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| Number | Title | Issue Date |
| 8034624 | Sampling device A sampling device for analysis of a substance which is chosen from the group consisting of isocyanates, aminoisocyanates, amines, and isothiocyanates, and which is present in an air flow intended to pass through the sampling device is disclosed, as well as a method ... | 10/11/2011 |
| 7732215 | Cyanide sensing compounds and uses thereof The present invention relates to a cyanide detection method using fluorescence and cyanide sensitive boronic acid containing fluorophores, wherein a change in a measured fluorescent property correlates to the concentration of the cyanide compound in a biological or ... | 06/08/2010 |
| 7662635 | Device and method for detecting methylsothiocyanate A device and method in which the gas specimen to be investigated is exposed to one or more indicators for qualitative or quantitative detection of methylisothiocyanate, characterized in that at least one indicator is palladium sulfate. ... | 02/16/2010 |
| 7662634 | Method and device for determining the isomer composition in isocyanate production processes The invention relates to a method for determining the isomer composition in an isocyanate isomer mixture, wherein a spectrum of the isomer mixture is recorded and the spectrum is entered into a chemometric calibration model. ... | 02/16/2010 |
| 7260484 | Method for carrying out ion mobility spectrometry analyses A method for carrying out analyses of a gas comprising one or more species Si, Sj, . . . , Sn by using of ion mobility spectrometry includes in carrying out two subsequent analyses in different conditions and comparing the results of... | 08/21/2007 |
| 7186379 | Continuous real-time measurement of aqueous cyanide This invention provides a method and system capable of the continuous, real-time measurement of low concentrations of aqueous free cyanide (CN) using an on-line, flow through system. The system is based on the selective reactivity of cyanide anions and the character... | 03/06/2007 |
| 6967411 | Stackable layers containing ball grid array packages Layers suitable for stacking in three dimensional, multi-layer modules are formed by interconnecting a ball grid array electronic package to an interposer layer which routes electronic signals to an access plane. The layers are under-filled and may be bonded togethe... | 11/22/2005 |
| 6534317 | Use of isocyanates for assaying nucleophilic functions in the form of traces in wet medium A method for detecting traces of pollutant in aqueous media, wherein the method includes the use of isocyanates to react on the nucleophilic functions in the form of trace amounts in a wet medium. The method for assaying nulceophilic functions in a wet me... | 03/18/2003 |
| 6368870 | Controlled diffusion analysis A method is described for determining the presence of a volatile component in a test sample. The method involves use of two separate vessels, one of which is capable of being placed wholly within the other vessel. The test sample is placed in the larger v... | 04/09/2002 |
| 5965450 | Irradiation-distillation apparatus and method for measuring cyanide species A system for measuring the amount of cyanide species in a sample, namely total cyanide, dissociable cyanide, complex cyanide and thiocyanate, by using a single apparatus for simultaneous ultraviolet irradiation and distillation. The system which can be us... | 10/12/1999 |
| 5858798 | Method and apparatus for detecting amines and ammonia by fluorescence Primary amines, ammonia, or mixtures thereof can be detected using a reagent comprising from about 650 ppm to about 25 percent by weight of phthalic dicarboxyaldehyde; from about 74 to about 99.88 percent by weight of an alkali metal borate; and, from abo... | 01/12/1999 |
| 5665313 | Detecting agent A detecting agent for hydride gases (arsine, phosphine, silane, diborane, selenium hydride etc.) which comprises at least one member selected from molybdic acid, a salt thereof, a molybdenum-containing acid (molybdophosphoric acid, etc.) and a salt thereo... | 09/09/1997 |
| 5658999 | Syndiotactic polypropylene wax, production process thereof, and heating roll fixing-type toner composition making use of the wax Described herein are propylene waxes and a production process thereof. The waxes are each produced by polymerizing propylene in a reaction vessel while using a solid catalyst in the presence or absence of an organoaluminum compound. A hydrogen partial pre... | 08/19/1997 |
