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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....
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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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7572319 |
Analyte pre-concentrator for gas chromatography
An analyte pre-concentrator for gas chromatography is disclosed generally comprising a tube packed with an adsorbent, wherein the tube may serve as the liner of a chromatographic injector, as an...
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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...
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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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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...
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7507273 |
Chromatographic rectification of ethanol
A scalable technology for purifying ethanol, wherein the vaporization of ethanol is coupled with a chromatographic rectification process comprising feeding a vaporized ethanol/water mix onto a...
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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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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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7091044 |
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....
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6955709 |
Method and device for vaporization injection of high volumes in gas chromatographic analysis
This invention concerns a method and apparatus for vaporization injection of large volumes of liquid sample (substance to be analysed+solvent) introduced by a syringe needle into a heated...
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6877363 |
Chromatography column
The invention relates to a chromatography column for high-pressure liquid chromatography, which can be provided with different connection systems, such as a cartridge retaining device or a reducing...
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6838288 |
Modulator for gas chromatography
This invention relates to a modulator for use in gas chromatographic analysis, adopted for alternatively trapping and releasing fractions of solutes in a length of a capillary column within a...
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6834531 |
Gas chromatograph modular auxiliary oven assembly and method for analyzing a refinery gas
An auxiliary modular oven assembly for use with a gas chromatograph. The auxiliary oven assembly is comprised of a housing, an oven compartment, a heater, at least one sampling valve, at least one...
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6706535 |
Pulsed carrier gas flow modulation for selectivity enhancements with gas chromatography using series-coupled column ensembles
A gas chromatography system having a computer-controlled venting valve system that delivers pressurized pulses to a column junction point of two series-coupled columns having different...
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6702874 |
Gas separation apparatus and gas separation method
Using a distillation separator, a gas to be treated is separated into a plurality of gas groups having different boiling points. Then, the specific gases included in each of the plurality of gas...
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6682699 |
Reduced power consumption gas chromatograph system
This invention provides a reduced power consumption gas chromatograph system ( 10 ) which includes a capillary gas chromatograph column member ( 12 ) which contains a chemical sample to be...
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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...
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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...
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6551387 |
Gas separation apparatus
A discharge gas containing PFC gas including CF 4 and NF 3 generated from a manufacturing process ( 10 ) is adsorbed at an adsorbing device ( 18 ) and then desorbed using nitrogen as a purge gas....
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6541273 |
Multiple sorbent cartridges for solid phase extraction
Methods and apparatus are disclosed which are useful for detecting the presence of various pesticides, including aryl pyrazoles such as fipronil. Pesticide residues are extracted from a variety of...
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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...
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6447575 |
Method and apparatus for gas chromatography analysis of samples
The invention relates to gas chromatography analysis of a sample having components to be investigated and water contained therein, which after thermodesorption is separated and analyzed, the...
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6402947 |
Interphase device for the direct coupling of liquid chromatography and gas chromatography
The basic structure of a PTV (programmed temperature vaporizer) injector has been considerably modified so that is can be used for the direct coupling of liquid chromatography in normal phase or...
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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...
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6306200 |
Hand-held multiple system gas chromatograph
A multiple parallel hand-held gas chromatograph (GC) system which includes several independent GCs. Each independent GC has its own injector, separation column, detector and oven and the GCs are...
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6190613 |
Sample concentration device
A sample concentration device is provided in which a gaseous sample is concentrated by cooling a portion of a gas transfer line through which the sample is introduced into a detecting apparatus,...
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6068684 |
Microstructure chromatograph with rectangular column
A novel chromatograph is provided. The chromatograph includes an analytical column which is a channel with a rectangular cross-section. Integrated with the chromatograph are a sample collection...
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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...
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6007602 |
Apparatus and method for chemical modulation
An apparatus and a method are described for forming a chemical modulation of a substance present in a fluid stream, which utilize a movable device, such as a movable heater, to induce changes in...
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6004514 |
Process gas chromatographic system
A gas chromatographic system for analyzing gas components includes an analyzer, a constant temperature oven, an analyzer case, an indicator, an integrated sample conditioner, and a coupler. The...
