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  2. Electrochemical gas sensor - Wikipedia

    en.wikipedia.org/wiki/Electrochemical_gas_sensor

    Sensors for carbon dioxide are an example of this approach and they have been commercially available for several years. Cross-sensitivity of electronic chemical sensors may also be utilized to design chemical sensor arrays , which utilize a variety of specific sensors that are cross-reactive for fingerprint detection of target gases in complex ...

  3. Nondispersive infrared sensor - Wikipedia

    en.wikipedia.org/wiki/Nondispersive_infrared_sensor

    A nondispersive infrared sensor (or NDIR sensor) is a simple spectroscopic sensor often used as a gas detector.It is non-dispersive in the fact that no dispersive element (e.g a prism or diffraction grating as is often present in other spectrometers) is used to separate out (like a monochromator) the broadband light into a narrow spectrum suitable for gas sensing.

  4. Electrochemical reduction of carbon dioxide - Wikipedia

    en.wikipedia.org/wiki/Electrochemical_reduction...

    The electrochemical reduction of carbon dioxide, also known as CO2RR, is the conversion of carbon dioxide (CO 2) to more reduced chemical species using electrical energy. It represents one potential step in the broad scheme of carbon capture and utilization .

  5. Photoionization detector - Wikipedia

    en.wikipedia.org/wiki/Photoionization_detector

    The photoionization detector is an efficient and inexpensive detector for many gas and vapor analytes. PIDs produce instantaneous readings, operate continuously, and are commonly used as detectors for gas chromatography or as hand-held portable instruments. Hand-held, battery-operated versions are widely used in military, industrial, and ...

  6. Supercritical fluid chromatography - Wikipedia

    en.wikipedia.org/wiki/Supercritical_fluid...

    Supercritical fluid chromatography (SFC) [1] is a form of normal phase chromatography that uses a supercritical fluid such as carbon dioxide as the mobile phase. [2] [3] It is used for the analysis and purification of low to moderate molecular weight, thermally labile molecules and can also be used for the separation of chiral compounds.

  7. Arsenic found in bottled water sold by Whole Foods and Walmart

    www.aol.com/news/arsenic-found-bottled-water...

    A recent study by the Center for Environmental Health has revealed high levels of arsenic in two brands of bottled water sold by Whole Foods and Walmart.

  8. Evaporative light scattering detector - Wikipedia

    en.wikipedia.org/wiki/Evaporative_light...

    An evaporative light scattering detector (ELSD) is a destructive chromatography detector, used in conjunction with high-performance liquid chromatography (HPLC), [1] ultra high-performance liquid chromatography (UHPLC), [2] purification liquid chromatography such as flash or preparative chromatography (using a splitter), countercurrent or ...

  9. Schools across U.S. seek to snuff out vaping

    www.aol.com/article/news/2019/09/11/schools...

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