| 5510268 | Method and device for detecting substances in an ambient substance, in particular for detecting chemical warfare agents The invention relates to a method and an apparatus for individually detecting in ambient air a predetermined gaseous warfare agent, namely a poison gas of the class of organic sulfuric or phosphorous substances, and a predetermined interfering compound, e... | 04/23/1996 |
| 5500373 | Methods for determining the concentration of cyanide in sour aqueous systems A method for determining the concentration of cyanide in an aqueous system is disclosed. The method determines the cyanide concentration from a determination of reference thiocyanate concentrations and will measure the cyanide concentration in the presenc... | 03/19/1996 |
| 5496452 | Substrate regenerating biosensor A biosensor for the detection and determination of the concentration of toxins by use of enzyme inhibition. Inhibition biosensors are affected by non-specific denaturation and substrate utilization which both result in a limited operational lifetime. Thes... | 03/05/1996 |
| 5494640 | Device for identifying at least one gaseous component in a gaseous or liquid sample A sensor device is disclosed for identification of a gaseous component in a gaseous or liquid sample. The sensor device comprises an optode membrane having sensitivity for the gaseous component to be identified. The optode membrane incorporates two ionoph... | 02/27/1996 |
| 5470532 | Composite reactive articles for the determination of cyanide Composite reactive articles are useful for quantifying cyanide ions in solution. The composite reactive articles can be porous reactive supports comprising an inert substrate having immobilized thereon finely divided gold. The porous reactive supports can... | 11/28/1995 |
| 5382529 | Assay for dibromonitrilopropionamide A method of testing for the presence of dibromonitrilopropionamide in a sample, which comprises adding to the sample, under alkaline conditions and in the presence of magnesium ions, a phenolic or anilinic compound that generates a colour; and observing t... | 01/17/1995 |
| 5354689 | Method of detecting isocyanates The present invention provides for a method for detecting the presence of isocyanate in a sample by (a) contacting an isocyanate derivatizing reagent having the formula I R--R' (I) wherein R is 9-anthracenyl... | 10/11/1994 |
| 5340746 | Composite reactive articles for the determination of cyanide Composite reactive articles are useful for quantifying cyanide ions in solution. The composite reactive articles can be porous reactive supports comprising an inert substrate having immobilized thereon finely divided gold. The porous reactive supports can... | 08/23/1994 |
| 5208164 | Process for monitoring alkanolamine solutions (a) An alkanolamine solution containing anions, a conductance probe connected through a meter to a recorder and a stirrer are provided in a container, (b) the solution is stirred at a constant rate and metering and recording of the conductance of the alka... | 05/04/1993 |
| 5192690 | Process for the analytical determination of acetylcyanamide in urine The present invention is directed to a process for the analytical determination of acetylcyanamide in urine. It involves (a) the separating of acetylcyanamide at from a urine matrix and/or an extract which is obtained from a urine matrix by ion exchange c... | 03/09/1993 |
| 5061637 | Process for the removal and qualitative analytical determination of cyanide in contaminated soils The process for the removal and qualitative analytical determination of cyanide in cyanide-contaminated soils consists of introducing biologically degradable organic acids into the soil while blowing a gas stream therethrough and subsequently oxidizing th... | 10/29/1991 |
| 5055266 | Method for detecting toxic gases A method capable of detecting low concentrations of a pollutant or other component in air or other gas, utilizing a combination of a heating filament having a catalytic surface of a noble metal for exposure to the gas and producing a derivative chemical p... | 10/08/1991 |
| 4918024 | Method for determination of dicyanodiamide in plants or parts of plants The present invention is a method for determination of dicyanodiamide in a plant matrix, i.e. in a plant or a part of a plant. It involves a series of steps including extracting any dicyanodiamide from the plant matrix as well as purifying the dicyanodiam... | 04/17/1990 |
| 4871681 | Method for the colorimetric determination of the cyanide concentration of aqueous solutions According to the invention, cyanide concentrations of approximately 0.001 to 5 mg cyanide/1 are colorimetrically determined in a continuous manner by means of the known cyanidepicric acid color reaction. The solution containing free cyanide and/or cyanide... | 10/03/1989 |
