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  2. List of boiling and freezing information of solvents - Wikipedia

    en.wikipedia.org/wiki/List_of_boiling_and...

    Toggle the table of contents ... Download as PDF; Printable version; ... move to sidebar hide. Solvent Density (g cm-3) Boiling point (°C) K b (°C⋅kg/mol ...

  3. Kovats retention index - Wikipedia

    en.wikipedia.org/wiki/Kovats_retention_index

    In gas chromatography, the Kovats retention index (shorter Kovats index, retention index; plural retention indices) is used to convert retention times into system-independent constants. The index is named after the Hungarian-born Swiss chemist Ervin Kováts , who outlined the concept in the 1950s while performing research into the composition ...

  4. Resolution (chromatography) - Wikipedia

    en.wikipedia.org/wiki/Resolution_(chromatography)

    where t R is the retention time and w b is the peak width at baseline. The bigger the time-difference and/or the smaller the bandwidths, the better the resolution of the compounds. The bigger the time-difference and/or the smaller the bandwidths, the better the resolution of the compounds.

  5. Retardation factor - Wikipedia

    en.wikipedia.org/wiki/Retardation_factor

    An R F value will always be in the range 0 to 1; if the substance moves, it can only move in the direction of the solvent flow, and cannot move faster than the solvent. For example, if particular substance in an unknown mixture travels 2.5 cm and the solvent front travels 5.0 cm, the retardation factor would be 0.50.

  6. What should you set your heat to in the winter? Avoid ... - AOL

    www.aol.com/finance/set-heat-winter-avoid...

    What you should set your thermostat at in the winter. Turns out there's a magic number for your thermostat setting in the winter, experts say. That setting? 68 degrees, according to the Energy ...

  7. How a whole-person care model is transforming autoimmune ...

    www.aol.com/whole-person-care-model-transforming...

    Whole-person specialty care, a model where a comprehensive care team works together to coordinate personalized and individualized treatment, is offering renewed hope for patients.

  8. Judge to decide whether Trump's hush money conviction can stand

    www.aol.com/news/judge-decide-whether-trumps...

    A New York judge is set to decide this week whether President-elect Donald Trump's criminal conviction on charges involving hush money paid to a porn star should be overturned in light of the U.S ...

  9. Headspace gas chromatography for dissolved gas measurement

    en.wikipedia.org/wiki/Headspace_Gas...

    One of the most widely used methods for headspace analysis is described by the United States Environmental Protection Agency (USEPA). Originally developed by the R.S. Kerr USEPA Laboratory in Ada, Oklahoma as a "high quality, defendable, and documented way to measure" methane, ethane, and ethene, [7] [8] RSKSOP-175 is a standard operating procedure (SOP) and an unofficial method employed by ...