outlet for a known flow rate at the outlet; and, determi... | 09/09/2008 |
| 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 there occurs one of the following variations: variation in the length o... | 07/08/2008 |
| 7384453 | Self-contained chromatography system A self-contained chromatography system is provided and includes a chromatography column, a carrier gas reservoir containing a carrier gas and an analyte stream processing device, wherein the carrier gas reservoir is disposed upstream from the chromatography column a... | 06/10/2008 |
| 7377150 | Analyzer An analyzer includes a reforming unit which reforms fuel containing an organic compound which contains carbon and hydrogen into a reformed gas containing hydrogen, a flame ionization detector which is connected to the reforming unit, and detects an ion generated by ... | 05/27/2008 |
| 7367216 | Phased micro analyzer V, VI A micro fluid analyzer having a concentrator and two or more separators. The analyzer may have one, two or more pumps. The analyzer may have a hyper pre-concentrator having a number of channels. There are numerous detectors positioned along the flow path of the anal... | 05/06/2008 |
| 7367360 | Integrated piping plate, machining method for same, machining apparatus for same, and machining equipment for same A machining method for an integrated piping plate, for example, composed of a plurality of plates joined together, and in which an instrument and a component constituting an apparatus, or the instrument, or the component are or is disposed on one surface or both sur... | 05/06/2008 |
| 7360394 | Multi-purpose modular pyrolysis and thermal processing system for chemical and biological threat agent detection A multi-purpose modular pyrolysis and thermal processing system (MPMPTPS) for pyrolyzing and/or vaporizing liquids and solids to create an evolved vapor suitable for introduction into a gas-chromatography and/or vapor detection system, thereby allowing detection, cl... | 04/22/2008 |
| 7361206 | Apparatus and method for water vapor removal in an ion mobility spectrometer The present invention is directed to an apparatus and a method for continuously removing water vapor from a closed loop, re-circulated gas flow in an ion mobility spectrometer using a water permeable membrane, having a first side and a second side opposite the first... | 04/22/2008 |
| 7350427 | Sorbent collector material based on polyorganosiloxane The invention relates to a sorbent collector material based on polyorganosiloxane for the microextraction of substances to be analysed, the collector material having an open-cell foam structure, and to a collector and a liner which include this collector material. | 04/01/2008 |
| 7343779 | High performance, hand-held gas chromatograph, method and system A hand-held, ultra-sensitive gas chromatograph which provides real time detection and analysis of chemical compounds or impurities is disclosed. The detection sensitivity ranges from parts per trillion to parts per million with an average retention time ranging from... | 03/18/2008 |
| 7327068 | Sensors and related devices and methods Sensors that include SAW devices, related methods, and related devices. Many embodiments are included. Some of the present sensors include an inlet structure; a mounting structure that is spaced apart from the inlet structure, the mounting structure having a top sur... | 02/05/2008 |
| 7318908 | Integrated nanotube sensor Integrated nanotube sensors are adapted for detecting various chemical and biological molecules. In one implementation, nanotube sensor arrays are formed as nano-electronic noses capable of such detection, and can be implemented in devices including carbon nanotube-... | 01/15/2008 |
| 7316730 | Inlet double-seal assembly An inlet seal assembly for sealing an injection port member in a chromatography instrument , comprising an injection port member having a raised metal ring, an inlet seal member with an upper surface, a peripheral groove formed in the inlet seal member upper surface... | 01/08/2008 |
| 7311757 | Analyte pre-concentrator for gas chromatography An analyte pre-concentrator for gas chromatography is disclosed generally comprising a tube having a restricted outlet and packed with an adsorbent, wherein the tube serves as the liner of a chromatographic injector, as an adsorbent trap coupled to a chromatographic... | 12/25/2007 |
| 7293449 | Thermal modulation for gas chromatography A thermal modulator device for gas chromatography and associated methods. The thermal modulator device includes a recirculating fluid cooling member, an electrically conductive capillary in direct thermal contact with the cooling member, and a power supply electrica... | 11/13/2007 |
| 7288760 | Conformational real-time atmospheric and environmental characterization sampling apparatus and method The present invention relates generally to a method and apparatus for real-time environmental gas sampling. A manifold is disclosed allowing for real-time gas sampling and monitoring/analysis of atomospheric over a wide range of oxygen contents, e.g., oxygen-rich as... | 10/30/2007 |
| 7284409 | Thermal modulation for gas chromatography A thermal modulator device for gas chromatography and associated methods. The thermal modulator device includes a cooling member, an electrically conductive capillary in direct thermal contact with the cooling member, and a power supply electrically coupled to the c... | 10/23/2007 |
| 7284410 | 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 flowing into the column, such as by providing additional carrier gas ... | 10/23/2007 |
| 7281408 | Parallel gas chromatograph with microdetector array Gas chromatographs of the invention generally comprise four or more analysis channels. Specifically, four or more gas chromatography columns are configured for parallel analysis of four or more gaseous samples with detection being effected using a microdetector arra... | 10/16/2007 |
| 7279132 | Chemical vapor sensor having an active and a passive measurement mode A chemical vapor sensor is provided that measures a chemical species of interest with high sensitivity and chemical specificity. In an aspect, an ethanol vapor sensor is provided, sized for being inconspicuous and on-board a vehicle, having a passive measurement mod... | 10/09/2007 |
| 7261812 | Multi-column separation devices and methods Chromatographic separation devices include multiple batch-processed columns joined by a body structure and adapted to perform parallel analyses. Both slurry-packed and monolithic column embodiments are provided. One or more liquid-permeable frits of various types ma... | 08/28/2007 |
| 7260978 | Gas chromatography/mass spectrometry system A gas chromatography/mass spectrometry system includes two sample introduction parts, a gas chromatography part having two columns, a column oven for housing the two columns in a parallel configuration, an interface part through which an outlet end of each of the tw... | 08/28/2007 |
| 7258132 | Electronically controlled back pressure regulator An electronically controlled back pressure regulator comprises an analysis device having a vent coupled to the analysis device through a vent path, a pressure sensor coupled to the vent path, a proportional valve coupled to the vent path, the proportional valve conf... | 08/21/2007 |
| 7247276 | Micro-reactor for reactions between gases and liquids Described herein is a microreactor for carrying out chemical reactions between a reaction partner in liquid form and a reaction partner in gaseous form, if necessary in the presence of a solid catalyst, whereby the chemical process guidance takes place in spaces tha... | 07/24/2007 |
| 7246013 | Data processor for use in chromatographic analysis A data processor for analyzing chromatograms in detail and collecting analysis-associated information necessary for verification of data validity throughout an analysis process. The data processor includes a first data collecting section which collects and records a... | 07/17/2007 |