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5872306 |
Real-time gas-chromatography mass-spectrometry trace vapor detection
A gas flow distribution system accumulates a sample from a sample bearing carrier gas in a micro-accumulator, delivers it using a carrier gas to a gas chromatography column, and supplies a carrier...
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5846292 |
Chromatograph with column extraction
A gas chromatograph and method of chromatography are provided. Analytes, those compounds to be tested, are extracted from the sample by moving the sample into a column which has a stationary phase...
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5686655 |
Gas chromatograph/mass spectrometer system
Conventionally, the mass spectrometer unit is placed beside the gas chromatograph unit when the gas chromatograph unit is coupled with a mass spectrometer unit, whereas the normal detector is...
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5611846 |
Portable gas chromatograph
Gas chromatographs are disclosed that may be constructed to be portable, light, rugged, fast, sensitive, and to use only utilities (compressed gas and electricity) that are readily available in the...
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5578111 |
Process and a device for continuous chromatography
A process is described for the separation of a mixture of substances by sorption of the mixture's components on two different sorption agents, which are individually and independently adjustable in...
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5547497 |
Apparatus for gas chromatography
A gas chromatograph system including a cold trap having two portions, a capillary tube and a porous layer open tubular (PLOT) column, for substantially simultaneously trapping lower and higher...
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5522988 |
On-line coupled liquid and gas chromatography system with an interface capillary tube interposed between a pair of capillary chromatographic columns
Apparatus and method for on-line coupled liquid chromatography and gas chromatography analysis. The system includes a high-volume, liquid vaporizing chamber, or interface capillary tube which...
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5498279 |
High speed gas chromatography system for analysis of polar organic compounds
Gas chromatography systems which provide for high speed separation of polar compounds of interest from samples which also include non-polar compounds. Efficient separation is achieved through the...
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5492555 |
Automated two-dimensional interface for capillary gas chromatography
A multidimensional gas chromatograph (GC) system having wide bore capillary and narrow bore capillary GC columns in series and having a novel system interface. Heart cuts from a high flow rate...
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5470380 |
Management device for gas chromatography sample concentration
A water management system removes water vapor from the analyte slug that is desorbed from the trap. The water management system includes a device having a passage through which the volatile organic...
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5402668 |
High-resolution beer volatile analysis method
The invention is an apparatus and method for preparing volatiles collected from a sample for gas chromatographic analysis. Volatiles are collected from the sample in a volatile trap, such as a...
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5403386 |
Concentrator apparatus for detecting trace organic components in aqueous samples
An improvement to a sample concentrator apparatus for extracting and concentrating trace organic components from an aqueous sample for subsequent analysis; and a method for concentrating trace...
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5342515 |
Chromatographic column
This invention relates to a chromatographic column with a separation column which is equipped on at least one side with an end threading mechanism for connecting a capillary, a precolumn, or...
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5340475 |
On-line supercritical fluid extraction multidimensional chromatographic system
An on-line supercritical fluid extraction multidimensional chromatographic system and method is described which provides a cell for extracting a target compound in a supercritical fluid, and a...
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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...
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5288310 |
Adsorbent trap for gas chromatography
A gas chromatography system in which prefocusing of a sample analyte is provided through the use of an adsorbent coated porous layer open tubular trap tube. Through the use of an adsorbent coated...
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5281256 |
Gas chromatography system with column bifurcation and tunable selectivity
A gas chromatography system featuring column bifurcation and pressure tuning. The system of this invention incorporates a bifurcated system in which samples eluting from a first separation column...
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5205845 |
Mechanical gas chromatography injection valves and column multiplexing techniques
Several embodiments of gas chromatography systems are disclosed incorporating mechanical sample injection valves. The injection valves incorporate a delivery tube having an outlet which is swept...
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5135549 |
Chromatographic technique and apparatus
To provide a compact, sensitive comprehensive, two-dimensional gas chromatograph, a chromatographic column has first and second sections in series with each other to permit the flow of sample and a...
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