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| Number | Title | Issue Date |
| 7381564 | Method of calibrating the zero point of an apparatus used to determine a quantity of silica using a colorimetric method A method of calibrating the zero point of an apparatus which is used to determine the quantity of silica contained in a silica solution sample to be analysed, using a colorometric method. The colorometric method used by the apparatus consists of successively introdu... | 06/03/2008 |
| 7348181 | Self-encoding sensor with microspheres A microsphere-based analytic chemistry system is disclosed in which self-encoding microspheres having distinct characteristic optical response signatures to specific target analytes may be mixed together while the ability is retained to identify the sensor type and ... | 03/25/2008 |
| 7229830 | Standard sample composition and manufacture thereof A standard sample composition containing a complexing agent and an alkali salt, mixed with a known amount of a foodstuff, the content of at least one component of which is accurately known. The mixture is dissolved in a solvent, e.g. water, and comminuted to form a ... | 06/12/2007 |
| 7141431 | Microparticles with multiple fluorescent signals and methods of using same This invention provides a novel fluorescent particle including a core or carrier particle having on its surface a plurality of smaller polymeric particles or nanoparticles, which are stained with different fluorescent dyes. When excited by a light source they are ca... | 11/28/2006 |
| 7122376 | Calibration standards, methods, and kits for water determination The invention relates to a formed tablet calibration standard-reagent for calibrating Karl Fischer reactions for determining water content in a substance, the reagent containing a first component, namely sodium tartrate dihydrate, and a second component, namely magn... | 10/17/2006 |
| 7109035 | Synthetic urine and method of making same A synthetic urine formulation, a kit including the synthetic urine formulation and a method of preparing synthetic urine are described. The urine formulation includes urine components in dried form, concentrated form or normal concentration and a compound that, when... | 09/19/2006 |
| 7052916 | Polypeptide analyses using stable isotope labeling Methods for incorporating a stable isotope into a protein or peptide fragment are disclosed. The methods include providing isolated isotope-labeled protein or peptide fragments and analyzing the isolated labeld fragments. In another aspect of the invention, methods ... | 05/30/2006 |
| 7049146 | Calibration standards, methods, and kits for water determination The present invention relates to a formed tablet calibration standard-reagent for Karl Fischer reactions to determine the water content of substances, such as pharmaceuticals, food stuffs, and oils. ... | 05/23/2006 |
| 6649414 | Microparticles with multiple fluorescent signals and methods of using same This invention provides a novel fluorescent particle including a core or carrier particle having on its surface a plurality of smaller polymeric particles or nanoparticles, which are stained with different fluorescent dyes. When excited by a light source ... | 11/18/2003 |
| 6635487 | Fluorescence standard for use in microfluidic instruments A test device for use as a fluorescent standard in microfluidic analytical detection systems includes one or more slits that correspond to, and are of similar dimension to, one or more microchannels in a detection region on a corresponding analysis chip. ... | 10/21/2003 |
| 6599746 | Calibration fluid for calibrating a sensor for measuring a blood value and methods for producing and using the fluid The calibration fluid is composed of a biocompatible electrolyte that, at 37° C., exhibits a concentration of bicarbonate ions that lies in the normal physiological range of the concentration of the bicarbonate ions of the blood, exhibits a pH value that... | 07/29/2003 |
| 6451607 | External dried-reagent control for analytical test devices A control device serving as a source of control reagent for a solid-phase analytical test device is disclosed. The analytical test device analyzes a biological sample for the presence of an analyte such as an enzyme or other chemical species or a particul... | 09/17/2002 |
| 6358743 | Contraband substances reference sample carrier A carrier for contraband substances to be used as a reference for testing trace detection systems. The carrier, which has the consistency of hand cream and can be dispensed from a tube or a syringe, is inert with respect to the contraband substances and d... | 03/19/2002 |
| 5891730 | Method to prepare dye-based reference material Provided is a method of preparing dye-based reference materials useful for calibrating or qualifying instrument systems that are diagnostic spectroscopically for hemoglobin and CO-ox fractions. The dye-based reference materials are non-proteinaceous and m... | 04/06/1999 |
| 5637505 | Method to prepare dye-based reference material Provided is a method of preparing dye-based reference materials useful for calibrating or qualifying instrument systems that are diagnostic spectroscopically for hemoglobin and CO-ox fractions. The dye-based reference materials are non-proteinaceous and m... | 06/10/1997 |
| 5633166 | Method of analyzing medical specimens with improved length of analytical run determination In high volume laboratory analysis of patient medical specimens, control materials are inserted at periodical intervals (e.g. once per eight hours) and analyzed. If the results of the analysis deviate from the mean according to statistical rules, the run ... | 05/27/1997 |
| 5559035 | Solid phase calibration standards Solid phase ionic calibration standards are disclosed that comprise sparingly and selectively soluble solids. The calibration standards are especially useful in calibration pH electrodes used to monitor weak ionic strength solutions, and permit rapid pH e... | 09/24/1996 |
| 5435171 | Apparatus for automatically preparing solution of powdery product as specimen for use in viscosity measurement An apparatus for supplying a solution of a powdery product as a specimen of viscosity measurement. The apparatus includes electronic discharge-weighing device (4) for determining the amount of the powdery sample in sample container (2), introduced into ho... | 07/25/1995 |
| 5401664 | Analytical method for determining concentration of decomposition products in solvent used for solvent extraction A safe analytical technique for determining the concentration amount of dibutyl and monobutyl phosphate degradation products in the TBP-dodecane solvent used in solvent extraction processes. This method of chemical analysis eliminates the use of diazometh... | 03/28/1995 |
| 5364642 | Ionized magnesium2+ concentrations in biological samples The present invention provides a method for preparing and storing biological samples prior to measuring ionized Mg2+ concentrations in order to obtain accurate and reproducible readings. A novel method for accurately reading ionized magnesium i... | 11/15/1994 |
| 5344779 | Method for production of standard oxide sample for X-ray fluorescence spectrometry A method for the production of a standard oxide sample for X-ray fluorescence analysis of an impurity element contained in an inorganic compound. The standard oxide sample is produced by accurately weighing a high-purity compound of the type of the main-c... | 09/06/1994 |
| 5312756 | Total organic carbon (TOC) and total inorganic carbon (TIC) calibration system There are essentially three aspects to the present invention. In a first aspect, there is provided solid-phase calibration materials for selectively imparting predetermined inorganic or organic carbon levels to a fluid stream by dissolution, comprising so... | 05/17/1994 |
| 5288642 | Shelf-stable milk calibration standards A calibration standard for calibrating machines which count the somatic cells in a milk sample, comprises an aqueous dispersion of microbeads bearing a fluorescent dye, a suspending agent, and an electrolyte; the dye has an excitation wavelength below 580... | 02/22/1994 |
| 5258308 | Method, kit and apparatus for verifying calibration and linearity of vertical photometers A method and apparatus for calibrating or checking the calibration of vertical photometers. The invention may also provide easy and convenient assay results for diagnostic profiles. The invention comprises pre-dispensed amounts of a suitable reagent, chos... | 11/02/1993 |
| 5250441 | Method for kit for estimating the amount of methyl anthranilate A method and kit for estimating the amount of methyl anthranilate includes obtaining a sample suspected of having methyl anthranilate, acidifying the sample with a strong acid, adding sodium nitrite to the acidified sample producing nitrous acid which in ... | 10/05/1993 |
| 5238845 | Method for producing a CO2 calibration liquid A method for producing a liquid phase substance having a pre-established concentration of CO2 suitable for calibrating analytical instruments such as hemogasanalyzers consists in: preparing an aqueous solution of precisely known strength of a w... | 08/24/1993 |
