|
Match
|
Document |
Document Title |
|
|
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...
|
|
|
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.
|
|
|
7527676 |
Unit for separating gas
A unit for separating an exhaust gas containing PFC gases including CF 4 and C 2 F 6 generated in a production process, wherein the exhaust gas is concentrated in a concentration device, and then...
|
|
|
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.
|
|
|
7520159 |
Gas chromatograph
The invention relates to a gas chromatograph for the analysis of gas samples. It has a feed arrangement for feeding the sample, an open tubular capillary column for separating the components of the...
|
|
|
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,...
|
|
|
7509837 |
Method and system for chemical and physical characterization of complex samples
A method and system for rapid determination of a composition, such as crude oils and fractions thereof, and s obtaining the information necessary to assess the yield of commercially valuable fuel...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
6838640 |
Separation microcolumn assembly for a microgas chromatograph and the like
A high-sensitivity, separation microcolumn assembly for a microgas chromatograph and the like is provided. The assembly has an ultra-low mass complete with integrated heaters. The assembly uses...
|
|
|
6829918 |
Method of and apparatus for measuring mercury contained in hydrocarbon
A method of and an apparatus for measuring mercury present in a hydrocarbon, wherein a gas (G) such as an air containing no mercury is allowed to flow through a column filled with an adsorbent...
|
|
|
6779379 |
Method and device for vaporization injection
The invention concerns a device for vaporizing injections of samples into a gas chromatography analysis device, comprising a vaporization chamber elongated lengthways and heated, as well as a...
|
|
|
6732567 |
Multilayered ceramic micro-gas chromatograph and method for making the same
A micro-gas chromatograph column is formed by texturing a channel into a plurality of green-sheet layers, which are then sintered together to form a substantially monolithic structure. A thick-film...
|
|
|
6670024 |
Glass-silicon column
A glass-silicon column that can operate in temperature variations between room temperature and about 450° C. The glass-silicon column includes large area glass, such as a thin Corning 7740...
|
|
|
6666907 |
Temperature programmable microfabricated gas chromatography column
A temperature programmable microfabricated gas chromatography column enables more efficient chemical separation of chemical analytes in a gas mixture by the integration of a resistive heating...
|
|
|
6663697 |
Microfabricated packed gas chromatographic column
A new class of miniaturized gas chromatographic columns has been invented. These chromatographic columns are formed using conventional micromachining techniques, and allow packed columns having...
|
|
|
6656738 |
Internal heater for preconcentrator
An apparatus for collecting and detecting chemicals contained in a fluid includes a sorbent element, at least one chemical sensor, a first pump for pumping fluid through the sorbent element and a...
|
|
|
6632268 |
Method and apparatus for comprehensive two-dimensional gas chromatography
A two-dimensional gas chromatograph with a primary column ( 14 ) and dual secondary columns ( 26, 28 ) is described. Flow rates in the primary column are less than those in the secondary columns...
|
|
|
6550961 |
Thermal conductivity detector
A thermal conductivity detector includes not only a thermal conductivity detector cell disposed so as to be heated by heat transmitted from a first heater block and a column connector connected to...
|
|
|
6509085 |
Fabrication of microfluidic circuits by printing techniques
Laminates having microfluidic structures disposed between sheets of the laminate are provided. The microfluidic structures are raised on a sheet of laminate, typically by printing the structure on...
|
|
|
6498042 |
PTFE matrix in a sample inlet liner and method of use
A sample inlet liner includes a novel matrix that serves to retain an injected sample. The preferred inert matrix is polytetrafluoroethylene (PTFE) that serves to retain an injected sample and is...
|
|
|
6497138 |
Multilayered gas chromatograph
The present disclosure relates to a gas chromatograph having a plurality of layers or channels. The chromatograph typically comprises an inlet that receives a sample to be analyzed, a column...
|
|
|
6368559 |
Device for analyzing organic compounds particularly in aqueous and gaseous samples
A device for analyzing organic compounds, particularly in aqueous and gaseous samples, constituted by a duct which is supplied in input by a gas whose pressure can be controlled by means of a...
|
|
|
6338823 |
Gas chromatograph
A gas chromatograph has a pressure sensor measuring a pressure in a sample introduction part, a flow control valve controlling carrier gas flow rate, a flow sensor measuring a flow rate of the...
|
|
|
6311544 |
Selective removal of volatile substances injected into a chromatographic packing filled column
A flow of a carrier gas through a column is provided. A sample is provided in the column, and a temperature of a longitudinally short portion of the column is raised to a predetermined controlled...
|
|
|
6305213 |
Device in a gas flow cell and a method of analyzing chemical substances by means of the gas flow cell
The present invention relates to a device in gas flow cells for the analysis of chemical substances by spectrophotometry. The gas flow cell has two longitudinal ducts, which are connected by a...
