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| Number | Title | Issue Date |
| 8104330 | Method and apparatus for analysis by liquid chromatography In order to obtain a temperature gradient elution method which is rapid and accurate, a mobile phase (1) is supplied through two mobile-phase flow channels (2a) and (2b), mixed together, and introduced into the column (15) w... | 01/31/2012 |
| 7882729 | Liquid gas vaporization and measurement system and method A liquid gas vaporization and measurement system, and associated method, for efficiently vaporizing a continuous sample of liquid gas, such as liquid natural gas (LNG), and accurately determining the constituent components of the gas. A constant flow of liquid gas s... | 02/08/2011 |
| 7530259 | On-chip temperature controlled liquid chromatography methods and devices An apparatus for liquid chromatography comprises a liquid chromatography separation column on a substrate, wherein the separation column is coupled to a heater on the substrate. A chip-based temperature controlled liquid chromatography device comprises a substrate, ... | 05/12/2009 |
| 7338208 | Methods and apparatus for CT system thermal control architecture A method of cooling a medical imaging system that includes a gantry is provided. The method includes supplying air to the gantry. The supplied air is conditioned to reduce variation of the temperature within the gantry. After the air is conditioned it is channeled t... | 03/04/2008 |
| 7278329 | Chromatography system with blockage determination There is provided a method that includes, (a) monitoring a pressure on a fluid being conveyed through an intake tube into a chamber by a pump, (b) determining a deviation of the pressure from a predefined value, (c) determining a blockage of the intake tube based on... | 10/09/2007 |
| 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 corresponding to each of the plurality of detectors. The plurality of chromato... | 09/11/2007 |
| 7236562 | Method of assembly and thermal management of CT detector electronics circuits Disclosed herein is a method for assembly of Computed Tomography (CT) Detector electronic circuits. A thermally conductive adhesive is dispensed on a first side of a first circuit board, the first circuit board having a plurality of ball grid arrays and a plurality ... | 06/26/2007 |
| 7178386 | Parallel fluid processing systems and methods A parallel fluid processing system including multiple fluid process regions containing solid material in fluid communication with a common first fluid source may be used to conduct analyses and/or synthesis in parallel. A parallel fluid processing data correction me... | 02/20/2007 |
| 7086279 | Fraction collector for composition analysis A method and apparatus for controlling fraction collection in an eluent stream flowing from an LC column. A triggering detector recognizes the presence of a target substance according to characteristics of chromatographic peaks in the eluent stream and initiates a d... | 08/08/2006 |
| 7010964 | Pressurized microfluidic devices with optical detection regions Microfluidic analytical devices and systems have at least one porous element disposed downstream of one or more optical detection regions in a pressure-based separation system. A porous element elevates the backpressure within an optical detection region, thus suppr... | 03/14/2006 |
| 6860137 | Liquid transfer device, control method of liquid mixing ratio thereof and liquid chromatograph with liquid transfer device In obtaining an accurate mixing ratio of a liquid mixture, an actual mixing ratio of at least two different liquids mixed together is obtained, wherein the two kinds of liquids have a predetermined mixing ratio and are mixed by setting switching valves for the liqui... | 03/01/2005 |
| 6767467 | Fraction collection delay calibration for liquid chromatography A fraction collection system for liquid chromatography includes a conduit, which directs a sample eluent from an LC column through a flow splitter to a destructive analytical detector such as a mass spectrometer to analyze sample components, and to a fraction collec... | 07/27/2004 |
| 6755074 | Liquid chromatographic method and system To economically perform preparatory chromatography, a plurality of pumps each having a corresponding one of a plurality of pistons and a corresponding one of a plurality of cylinders are driven by one motor to draw and pump solvent simultaneously into corresponding ... | 06/29/2004 |
| 6601439 | Method of reducing baseline instabilities in liquid chromatographic measurements and liquid chromatography apparatus A method of reducing baseline instabilities in liquid chromatographic measurements is disclosed. A mobile phase comprising sample substances passes through a chromatographic column comprising a stationary phase, and subsequently through a detector. An add... | 08/05/2003 |
| 6484569 | Tube-in-tube thermal exchanger for liquid chromatography systems A thermal exchanger for a liquid chromatography system is provided. The tube-in-tube thermal exchanger comprises a first and a second sections of tubing, a first connector and a second connector. The first section of tubing carries sample solution from th... | 11/26/2002 |
| 6408684 | Detection device for apparatus for analysis A detection device for an apparatus for carrying out analysis such as a chromatograph includes not only a detector for outputting detection signals but also a stabilization judging unit for measuring drift and noise of these detection signals over time an... | 06/25/2002 |
| 6406633 | Fraction collection delay calibration for liquid chromatography A fraction collection system for liquid chromatography includes a conduit, which directs a sample eluent from an LC column through a flow splitter to a destructive analytical detector such as a mass spectrometer to analyze sample components, and to a frac... | 06/18/2002 |
