1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Paper Chromatography

  1. Mar 30, 2008 #1
    1. Why are some pigment spots larger (area and volume) than others?

    I understand that pigments move up the porous paper by capillary action, from research. But why are some pigment colours (areas) larger? THanks
  2. jcsd
  3. Mar 31, 2008 #2
    I'd think the area being larger would mostly imply more of the pigment was placed on the paper. I imagine a very small volume of difference between drops of two pigments would cause a still noticeable difference in the size of the spots.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook