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7604736 |
Laser welded frit
A method of forming a column ( 100 and 200 ) for use with an analytical chemical instrument. The method includes placing a frit ( 102 and 202 ) in proximity to a distal end ( 110 and 210 ) of...
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7604004 |
Personal oxygen concentrator
An oxygen separator for separating oxygen from ambient air utilizing a vacuum swing adsorption process has a mass of less than 2.3 kg. A carrier is mountable on a person to support the oxygen...
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7575676 |
HPLC column holder apparatus
An HPLC column holding apparatus used to mount an HPLC column in one of a plurality of positions is disclosed herein. The apparatus comprises a clip-device interface that secures the apparatus to a...
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7559226 |
Radiant thermal energy absorbing analytical column
An analytical column includes a coating that absorbs at least one of ultraviolet (UV) and visible (VIS) radiant energy and converts the radiant energy into heat.
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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...
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7534346 |
Chromatography columns
The present invention relates to a chromatography column that removes the longitudinal load from the column tube altogether and transfers it to a yoke and stanchion arrangement situated around but...
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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.
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7513936 |
Flat spiral capillary column assembly with thermal modulator
The gas chromatography (GC) column assembly described herein consists of capillary GC column material, such as fused silica or metal capillary tubing, which is constrained to lie in a flat,...
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7506533 |
Gas chromatograph module with an electronic device
The present invention is directed to a gas chromatograph (GC) module having a column assembly and a printed circuit board mounted to a valve assembly. A plurality of electronic devices are mounted...
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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...
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7485175 |
Device for positioning and holding a length of gas chromatographic column
The invention relates to a device for positioning and holding one or more chromatographic column lengths being subjected to one or more jets of fluid to change the temperature, especially in a...
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7476852 |
Ionization-based detection
Embodiments of the present invention relate to detector structures for use in a micro gas analyzer, preferably in a differential setup. The detector structures may comprise one or more detector...
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7452464 |
Chromatography column
A chromatography column having a longitudinal axis and comprising a column wall with a first end and a second end, a first end plate assembly removably connectable to said first end of the column...
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7409850 |
Systems and methods for maximizing heat transfer efficiency to and minimizing thermal gradients in an analytic column
An improved gas chromatograph system includes a radiant source, an insert located to receive an output of the radiant source, and an analytic column wound on a concave surface of the insert so that...
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7399410 |
Chromatographic column and methods for controlling sorbent density
Disclosed herein are apparatus and methods for mitigating column bed compression over time. This invention provides for an improved column design and method of controlling bed density in a...
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7390409 |
Membrane holder for membrane adsorber chromotography
Membrane holder for membrane adsorber chromatography comprising a housing body ( 12 ) with a reception space for at least one layer of adsorber membranes ( 22 ) and at least one first housing cap (...
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7384457 |
Seal for gas chromatography
A seal forming a fluid tight connection between a gas chromatography column and a sample inlet assembly is disclosed. The seal is formed by a metal injection molding process. The seal has a first...
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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...
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7383718 |
Single stage flow modulator for performing comprehensive chromatography
A single stage flow modulator for performing comprehensive chromatography comprises a first chromatographic column, a valve fluidically coupled to at least two fluid conduits, wherein when in a...
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7368000 |
Treatment of effluent gases
A method is described for recovering a noble gas, such as xenon or krypton, from a first gas mixture comprising a plurality of components, one of which is the noble gas and the others are typically...
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7361208 |
Chromatography oven with heat exchange and method of use
Methods and systems for cooling gas chromatography ovens that comprise a housing having a fluid entry and a sleeve positioned within the housing to provide a fluid gap between the inner surface of...
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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...
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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...
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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...
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7329386 |
Column packing material and method for producing the same
The first subject of this invention is a column packing material comprising:
a silica gel having a silanol group; a first chemical modification group which is bound to said silanol group; a...
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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...
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7309377 |
Method for separation of isotopes
This invention relates to a method for separation of isotopes, that is, to obtain isotopically pure fractions by separating natural 1 isotope mixtures in elements, where hydrogen is employed as...
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7306656 |
Gas chromatography apparatus
The invention relates to a gas chromatography apparatus with a cooling device, wherein the cooling device includes a closed cooling circuit containing a refrigerant, so that no refrigerant is wasted.
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7306649 |
3D miniature preconcentrator and inlet sample heater
The present invention relates to a three dimensional preconcentrator and inlet heater. The preconcentrator consists of a substrate with passageways, a conductive material coated to the top and the...
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7303610 |
Chromatography column assembly
Chromatography column assembly of the direct heating type, comprising at least a capillary column, at least a tubular structure which envelops the capillary column and is coaxial with it, means to...
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7291203 |
Negative temperature profiling using microwave GC apparatus
A method is disclosed for performing GC separations using a separation protocol including at least one negative temperature ramp, where the negative temperature ramp is controlled either by the...
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7273517 |
Non-planar microfabricated gas chromatography column
A non-planar microfabricated gas chromatography column comprises a planar substrate having a plurality of through holes, a top lid and a bottom lid bonded to opposite surfaces of the planar...
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7269994 |
Chromatograph/mass spectrometer
The present invention provides a chromatograph/mass spectrometer capable of producing a composite chromatogram from plural chromatogram signals without causing the baseline level to rise or the...
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7267796 |
Preparative liquid chromatograph using plural detectors
The preparative liquid chromatograph uses a plurality of detectors including a mass spectrometer, and a chromatogram generator is provided for generating a plurality of chromatograms each...
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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...
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7258726 |
Method and apparatus for measuring velocity of chromatographic pulse
An Apparatus and method for two-stage chromatographic separation uses thermal modulation. The chromatographic column or modulation tube ( 1 ) has a loop structure such that two portions of...
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7192629 |
Devices utilizing self-assembled gel and method of manufacture
Devices such as capillaries for capillary electrophoresis are formed by contacting a gel precursor with a substrate comprising a permeable material that has higher permeability for organic solvents...
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7175913 |
Porous hybrid particles with organic groups removed from the surface
A material for chromatographic separations, processes for its preparation, and separation devices containing the chromatographic material. In particular, porous inorganic/organic hybrid materials...
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7166212 |
Multicapillary column for chromatography and sample preparation
A multicapillary column especially useful for liquid chromatography and sample preparation comprising a plurality of uniform capillaries coated with an insoluble stationary phase, wherein the...
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7157004 |
Freeze drying for gas chromatography stationary phase deposition
The present disclosure relates to methods for deposition of gas chromatography (GC) stationary phases into chromatography columns, for example gas chromatography columns. A chromatographic medium...
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7147695 |
Microfabricated microconcentrator for sensors and gas chromatography
Devices for enhancing the sensitivity of a microsensor or any other micro device by providing on-line preconcentration. Microconcentrators that can be integrated with a sensor or a micromachined GC...
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7121276 |
Personal oxygen concentrator
An oxygen separator for separating oxygen from ambient air utilizing a vacuum swing adsorption process has a mass of less than 2.3 kg. A carrier is mountable on a person to support the oxygen...
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7107818 |
Method and device for comprehensive two-dimensional gas chromatography
A method for detecting substances or mixtures of substances within a sample in an apparatus for comprehensive two-dimensional gas-chromatographic analysis according to the present invention,...
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7105043 |
Sealing mechanism for gas chromatograph machines
A sealing mechanism for a gas chromatograph machine includes a weldment attachment mountable at the weldment assembly of the machine. The attachment has a passage therethrough for gas communicated...
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7041216 |
Chromatography column
The present invention relates to a chromatography column that removes the longitudinal load from the column tube altogether and transfers it to a yoke and stanchion arrangement situated around but...
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6986841 |
Fused-silica capillaries with photopolymer components
A separation column is provided with a photopolymer component which, when irradiated, causes controlled porosity polymerization. A particularly preferred embodiment is wherein the separation medium...
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6936165 |
Device for mounting an elongate element with axial clamping
Device for mounting an elongated element with axial clamping, includes a body forming a support base whereon are fixed a stop part including a first support element for one end of the elongated...
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6928858 |
Apparatus and method for thermal conductivity detection in gas chomatography equipment
A thermal conductivity detector includes separate sample gas and reference gas chambers. Each chamber has a gas inlet and a gas outlet and a sensor. The chambers are connected by at least one...
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6922238 |
Self-tuning pulse flame photometric detector system and associated method of self-tuning
A system and method for tuning a pulsed-flame photometric detector including providing a carrier gas within a predetermined gas flow range to the pulsed-flame photometric detector, providing at...
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6890372 |
Denuder assembly for collection and removal of soluble atmospheric gases
A denuder assembly is adapted for the collection and removal of a gaseous analyte from a sample gas. The denuder includes a housing including an internal cavity, a sample gas inlet fluidly coupled...
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