| 6354145 | Process control The present invention relates to a method for analyzing mixtures of components by a process selected from the group consisting of flow based separation processes and flow analysis processes. The method comprising the steps of: obtaining measurement signal... | 03/12/2002 |
| 6345528 | High-temperature characterization of polymers with HPLC system having multiple mobile-phase reservoirs Rapid characterization and screening of polymer samples to determine average molecular weight, molecular weight distribution and other properties is disclosed. Rapid flow characterization systems and methods, including liquid chromatography and flow-injec... | 02/12/2002 |
| 6276195 | Three capillary flow-through viscometer A method and apparatus for measuring the viscosity of a sample solution which comprises an input tube for transporting a sample solution flow towards a splitter for diverting input flow into two distinct flow streams where three capillary tubes are locate... | 08/21/2001 |
| 5804142 | Chromatograph system and method for maintaining system suitability thereof A reference sample having a known concentration is injected into a chromatograph system before an unknown sample is analyzed. This is for the purpose of checking the deterioration of system performance or in other words for the purpose of checking system ... | 09/08/1998 |
| 5543315 | Method for stabilizing measurement values by high speed liquid chromatography The relationship of variations in the retention time of a specific component of a measurement blood sample with respect to changes in change-over time of the eluting solution is determined. The retention time of the specific component of the measurement b... | 08/06/1996 |
| 5436166 | Method of and apparatus for performing chromatography analysis of unknown sample The present invention relates to a chromatography analysis method and a system employing the same which are capable of automatically determining an constituents to be detected contained in the unknown sample based on results on measuring a standard sample... | 07/25/1995 |
| 5399256 | Electrochemical detector cell An electrochemical detector cell includes a first block having a planar first working surface, and a first working electrode embedded in the first block member. The first working electrode includes analyte contacting surface disposed co-planarly with the ... | 03/21/1995 |
| 5290520 | Analytic separation arrangement and method for the analysis of chemical samples An analytic separation arrangement includes a system of tubes including a separation zone, preferably a separation column, which tubes upstream the separation zone are connected with reservoirs for a carrier and a chemical sample to be seperated and analy... | 03/01/1994 |
| 5242586 | Column protection system for liquid chromatography system A liquid chromatography column protection system having a system pump, a bubble trap, and a column includes detectors for monitoring certain system conditions such as the presence of air or overpressurization and valves and controlling means for shutting ... | 09/07/1993 |
| 5106756 | Method and system for gathering a library of response patterns for sensor arrays A method of gathering a library of response patterns for one or more sensor arrays used in the detection and identification of chemical components in a fluid includes the steps of feeding samples of fluid with time-spaced separation of known components to... | 04/21/1992 |
| 4941101 | Method for analyzing chromatograms A method for resolving severely overlapped chromatogram peaks using Jansson's iterative deconvolution method is disclosed. The method requires only a knowledge of the impulse response function of the chromatographic apparatus and maximum peak height. A hi... | 07/10/1990 |
| 4927532 | Device for the compensation of the baseline drift of a chromatographic separating column The baseline drift occurring during a temperature or flow rate program in a chromatographic separating column is compensated for by signals from a function generator. The function generator supplies a computed baseline signal which is a representation of ... | 05/22/1990 |
| 4875169 | Method for improving the limit of detection in a data signal A method for improving the limit of detection for a data set in which experimental noise is uncorrelated along a given abscissa and an analytical signal is correlated to the abscissa, the steps comprising collecting the data set, converting the data set i... | 10/17/1989 |
| 4772388 | Apparatus for liquid chromatography To stabilize flow rate in a single-stroke, syringe-type high pressure pump to a constant value after turn-on, a control system increases the pump speed until equilibrium conditions are reached and then pumps at the preset rate. In one embodiment, the cont... | 09/20/1988 |
| 4567753 | Independent analysis of anions and cations using indirect photometric chromatography An improved technique and apparatus for the independent measurement of anions and cations in solution, wherein the sample ions are chromatographically displaced in a plurality of ion exchange columns by an eluting ion which is or is made light-absorbing a... | 02/04/1986 |
| 4406158 | Apparatus and method for temperature correction of liquid chromatography To reduce errors in a single-stroke, syringe-type high pressure pump caused by changes in temperature, the temperature of the pump is maintained slightly above ambient by a thermostat-heater system. The volume of liquid within the pump is measured by meas... | 09/27/1983 |
| 4357668 | Base line correction method and apparatus In a solvent gradient liquid chromatography system, base line shift is compensated by operating the system in a calibrate cycle with a desired solvent gradient program while subtracting and recording in digital form correction factors sufficient to mainta... | 11/02/1982 |
| 4019372 | Chromatographic detector system The present invention is a liquid chromatograph comprising a chromatographic column; means, including a pump, connected to the input of the column for injecting a sample under pressure into the column; and a detector system, including an optically transpa... | 04/26/1977 |
