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Document Title |
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7569189 |
Opening and closing a container
An apparatus for opening and closing a container having a slidable shutter closure moving past the apparatus includes: a rotatable shaft having an axis perpendicular to the direction of travel of...
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7553450 |
Irreversible humidity exposure dose indicator device
An irreversible humidity exposure dose indicator device, including a housing sealed at a first end thereof and adapted at a second end thereof to admit ambient gas ingress into an interior volume...
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7514265 |
Aldehyde detection kit and method thereof
The present application describes a reagent system for detecting presence of aldehyde in a sample that includes (i) Component A, which includes bisulfite, pararosalinine, and hydrochloric acid; and...
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7087434 |
Automatic portable formaldehyde analyzer
An apparatus for measuring the concentration of formaldehyde in an exhaust stream from turbines, internal combustion engines and the like, which apparatus includes a portable housing having a...
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6913932 |
Formaldehyde-ammonium salt complexes for the stabilization of blood cells
A stabilization reagent composition, particularly desirable for stabilizing blood samples containing platelets, contains reactants that generate multiple species of formaldehyde-ammonium complexes;...
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6835573 |
Method and device for testing aldehyde in polyester polymer
A test strip, methods for making and using the test strip, and a kit are described, which allow for the simple and efficient determination of the acetaldehyde content in a polyester polymer. The...
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6818450 |
Use of infrared spectroscopy for on-line process control and endpoint detection
The present invention is directed to an analytical method for measuring the concentration of an N-(phosphonomethyl)iminodiacetic acid (“NPMIDA”) substrate, an N-(phosphonomethyl)glycine...
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6706526 |
Low formaldehyde producing blood diluent
A low formaldehyde containing aqueous blood diluent contains an effective amount of ethylenediamine tetraacetic acid, ethylenediamine tetraacetic acid derivative, or combinations thereof; an...
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6689617 |
Agent for detecting malondialdehyde, method of making the same, and test kit for use thereof
A reagent for use in detecting the presence of aldehyde particularly in an aqueous solution, urine, or other body fluids comprising a solution sodium metabisulfite, phosphoric acid, basic fuchsin...
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6541267 |
Methods for testing oxidative stress
Method and compositions for determining oxidative stress in a subject are provided in which presence of an aldehyde in a biological fluid is correlated with an oxidative stress in a subject. A test...
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6436716 |
Aldehyde test strip
A composition, method, and device for quantitatively determining the concentration of an aldehyde in a sample are disclosed. The device includes a test pad having a suitable carrier matrix...
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6436311 |
Sampling material for a carbonyl compound in a gas
A sampling material for a carbonyl compound in a gas comprising a reagent capable of converting a carbonyl compound to a derivative thereof supported on a cation exchanger; and a sampling cartridge...
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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...
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6136608 |
Method for determining formaldehyde present in air
The concentration of formaldehyde in air is measured by the method of the invention. More specifically, the invention relates to a method for analyzing formaldehyde in air by collecting the air and...
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5932434 |
Method for identifying weeds resistant to inhibitors of acetolactate synthase
Resistance of given plant tissue to an inhibitor of acetolactate synthase is identified by (a) combining in an aqueous medium a sample of the plant tissue, the inhibitor of acetolactate...
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5766952 |
Vapochromic platinum-complexes and salts
The present invention relates to a process for indicating the presence of organic vapors comprising the steps of determining the color, absorption or emission spectra of a Pt--Pt double-complex...
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5538899 |
Analyzing for alkyl ketene dimers
A method of analysing a sample for alkyl ketene dimer (AKD) comprises treating the sample (or extract thereof) with a reagent which will react with an AKD to produce a detectable derivative. The...
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5525522 |
Method for fixing a biological preparation
Biological preparations or specimens are treated for a subsequent microscopic inspection. For this purpose it is necessary that the inner structure that is to be studied does not change prior to...
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5447688 |
Detector, and method of using same
A detector, which is source specific, for detecting a fugitive emission from a component containing a gaseous or volatile analyte, and is adaptable for adjacent disposition to the component. The...
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5372947 |
Assay for an aldehyde or a compound capable of releasing an aldehyde
An aqueous sample containing methylenebisthiocyanate or another compound capable of releasing an aldehyde is assayed by determining the amount of aldehyde released by conversion with respect to a...
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5332548 |
Analytical device and method of using same
The invention provides an analytical device, and method of using same, for detecting a gaseous or volatile analyte and adaptable to be applied directly to the surface of a solid material from which...
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5290702 |
Method of detecting and mapping organic solvent-containing materials on a surface
Chromogenic solvent detectors are used to detect and map the presence of organic solvent-containing materials on a surface. The detector need only be applied to the surface to be tested. When...
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5260219 |
Method of determining nitrogen balance and fat loss for persons involved in diet and/or physical training program
A test kit for determining the relative level of nitrogen of a user who is involved in a health program where diet and exercise are monitored and adjusted for optimizing physical development, the...
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5205988 |
Apparatus for measuring gaseous aldehyde
An apparatus for detecting gaseous aldehydes is disclosed which contains a detachable aldehyde capturing system and an aldehyde detection system. The gaseous aldehyde is passed across a...
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5132227 |
Monitoring formaldehyde
Methods and apparatus for monitoring formaldehyde vapor in a gas, comprising directing the gas into contact with an aqueous acidic solution that can dissolve the vapor and thus collect it therein,...
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5106647 |
Method to manufacture gas monitoring test strips
A simple, inexpensive, and versatile device for measuring gaseous substances and a method for manufacture of such devices are described. The device comprises a reflectant backing upon which is...
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5071769 |
Method and device for ketone measurement
Methods and materials detect ketone and aldehyde analytes in fluid samples by reacting analyte containing samples with a first solid matrix material to which a nitroprusside salt is coupled and a...
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4970172 |
Method and device for ketone measurements
The present invention relates to methods and materials for the detection of ketone and aldehyde analytes in fluid samples by means of reacting analyte containing samples with a first solid matrix...
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4946705 |
Integrated exposure monitoring device
A simple, inexpensive, and versatile device for measuring gaseous substances and a method for manufacture of such devices are described. The device comprises a reflectant backing which is disposed...
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4758521 |
Assay of ketones in ambient air
A method of assaying ketones in ambient air comprising contacting the air with beaded activated carbon followed by desorption with a solvent and analysis of the solvent solution for ketone content...
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4753891 |
Schiff test for rapid detection of low levels of aldehydes
An improved Schiff's reagent for detection of aldehydes (such as formaldehyde and gluteraldehyde) contains a para-rosaniline compound (such as para-rosaniline hydrochloride), orthophosphoric acid,...
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4666859 |
Reagent for colorimetrically indicating the presence of formaldehyde
A novel colorimetric reagent for the selective determination of formaldehyde in solution or in air is described. The reagent comprises at least two chemicals: rubeanic acid or a rubeanic acid...
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4588696 |
Pellet process for the detection of formaldehyde and/or glutaraldehyde
A kit containing three tablets is used in a process for testing for formaldehyde and/or glutaraldehyde in a sensitive, rapid, and simple manner that is practical even when glucose is present. A...
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4552849 |
Method for determination of formaldehyde
In a method of formaldehyde determination by measuring the fluorescence of a fluorescent substance formed by the reaction of a formaldehyde-containing solution with a fluorescent reagent capable of...
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4511658 |
Colorimetric detector for formaldehyde vapor
A sensitive colorimetric detector for formaldehyde vapor is prepared by applying a ketone solution of 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (AHMT) to a support coated with a stable metal...
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4489164 |
Colorimetric method for detecting aldehydes in air
A transparent glass detection tube contains a bed of silica gel which has been impregnated with sulfuric acid. One end of the tube is open to the outside air while the other end is connected to a...
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4466942 |
Gaseous contaminant dosimeter
A personal dosimeter for the collection of formaldehyde is improved by modifying the sodium bisulfite absorbant medium with sodium bicarbonate.
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4411867 |
Reduction gas detector
Apparatus for detecting the concentration of a gas by measuring the amount of mercury vapor generated when the gas is passed through a mercuric oxide bed. The apparatus includes a body having a...
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4397956 |
Means for monitoring the status of control of ketoacidosis-prone diabetics
Method and test system for monitoring the status of control of ketoacidosis-prone diabetics using pseudo-kinetic methods. Pseudo-kinetic clinical information is obtained by analysis of a single...
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4363635 |
Method and apparatus for measuring breath alcohol
A method and apparatus for discriminating between alcohol and acetone in a breath sample and accurately measuring the alcohol level when acetone is present in the sample. The breath sample is...
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4324558 |
Method of monitoring toxic fluids
A toxic-monitoring material for the detecting and monitoring of toxic fluids placed in contact with or exposed to the monitoring material, which material comprises a solid, microporous,...
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4198208 |
Method and apparatus for vapor detection
The method disclosed herein may be practiced by passing the vapors to be sampled along a path with halogen vapor, preferably chlorine vapor, heating the mixed vapors to halogenate those of the...
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4132768 |
Ultramicro-quantitative determination of acetone and kit suitable therefor
Process for ultramicro-quantitative determination of acetone comprising (1) reacting radioactive molecular or cationic iodine with the acetone contained in a sample from biological preparations in...
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4125373 |
Measurement of trace ethylene glycol in oil
A method for determining ethylene glycol in motor oil in the range of about 10 to about 100 parts per million (ppm) in which ethylene glycol is extracted from an oil sample using water as...
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4114422 |
Method of monitoring diet
A method of monitoring diet includes introducing a sample of aveolar air into a device capable of measuring acetone quantitatively in amounts at least as small as 0.3 mcgm/l (microgram per liter);...
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4083691 |
Method for detecting contaminants in water
A method for rapidly detecting organic pollutants in water utilizing cheml effervescence to accelerate release of contaminants into the atmosphere above the water sample where they can be detected...
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4036589 |
Determining the concentration of a biocide additive in a liquid
A method and a kit for testing the biocide concentration of a liquid containing a biocide of the type which breaks down in acidic aqueous solution to liberate formaldehyde. A strong aqueous acid is...
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3951602 |
Spectrophotometric formaldehyde-copper monitor
In an apparatus comprising a spectrophotometer, an inspection cell, and an electroless copper plating bath containing copper ions and formaldehyde for measuring the copper ion concentration of the...
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3945798 |
Formaldehyde test element and method of use
A test element is provided which can detect and measure extremely low concentrations of formaldehyde in the environment. The test strip comprises a support having thereon a formaldehyde-sensitive...
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3915638 |
Method for determination of glycolic acid
A spectrophotometric method for the quantitative determination of glycolic acid and precursors thereof is based on the color produced with beta-naphthol in hot 92.5% by weight sulfuric acid. A...
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