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A photoionization detector or PID is a type of gas detector. Typical photoionization detectors measure volatile organic compounds and other gases in concentrations from sub parts per billion to 10 000 parts per million (ppm). The photoionization detector is an efficient and
The WOLF eNose is a commercially available system of chemical sensor arrays using both electronic and colorimetric sensors for the detection of volatile organic compounds, and it has been employed for detection of urinary tract infection-causing bacteria. [42] [43]
A gas detector is a device that detects the presence of gases in a volume of space. Gas detectors come in various form factors depending on the application. This includes handheld gas detectors, wall-mounted gas detectors, gas detectors with a built-in pump used with a probe, gooseneck gas detectors, and benchtop gas detectors.
The shape of the response curves are different between the two detectors. [6] Both detectors require the use of fully volatile mobile phases and non-volatile samples. CAD response is dependent on organic content of the mobile phase, response is higher with organic-rich mobile phases than aqueous ones. [16] [15]
It captures potentially harmful volatile organic compounds (VOCs) during refueling. [1] Without such a system, fuel vapors trapped inside gas tanks would be released into the atmosphere, each time the vehicle was refueled. [2]
The operation of the FID is based on the detection of ions formed during combustion of organic compounds in a hydrogen flame. The generation of these ions is proportional to the concentration of organic species in the sample gas stream. To detect these ions, two electrodes are used to provide a potential difference. The positive electrode acts ...
Major manufacturers of IMS screening devices used in airports are Morpho and Smiths Detection. Smiths purchased Morpho Detection in 2017 and subsequently had to legally divest ownership of the Trace side of the business (Smiths have Trace Products) [4] which was sold on to Rapiscan Systems in mid 2017. The products are listed under ETD Itemisers.
A chromatography detector is a device that detects and quantifies separated compounds as they elute from the chromatographic column.These detectors are integral to various chromatographic techniques, such as gas chromatography, [1] liquid chromatography, and high-performance liquid chromatography, [2] and supercritical fluid chromatography [3] among others.