Chromatography 2 Flashcards
1
Q
what if the dot doesnt move on chromatogram?
A
its insoluble in mobile phase -change the solvent to ethanol etc.
2
Q
solvent front?
A
the furthest point reached by solvent on chromatography
3
Q
if something is pure it won’t be separated by it
instead move as _________
mixture shud give______blobs
A
one blob give only one spot
multiple blobs
4
Q
How cud you use Rf value to identify a substance?
A
Compare Rf values of diff spots on chromatogram produced with refernce values to work out what dyes r present in ink
