|
Match
|
Document |
Document Title |
|
|
7611901 |
Method for determining the content of diesel fuel in a lubricating oil of a combustion engine
A method for determining proportion of diesel fuel in a lubricating oil of a combustion engine, including: forming a mixture containing an oil sample and a C 5 hydrocarbon such as a C 5 alkane;...
|
|
|
7493795 |
Gas detection method and gas detection apparatus
The present invention provides a gas detection method and detection apparatus that provide better sensitivity and faster recovery after response than conventional gas detection methods and...
|
|
|
7496453 |
Classification of herbal medicines using wavelet transform
An efficient, effective and reliable method for authentication of herbal medicines (HMs) based on a novel wavelet-enhanced automated three-dimensional chromatograms classification system. The...
|
|
|
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...
|
|
|
7412872 |
Process for screening outgas emissions in semiconductor processing
The present description relates to a process for measuring outgas emissions in fabrication chambers used for semiconductors, micromachines and the like. In one embodiment, the invention includes...
|
|
|
7360434 |
Apparatus and method to measure air pressure within a turbine airfoil
A pressure tap probe having a flexible probe tip that is flexible enough to seal a film cooling hole having a roughened surface such as a TBC applied around the hole. The flexible probe tip is...
|
|
|
7359804 |
System and method for calibrating remote emissions sensing instruments
A system and method is provided for obtaining calibration curves for CO and CO 2 during laboratory calibration of one or more remote emissions sensing (RES) instruments, and for self-calibration...
|
|
|
7270020 |
Instrument assemblies and analysis methods
The disclosure relates to instrument assemblies that can include a sample introduction port coupled to a chamber configured to receive the sample from the sample introduction port and provide...
|
|
|
7257987 |
Method and apparatus for sample analysis
Methods and systems for analyzing samples, such as gas samples, are described. One method comprises providing a gas sample, increasing pressure applied to the gas sample to compress the sample to a...
|
|
|
7140231 |
Evolved gas analyzing method and apparatus
An evolved gas analysis system contains a first measurement step of heating a first sample containing measurement target material and non-measurement target material at a predetermined temperature...
|
|
|
7059112 |
Degradation detection method for an engine having a NOx sensor
An engine diagnostic system for use with an internal combustion engine coupled to a lean NOx trap with a NOx sensor coupled downstream of the trap. Degradation of the NOx sensor is determined by...
|
|
|
6968729 |
Method and apparatus for expediting analysis of samples
The present invention comprises a method for expediting the analysis of a plurality of samples, preferably using gas chromatography. A specific embodiment comprises a dual isothermal heated zone...
|
|
|
6883365 |
Focusing device for volatile and semivolatile organic compounds in the gaseous phase
A focusing device for volatile and semi-volatile organic compounds in the gaseous phase, comprising a support structure, a container for said organic compounds, a cooling element and a heating...
|
|
|
6856917 |
Data processing apparatus for chromatograph
A method of properly correcting a base line. A concept of flexibility of a base line is introduced as an input index and a gravitation is presumed between the base line and signal data which is...
|
|
|
6781384 |
Enhancing the stability of electrical discharges
An electronic circuit and a method of generating an electrical discharge for an ionization detector system. The electronic circuit includes a transformer with a primary portion and a secondary...
|
|
|
6573492 |
Mass spectrometric analysis method and apparatus using the method
In a spectrometric analysis method and an apparatus implementing the method, a data base storing spectral data sets of respective standard substances, which are obtained by analyzing these standard...
|
|
|
6497136 |
Trace-level gas analysis apparatus and method
A trace-level gas analysis apparatus having a diffusion scrubber 11 that captures atmospheric gas components and a sampling tube 10 that guides air into the diffusion scrubber 11 is provided...
|
|
|
6494078 |
Retention-time locked comprehensive multidimensional gas chromatography
A method applies retention-time locking to the retention times and/or the column(s) void times of a target analyte(s) being eluted thru a multidimensional gas chromatography system. Retention time...
|
|
|
6386014 |
Energy measurement device for flowing gas using microminiature gas chromatograph
A system for determining the energy and volume delivered by a flowing natural gas carried within a pipeline based on BTU content analysis of the natural gas using a micro-miniature gas...
|
|
|
6357277 |
Method and equipment for the realignment of peaks in gas chromatographic analyses
The invention concerns a method for the realignment of peaks in gas chromatographic analyses after the replacement of the used capillary column with a nominally equal one, wherein a K coefficient...
|
|
|
6338824 |
Method for detection of extremely low concentration
An ultratrace detector system for hand-held gas chromatography having high sensitivity, for example, to emissions generated during production of weapons, biological compounds, drugs, etc. The...
|
|
|
6257047 |
Method and apparatus for the introduction of large volume samples in capillary columns for gas chromatography
The invention concerns a method and an apparatus for the direct injection of large volumes (>3 μl) of samples into the column in a gas chromatography analysis apparatus comprising an oven, a...
|
|
|
6225132 |
Enhanced chromatography using multiphoton detection
A method for detecting an analyte of interest present in a mixture at an ultralow concentration includes selecting a radioactive derivatizing agent comprising a multiphoton-emitting radioisotope...