| 4837166 | Assaying method for primary amines using aromatic dialdehydes A method of assaying primary amines or cyanide is disclosed. The process is carried out by reacting a substituted or unsubstituted naphthalene-2,3-dicarboxaldehyde or o-phthalaldehyde, reactive with primary amines and cyanide, with cyanide ions and at lea... | 06/06/1989 |
| 4804631 | Method and apparatus for measuring cyanide A system for measuring cyanides in a sample employs a photoillumination component for producing ultraviolet radiation to dissociate cyanides contained in an alkaline sample. The system includes filtering components interposed between the photoillumination... | 02/14/1989 |
| 4758520 | Chemiluminescence method for assaying compounds containing primary amino groups using 1-cyano-2-substituted benz(f)- or naphth(f)-isoindole fluorescers A chemiluminescence method for assaying compounds containing primary amino groups using 1-cyano-2-substituted benz(f)- or naphth(f)-isoindole fluorescers is disclosed. The 1-cyano-2-substituted benz(f)- or naphth(f)-isoindole (CBI or CNI) is formed by rea... | 07/19/1988 |
| 4692415 | Process for the determination of cyanamide in plants and plant parts The present invention provides a process for the determination of cyanamide in plants or plant parts, wherein (a) the cyanamide is extracted from the plants, (b) it is subsequently reacted in aqueous alkaline medium with 1,2-naphthoquinone-4-sulphonate to give... | 09/08/1987 |
| 4613575 | Indicator for determining organic isocyanates on a carrier Organic isocyanates are detected with an indicator comprising bis-4-(dimethylamino)-phenyl-methylenimine-hydrochloride provided on a carrier along with a catalyst for its reaction with the organic isocyanates contained in a tested gas. Through an acid dev... | 09/23/1986 |
| 4576793 | Analytical element There is disclosed an analytical element comprising a support; a reagent layer which is positioned on one side of the support and contains a reagent reactive with a component in a fluid sample; and a porous spreading layer which is positioned on the reage... | 03/18/1986 |
| 4420567 | Hydride gas detecting tape A tape coated with an adsorbent and impregnated with a processing solution which includes silver nitrate, an acid, an alcohol and a glycol is a sensitive detecting means for hydride gases and is stable upon exposure to light.... | 12/13/1983 |
| 4404287 | Method and apparatus for determining chemical species A method for the quantitative determination of a chemical species capable of promoting the disproportionation of Hg22+ to Hg2+ and Hg° in solution which method comprises causing the species to react with a solution compri... | 09/13/1983 |
| 4379848 | Method of analyzing an aqueous liquid for hexacyanoferrates Colorimetric analysis for the presence or concentration of hexacyanoferrates in an aqueous liquid is carried out by forming a colored indicator compound which is soluble therein. The analysis is based on the use of a cobaltic complex of tris-1,10-phenanth... | 04/12/1983 |
| 4321059 | Process for the analytical determination of hydrogen cyanide in gases Hydrogen cyanide in hydrogen cyanide containing gas is transformed into ammonia by a special iridium catalyst in the presence of at least the equivalent amount of hydrogen for the change. The ammonia is analyzed to provide a measure of the hydrogen cyanid... | 03/23/1982 |
| 4299593 | Method and apparatus for detecting and measuring a gas A technique is described for continuously detecting or measuring a gas such as hydrogen cyanide in a gas stream. The gas stream is passed in counterflow relationship with a well defined stream of gas absorbing reagent liquid in an absorption cell through ... | 11/10/1981 |
| 4271125 | Indicator device for the quantitative determination of metal cyanides in aerosol form An indicator device for the quantitative determination of aerosol-type metal cyanides, including a tube provided with a bore extending therethrough, a front layer of a substrate material impregnated with sulfuric acid or phosphoric acid and a following in... | 06/02/1981 |
| 4267023 | Chemically integrating dosimeter and gas analysis methods A chemically integrating dosimeter for measuring gases, composed of a dual membrane system and an internal electrolyte solution. The outer membrane is a gas permeation rate controlling membrane. The inner membrane is a microporous hydrophobic protective m... | 05/12/1981 |
