Explore BrainMass
Share

Explore BrainMass

    GC Problem

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    Calculate:
    1. Corrected retention times for air and 3 alcohols
    2. Specific retention volumes for 3 alcohols
    3. Distribution constant for 3 alcohols
    4. Capacity factor for 3 alcohols
    5. The average number of theoretical plates and the average height of a theoretical plate for the column

    Given:
    1. Column length: 1.1m ID = 2mm
    2. Weight of stationary phase = 1.4g /density = 1.02g/ml
    3. Average volumetric flow in column = 30.2ml/min
    4. Inlet pressure = 26.1psi above ambient press
    5. Room temperature = 21.2C column temp = 102C

    RETENTION TIMES:
    air = 0.3 min
    propanol = 2 min
    butanol = 4.2 min
    hexanol = 8 min

    PEAK WIDTHS:
    propanol = 0.2min
    butanol = 0.4 min
    hexanol = 0.8min.

    © BrainMass Inc. brainmass.com October 9, 2019, 3:55 pm ad1c9bdddf
    https://brainmass.com/chemistry/experimental-design-and-methods-in-chemistry/retention-times-17441

    Solution Preview

    Retention times are corrected for the amount of time needed for a nonadsorbent analyte to be detected, in this case air. All retention times need to be corrected by subtracting 0.3 minutes.

    air = 0 min
    propanol = 1.7 min
    butanol = 3.9 min
    hexanol = 7.7 minutes.

    The ...

    Solution Summary

    The solution calculates the corrected retention times and volumes

    $2.19