scentroid

Dynamic Dilution Olfactometry

Dynamic Dilution Olfactometry  is based on “dilution to threshold” of a gas sample with multiple components. Odour threshold is a commonly used term. It is the minimum concentration detectable or…

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EN 13725 – YES/NO Mode

The assessor is asked to evaluate gas presented from a specific port and to indicate if an odour is perceived ( YES/NO). The assessor is aware that in some cases…

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EN 13725 – Forced Choice Mode

The assessor is presented with two or more ports, of which one presents the stimulus and the other(s) neutral gas.The location of the stimulus in consecutive presentation is randomly distributed…

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Federal Clean Air Act (FCAA)

A federal law passed in 1970 and amended in 1974, 1977 and 1990 which forms the basis for the national air pollution control effort. Basic elements of the act include…

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Fugitive Releases

Unintentional emissions from, for example; flanges, valves, doors, windows; that is, points which are not designated or intended as release point.Its an emissions of gases or vapors from pressurized equipment due…

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Gas Chromatography

This analytical technique is a form of chromatography that separates and detects compounds by the rate in which they move through an inert or un-reactive carrier gas such as nitrogen,…

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Odour abatement efficiency

The reduction of the odour concentration or the odour flow rate due to an abatement technique, expressed as a fraction (or percentage) of the odour concentration in or the odour…

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Particulate Matter (PM)

Tiny solid or liquid particles that are suspended in air. Particulate matter is produced from a wide variety of sources like natural and human-caused, large and small. They are comprised…

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PhotoIonization Detector (PID)

The PhotoIonization Detector (PID) is a portable vapor and gas detector that detects a variety of organic compounds. Photo ionization occurs when an atom or molecule absorbs light of sufficient energy to cause an…

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