The subject invention provides materials, devices and methods for detecting, determining, monitoring and/or extracting trace metals such as cadmium, lead, copper, chromium, cobalt, nickel, zinc, manganese, mercury, and vanadium in the environmental, biological, pharmaceutical, and potable water samples. The subject invention also provides formulations and method for synthesizing the trace metal-extracting materials.

The present specification relates to a method for analyzing a deuterated compound by chromatography, and manufacturing an organic light emitting device using a deuterated compound selected based on the analyzed data.

Provided is a method of quantification of free sulfur that can accurately measure the free sulfur content of a rubber composition. The present disclosure relates to a method of quantification of free sulfur in a rubber composition, the method including extracting the free sulfur in the rubber composition with toluene.

The invention is directed to a method for chemiluminescent sulphur detection wherein the method comprises the following steps. (a) oxidation of a gaseous starting mixture comprising one or more sulphur compounds to obtain an oxidized gas mixture. (b) reduction of the oxidized gas mixture as obtained in step (a) to obtain a gaseous mixture of reduced sulphur compounds in the presence of a ceramic surface. (c) reacting the mixture of reduced sulphur compounds obtained in step (b) with ozone to obtain a sulphur compound in excited state and measuring a chemiluminescent emission of the sulphur compound in excited state to obtain a measure for the amount of sulphur compounds in the gaseous starting mixture. The ceramic surface in step (b) is a magnesium aluminium silicate comprising surface.

The invention is directed to a method for chemiluminescent sulphur detection wherein the method comprises the following steps. (a) oxidation of a gaseous starting mixture comprising one or more sulphur compounds to obtain an oxidized gas mixture. (b) reduction of the oxidized gas mixture as obtained in step (a) to obtain a gaseous mixture of reduced sulphur compounds in the presence of a ceramic surface. (c) reacting the mixture of reduced sulphur compounds obtained in step (b) with ozone to obtain a sulphur compound in excited state and measuring a chemiluminescent emission of the sulphur compound in excited state to obtain a measure for the amount of sulphur compounds in the gaseous starting mixture. The ceramic surface in step (b) is a magnesium aluminium silicate comprising surface.

Parts are exposed to liquid chromatography to generate a corresponding chromatogram, wherein the chromatogram is compared to a chromatogram of a genuine part to determine if the tested part is suspect counterfeit. Depending on the selected predetermined target analytes, the generated chromatogram can be used to assess an associated manufacturing process as conforming or non-conforming.

A backfilling-type online chromatographic detector for sulphur hexafluoride decomposition products includes: a compression pump, a vacuum pump, a gas storage tank, a first six-way valve, a second six-way valve, a first chromatographic column, a second chromatographic column and a detector. One end of the compression pump is connected to one end of the vacuum pump, another end of the vacuum pump is connected to one end of the gas storage tank, another end of the gas storage tank is connected to the first chromatographic column through the first six-way valve, the first chromatographic column is connected to the second chromatographic column through the second six-way valve, and the second chromatographic column is connected to the detector.

Provided is a quantitative determination method for sulfur compounds in a target group selected from a plurality of groups, e.g., a group including cysteine and related reactive sulfurs, including the steps of: performing an LC/MS/MS measurement of a standard substance having a known concentration of a base compound, e.g., cysteine, in the target group; acquiring quantitative reference information used for quantitative determination of the base compound and other reactive sulfurs, based on the measurement result, assuming that the signal intensities of sulfur compounds in the same group show a predetermined relationship when their concentrations are equal; performing an LC/MS/MS measurement for each sulfur compound in a specimen, under an analysis condition determined beforehand so that the signal intensities of sulfur compounds in the same group show the predetermined relationship when their concentrations are equal; and determining the quantity of each sulfur compound, using the measurement result and quantitative reference information.

A method for characterizing a brake fluid, the method comprising contacting a solvent with the brake fluid to provide a sample; introducing the sample into a first capillary column coated with a first stationary phase and allowing the sample to flow through the first capillary column to produce an effluent stream; and passing the effluent stream through a detector to identify one or more hydrocarbon components and optionally a detectable borate component, wherein the first capillary column is at a temperature effective for a borate ester in the sample, if any, to react with a portion of the solvent to form the detectable borate component.

A backfilling-type online chromatographic detector for sulphur hexafluoride decomposition products includes: a compression pump, a vacuum pump, a gas storage tank, a first six-way valve, a second six-way valve, a first chromatographic column, a second chromatographic column and a detector. One end of the compression pump is connected to one end of the vacuum pump, another end of the vacuum pump is connected to one end of the gas storage tank, another end of the gas storage tank is connected to the first chromatographic column through the first six-way valve, the first chromatographic column is connected to the second chromatographic column through the second six-way valve, and the second chromatographic column is connected to the detector.