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  2. High-performance liquid chromatography - Wikipedia

    en.wikipedia.org/wiki/High-performance_liquid...

    HPLC has many applications in both laboratory and clinical science. It is a common technique used in pharmaceutical development, as it is a dependable way to obtain and ensure product purity. [59] While HPLC can produce extremely high quality (pure) products, it is not always the primary method used in the production of bulk drug materials. [60]

  3. Ultrapure water - Wikipedia

    en.wikipedia.org/wiki/Ultrapure_water

    Ultrapure water (UPW), high-purity water or highly purified water (HPW) is water that has been purified to uncommonly stringent specifications. Ultrapure water is a term commonly used in manufacturing to emphasize the fact that the water is treated to the highest levels of purity for all contaminant types, including: organic and inorganic compounds; dissolved and particulate matter; volatile ...

  4. Reagent Chemicals - Wikipedia

    en.wikipedia.org/wiki/Reagent_Chemicals

    In addition to specifications for each chemical, Reagent Chemicals provides detailed methods for determining how to measure the properties and impurities listed in the specifications. Included are detailed explanations for numerous common analytical methods such as gas , liquid , ion , and headspace chromatography , atomic absorption ...

  5. Micellar liquid chromatography - Wikipedia

    en.wikipedia.org/wiki/Micellar_liquid_chromatography

    In HPLC, the capacity factor represents the molar ratio of the solute in the stationary phase to the mobile phase. The capacity factor is easily measure based on retention times of the compound and any unretained compound. The equation rewritten by Guermouche et al. [9] is presented here: 1/k¢ = [n • (KMW-1)/(f • KSW)] • CM +1/(f • KSW ...

  6. High-performance thin-layer chromatography - Wikipedia

    en.wikipedia.org/wiki/High-performance_thin...

    The spot capacity (analogous to peak capacity in HPLC) can be increased by developing the plate with two different solvents, using two-dimensional chromatography. [8] The procedure begins with development of a sample loaded plate with first solvent. After removing it, the plate is rotated 90° and developed with a second solvent.

  7. Russia appears to be packing up its helicopters and air ... - AOL

    www.aol.com/russia-looks-packing-helicopters-air...

    In new satellite imagery, Russia's military appears to be packing up equipment at a key airbase in Syria. The images show transport aircraft ready to load cargo at the Hmeimim Air Base on Friday.

  8. Sean 'Diddy' Combs accuser speaks out for first time: 'I felt ...

    www.aol.com/news/sean-diddy-combs-accuser-speaks...

    An accuser in the sprawling case against Sean "Diddy" Combs is speaking out publicly for the first time.. The man, known only as John Doe, opted to remain anonymous and spoke to CNN from a ...

  9. Liquid chromatography–mass spectrometry - Wikipedia

    en.wikipedia.org/wiki/Liquid_chromatography...

    The interface between a liquid phase technique (HPLC) with a continuously flowing eluate, and a gas phase technique carried out in a vacuum was difficult for a long time. The advent of electrospray ionization changed this. Currently, the most common LC–MS interfaces are electrospray ionization (ESI), atmospheric pressure chemical ionization ...