| 5227305 | Buffer solution systems for standardizing pH analyzers and electrolytes A formulation of combined-composition electrolyte and pH buffers for use as standardization solutions in analyzers for clinical chemistry which simultaneously use more than one ion-selective electrode plus more than one standard solution. Each ion is pres... | 07/13/1993 |
| 5204264 | Method for validation of calibration standards in an automatic chemical analyzer In an automated analyzer that measures concentration of samples by comparing changes in a detector response caused by said samples to a calibration curve or factor based on one or more different calibration standards stored in the analyzer, a replacement ... | 04/20/1993 |
| 5183761 | Method of making calibration solution for verifying calibration and linearity of vertical photometers A method and device for calibrating or checking the calibration of vertical photometers. The invention may also provide easy and convenient assay results for diagnostic profiles. The invention comprises pre-dispensed amounts of a suitable reagent, chosen ... | 02/02/1993 |
| 5070023 | Aqueous ferrioxalate compositions useful as calibrants Aqueous acidic ferrioxalate compositions are disclosed for use as calibrants of pCO2 and of PO2 after photodecomposition. Compositions with high iron(III) to oxalate molar ratios (e.g., 5:1 to 100:1 with 0.3 to 15 millimolar oxalate) produce carbon dioxid... | 12/03/1991 |
| 5013666 | Control for blood gas/calcium analysis instrumentation A liquid control standard for the use in the quality assurance of blood analysis instrumentation systems is disclosed. The liquid control standard is able to act as a control standard for blood gas instrumentation systems measuring pH, pCO2 and... | 05/07/1991 |
| 4945062 | Control for blood gas/calcium analysis instrumentation A liquid control standard for the use in the qualilty assurance of blood analysis instrumentation systems is disclosed. The liquid control standard is able to act as a control standard for blood gas instrumentation systems measuring pH, pCO2 an... | 07/31/1990 |
| 4935373 | Reference liquid A reference liquid for calibration or quality control of instruments which determine ionized calcium and pH. The reference liquid contains both a particular calcium ion activity and a pH-buffer and can therefore be used for calibration of both the calcium... | 06/19/1990 |
| 4886965 | Method for calibrating variable wavelength liquid chromatography detectors A method for determining the wavelength accuracy of a variable wavelength liquid chromatography detector in the low UV range comprising filling the cell of the detector with a test solution and varying the indicated wavelength of detection to find the ind... | 12/12/1989 |
| 4871678 | Agent and process for the determination of calcium An agent and process are used for the determination of calcium in liquids. The agent contains essentially orthocresolphthalein complexone, an acid and a zwitterionic buffer and is characterized in that the buffer contains at least one sulphonic acid amine... | 10/03/1989 |
| 4868126 | Method of calibrating a fluorescent microscope using fluorescent calibration microbeads simulating stained cells A method of calibrating a flow cytometer or fluorescent microscope is based on a set of highly uniform microbeads associated with a fluorescent dye in such a way that the microbeads have the same excitation and emission spectral properties as the samples ... | 09/19/1989 |
| 4843013 | Multiple control standard for blood analysis This invention discloses a multiple control standard for the use in the quality assurance of blood analysis instrumentation systems. The liquid control standard is able to act as a control standard for blood gas instrumentation systems measuring pH, pCO2 ... | 06/27/1989 |
| 4806486 | Calibration liquid for ion-specific electrodes, process for preparing them and their application A calibration liquid, especially suitable for ion-selective electrodes, containing albumin. This solution is stable and prevents errors by junction potentials or unknown complexing with calcium.... | 02/21/1989 |
| 4753888 | Multiple control standard for blood analysis This invention discloses a multiple control standard for the use in the quality assurance of blood analysis instrumentation systems. The liquid control standard is able to act as a control standard for blood gas instrumentation systems measuring pH, pCO2 ... | 06/28/1988 |
| 4714682 | Fluorescent calibration microbeads simulating stained cells A method of calibrating a flow cytometer or fluorescent microscope is based on a set of highly uniform microbeads associated with a fluorescent dye in such a way that the microbeads have the same excitation and emission spectral properties as the samples ... | 12/22/1987 |