|
|
|
6301952 |
Gas chromatographic device
A gas chromatographic device has an inlet system, a column and a pressure reducing means combined and assembled in such a series arrangement that provides adequate system performance with shorter...
|
|
|
6046450 |
Reduction furnace for quantitative deuterium determination in hydrogen-containing samples
The invention relates to a method for the quantitative determination of deuterium in samples containing hydrogen, and to a reduction oven for reducing gaseous or liquid substances containing...
|
|
|
6033459 |
Gas collection apparatus, gas analyzing apparatus using the same and gas analyzing method
In a denuder (2) serving as a gas collection apparatus, an absorption liquid supply tube (4) for spraying absorption liquid from a nozzle (4a) to the inner wall of a denuder pipe (2a) is provided...
|
|
|
6029498 |
Chromatographic column for microwave heating
A chromatography column for microwave heating either incorporates microwave absorbing material into the column itself or positions the column adjacent to microwave absorbing material so that the...
|
|
|
5997708 |
Multilayer integrated assembly having specialized intermediary substrate
A multilayer integrated assembly for effecting fluid handling functions includes complementary microstructures formed by an etching or similar process in a planar foldable substrate. The...
|
|
|
5808178 |
High speed gas chromatography
A high speed gas chromatography system includes a heated isothermal region and a gas chromatography column located externally to the isothermal region. The system also includes a detector and a...
|
|
|
5792943 |
Planar separation column for use in sample analysis system
A planar separation column device for use in gas or liquid phase sample analysis. The planar separation column device includes complementary microstructures formed in a planar foldable substrate....
|
|
|
5783741 |
Capillary furnace for improved peak resolution in gas isotope chromatography
An isotope ratio monitoring gas chromatograph-mass spectrometer (irm-GC/MS) unit for generating a chromatogram having improved resolution for peaks representative of individual carbon dioxide...
|
|
|
5719322 |
Zeolitic capillary columns for gas chromatography
Methods have been found to prepare fused silica capillary gas chromatographic columns where the stationary phase is a molecular sieve affixed to the silica capillary wall without the aid of an...
|
|
|
5679576 |
Gas chromatographic analysis of fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether
The present invention provides a method in which organic matter in the product accompanied with a non-reacted hydrogen fluoride can be handled without damaging the apparatus, using a cross-linked...
|
|
|
5610322 |
Device for packing chromatography columns
A device, consisting of a chromatography column which is closed off at the top by a plunger and, at the bottom, by a connection piece and has one or more lateral openings in the upper part, a...
|
|
|
5595709 |
Instrument for measuring non-methane organic gases in gas samples
An analytical system for measuring the concentration of non-methane organic gases within a test sample including methane and non-methane component groups. In one version, a dual column analysis...
|
|
|
5482677 |
Thermally desorbable passive dosimeter
A passive dosimeter with a structurally reinforced sorbent wafer is used for monitoring a worker's exposure to ambient aromatics (benzene, toluene, ethylbenzene and xylenes). The wafer is...
|
|
|
5453382 |
Electrochromatographic preconcentration method
Solutions of analytes in concentrations too low for certain analytical techniques such as various capillary electrophoresis techniques are concentrated in a solid-phase adsorption medium by a...
|
|
|
5398539 |
Correlated multi-dimensional chromatography with confirmatory hybrid run
In a correlated two-dimensional gas chromatography system, it is necessary to "pair" peaks from one chromatogram with respective peaks of another chromatogram. Both peaks of a pair should...
|
|
|
5376252 |
Microfluidic structure and process for its manufacture
The microfluidic structure comprises first and second substantially planar form-stable base layers and an intermediate spacing layer of elastic material, said spacing layer being recessed to define...
|
|
|
5373725 |
O-FID analytical equipment and method
An anlytical equipment and method for the selective detection of individual oxygenated compounds in complex organic mixtures, in particular fuels, comprising, downstream an equipment of...
|
|
|
5298225 |
Detachable column cartridge gas chromatograph
A detachable column cartridge for a gas chromatograph is disclosed. The cartridge column contains analytical and reference columns, a heater and a thermocouple, and connects via detachable...
|
|
|
5152176 |
Process and apparatus for determining the quality of impurities in a gas by chromatography in gas phase and utilization for measuring the quantity of doping impurities in silane
The apparatus for determining the quantity of impurity in a gas by chromatography in gas phase comprises a device for cryogenically trapping impurities, which is provided with a column filled with...
|
|
|
5048322 |
Heated column inlet gas chromatography method and apparatus
The invention describes a large volume on-column gas chromatographic method for analyzing trace levels of high molecular weight and polar compounds in a sample and an apparatus for performing the...
|