|
|
|
6210465 |
Method for identification of components within a known sample
A method for identifying components within a known type of sample through pattern recognition between an array of recognition coefficients generated from the attributes and stable relationships of...
|
|
|
5987959 |
Automated retention time locking
The invention provides a method for automated matching of retention times obtained using a known chromatographic method having a defined set of column parameters and operating parameters to the...
|
|
|
5969228 |
Method and devices for chromatographic pattern analysis employing chromatographic variability characterization
Method and devices for performing chromatographic pattern analysis determine chromatographic variability due to a plurality of sources without requiring identification or characterization of peaks...
|
|
|
5841022 |
Gas analyzer and gas analysis method
The present invention provides a gas analyzer used for contamination control of a clean environment by collecting samples from a plurality of measurement points while switching these points and...
|
|
|
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....
|
|
|
5670379 |
Chromatograph system and method of use
A chromatograph system with improved automation is provided. In the chromatograph system of one embodiment, a regression line is set between retention times of predetermined peaks measured at each...
|
|
|
5591406 |
Automatic exhaust gas analyzer for an internal combustion engine
An automatic exhaust gas analyzer for analyzing an exhaust gas of an internal combustion engine. The analyzer includes: a) plural analyzing units; b) two independent gas lines provided in each of...
|
|
|
5542286 |
Method and apparatus for correcting flow and pressure sensor drift in a gas chromatograph
A method and apparatus for correcting flow and pressure sensor drift in a gas chromatograph. At a convenient time when the chromatograph is not being used for analysis, the input valves controlling...
|
|
|
5524084 |
Method and apparatus for improved flow and pressure measurement and control
In the preferred embodiment, the invention is embodied in the pneumatic manifold of a gas chromatograph to provide current operating temperature and pressure compensation of inlet fluid flow. The...
|
|
|
5310681 |
Selective detection with high speed gas chromatography
A highly selective, sensitive, fast detection system and method are disclosed for detecting vapors of specific compounds in air. Vapors emanating from compounds such as explosives, or stripped from...
|
|
|
5305887 |
Method and apparatus for examining the gaseous content of returned drink bottles
For the effective, rapid, but still cost-effective, simple analysis of the content of containers, such as returned non-disposable drink bottles, the invention provides a method for examining the...
|
|
|
5116764 |
Dual-column, dual-detector gas detector and analyzer
A dual-column, dual-detector gas detector and analyzer employs both a photo-ionization detector and a flame-ionization detector. In a survey mode, samples of ambient air are driven through both...
|
|
|
5009099 |
Background correction method for use in gas chromatography
A method of correcting for background changes in a plasma emission detector comprising a photodetector array is disclosed. In the photodetector array a plurality of sensors are used to detect the...
|
|
|
4935040 |
Miniature devices useful for gas chromatography
Laminated wafers with channels formed therein define a plurality of gas chromatographic columns in a body, with substantially minimal connecting channels between an injector and a detector. One or...
|
|
|
4741198 |
Thermal conductivity detector assembly
The present invention relates to a gas chromatography assembly comprising a high mass, thermally conductive body provided with at least one cell in which is disposed a resistance filament for the...
|
|
|
4512181 |
Pressure compensation for a chromatograph
In a chromatographic analysis, errors in the chromatographic analysis caused by barometric pressure variations are corrected by dividing the actual measured analysis (C m ) by a correction factor...
|
|
|
4442217 |
Sample injection
Samples of substances from sources of variable temperature and pressure are injected into a stream of fluid carrier, for example in chromatographic analysis, without bringing them into contact with...
|
|
|
4420679 |
Gas chromatographic oven using symmetrical flow of preheated - premixed ambient air
A temperature controlled oven apparatus having a central chamber with a heater element and a pivotal inner baffle door, located within a removable outer access door, periodically opened or closed...
|
|
|
4403520 |
Control valve for a direct on-column injector and injection method
An apparatus for controlling the injection passage of on-column injector is disclosed. The apparatus includes a valve having at least one channel inside it and leading to the injection passage for...
|
|
|
4359891 |
Repetitive chromatographic apparatus
A repetitive gas chromatograph employing a backflush valve downstream from the detector and a separate sample injection valve located upstream located directly upstream from the single...
|
|
|
4271695 |
Apparatus for feeding carrier gas to on-column injectors
An apparatus for feeding carrier gas at a constant rate to on-column injectors for capillary and micropacked gas-chromatographic columns. The apparatus includes a constant pressure gas delivering...
|
|
|
3879984 |
GAS FLOW CONTROL
This is a flow control system for maintaining a constant flow rate of a gas to detector of gas chromatographic apparatus at various flow rates of the gas through the chromatographic column of the...
|
|
|
3824838 |
PROCESS GAS CHROMATOGRAPHIC APPARATUS
A control system in a process gas chromatographic apparatus for analyzing a stream sample from a chemical process plant, comprises a peak senser means for sensing a detector signal, a programming...
|
|
|
3443415 |
DIFFERENTIAL FLAME IONIZATION CHROMATOGRAPHIC ANALYSIS
|
|
|
3299693 |
Gas chromatographic analysis control apparatus
|
|
|
3283563 |
Gas chromatographic system having barometric pressure compensation
|
|
|
3247703 |
Automatic zeroing system
|