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Inst.f.Chromatography

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                       TLC and HPTLC

19 mob. phases table

mobile phases table

Figure 19 : Mobile phase table according to H. Halpaap -
E. MERCK In addition to the data in figure 19 here are the
“Halpaap polarity numbers” ordering the elution strength on silica layers . The “kappa value” describes the speed of phase penetration into a 0.2 mm thick layer (unit = square mm per second). The Halpaap numbers have been used in figure 19 .

  HPN  Kappa  mobile phase

  1    11.5   heptane 
  2    14.0   hexane 
  3    14.0   pentane  1
  4     6.5   cyclo hexane
  5    17.5   carbon disulfide
  6     7.0   carbon tetrachloride
  7    10.5   trichloroethylene 
  8     8.0   xylene
  9    11.0   toluene 
  10   10.5   benzene 
  11   11.5   chloroform
  12   13.0   dichloromethane 
  13   13.0   di iso propyl ether
  14    1.0   tert. butanol 
  15   15.5   diethyl ether
  16    1.5   Isobutyl Alcohol
  17    15.5   acetonitrile
  18     9.0   iso butyl methyl ketone
  19     2.5   propan-2-ol
  20    12.0   acetic acid ethyl ester
  21     3.0   propan-1-ol
  22    14.0   ethyl methyl ketone
  23    16.0   acetone
  24     4.0   ethanol
  25     6.5   dioxane
  26    12.5   tetrahydrofurane
  27     7.0   methanol
  28     8.0   pyridine

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