Perfume compositions having controlled spatio-temporal olfactory profiles are described. The disclosure also relates also to a method of measuring said spatial-temporal olfactory profiles of said compositions.

A configuration is provided in which outside air is taken as a carrier gas into a carrier gas flow path (A, B). A CO.sub.2 sensor (specific gas detection sensor) (71) for detecting a CO.sub.2 gas desorbed from a sample is installed in a component gas detector (70). A CO.sub.2 sensor (air-containing specific gas detection sensor) (54) for detecting a CO.sub.2 gas contained in air taken into the carrier gas flow path by a blower fan (51) is installed separately. A CO.sub.2 gas detection amount detected by the air-containing specific gas detection sensor (54) is subtracted from a CO.sub.2 gas detection amount detected by the specific gas detection sensor (71) to calculate a detection amount of the CO.sub.2 gas desorbed from the sample.

A method for a multistep analysis of a measuring program of a portable gas measuring device includes performing a factory setting of the portable gas measuring device, connecting a container having a known gas standard and performing a reference measurement, wherein a multidimensional reference measurement is recorded, selecting a measuring program for target materials from a list on the device, performing a measurement on a sample in dependence on the selected measuring program, wherein a multidimensional measured variable is recorded, automatically performing an analysis to identify at least one of the one or more target materials in the sample and the respective concentrations thereof, wherein the analysis is based on the multidimensional measured variable from the measurement on the sample, the multidimensional reference measurement for the gas standard, the values for the plurality of target materials or measuring programs, and the factory setting for the portable gas measuring device.

A breathing air laboratory on location gas sample test and data collecting system and method, at a remote breathing air provider's facility, that includes an air compressor, for remotely testing, collecting, and monitoring the quality and purity of the breathing air being produced at the provider's facility, that allows an accredited independent monitoring, testing, and analyzing facility to provide breathing air validation and certification to a cloud-based air quality test and analysis account belonging to the breathing air provider facility at any time. The system includes redundant gas sample air sensors for O2 and CO to ensure quality and accuracy in the breathing air test and data collection, and analysis and a canary gas sample test module securely mounted in a laboratory chassis, but manually swappable, to ensure credibility and accuracy of the sensors being used to test gas/air samples.

A method for characterizing an analyte A present in a gas sample using an electronic nose including M sensitive site, a parasitic chemical species P being present in the gas sample, the method include: a phase 100 of acquiring N first signatures, where N>1, of the gas samples containing the analyte A and the parasitic species P, the gas samples exhibiting deviations ?c.sub.P(n) which differ from one gas sample to the next; a phase 200 of solving an optimization problem so as to obtain N corrected signatures, characterising the analyte A present in the N gas samples, from the N first signatures, by optimizing to objective functions.

A gas transport system includes at least one chemical reactor having at least one inlet and at least one gas outlet and at least one sample introduction unit for delivering the sample into the chemical reactor. The gas transport system at least one carrier gas line fluidly coupled to the chemical reactor inlet for introducing into the chemical reactor carrier gas from a carrier gas source, at least one gas outlet line from the chemical reactor gas outlet, and at least one gas recycling line connected to the gas outlet and/or the gas outlet line by a first gas line junction that is arranged between the chemical reactor and a downstream detection unit on the gas outlet line. The gas transport system is adapted to allow recycling of at least a portion of gas emerging from the chemical reactor outlet back to the chemical reactor via the gas recycling line.

A method for detecting and quantifying elemental mercury vapor in one or more solid sample. The method being particularly suitable for detecting and quantifying elemental mercury vapor in solid samples obtained from a petroleum reservoir by subjecting the solid samples to conditions that cause the release of one or more volatile compound therefrom including elemental mercury vapor, using a carrier gas to transport the released one or more volatile compound into a first trap to capture one or more volatile compound other than the elemental mercury vapor, and finally into an additional trap downstream of the first trap to capture the elemental mercury vapor for analysis and quantification.

The invention provides a novel method for synthesizing hyperpolarized xenon-129 (HP Xe) biosensors by using pseudo-rotaxane structures of gamma-cyclodextrin. These supramolecular complexes form novel ternary structures in the presence of HP Xe which can be detected via .sup.129Xe MR spectroscopy and imaging techniques. The rotaxane-type complex can be tagged with an affinity label for detecting a target in a biological subject.

A breathing air laboratory on location gas sample test and data collecting system and method, at a remote breathing air provider's facility, that includes an air compressor, for remotely testing, collecting, and monitoring the quality and purity of the breathing air being produced at the provider's facility, that allows an accredited independent monitoring, testing, and analyzing facility to provide breathing air validation and certification to a cloud-based air quality test and analysis account belonging to the breathing air provider facility at any time. The system includes redundant gas sample air sensors for O2 and CO to ensure quality and accuracy in the breathing air test and data collection, and analysis and a canary gas sample test module securely mounted in a laboratory chassis, but manually swappable, to ensure credibility and accuracy of the sensors being used to test gas/air samples.

Disclosed is an apparatus and method for analyzing an evolved gas, wherein the precision of detection of a gas component is improved without enlarging the apparatus. The apparatus includes a gas component evolving unit, a detection member for detecting the gas component, and a mixed gas channel for allowing a mixed gas containing the gas component and carrier gas to flow therethrough, and further includes a branch channel branched from the mixed gas channel, an inert gas channel for allowing an inert gas to flow therethrough, a first flow rate regulator for adjusting the flow rate of the carrier gas, a second flow rate regulator for adjusting the flow rate of the inert gas, and a flow rate control unit for controlling the second flow rate regulator such that the flow rate of the mixed gas guided to the detection member is a predetermined value.