some useful and practical tips for flash chromatography yoann coquerel february 14th 2008 original procedure w clark still joc 1978 43 2923 extensions jce 1984 61 645 jce1984 61 649 ...
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...Some useful and practical tips for flash chromatography yoann coquerel february th original procedure w clark still joc extensions jce selection of the eluent system arrange elution strength acoet petrol ether to place desired compound at r best evaluation f if less than is required switch polar solvent as et o or ch cl more thf aceton try meoh in once determined rf maximum reduce amount get difficult separation easy run mass silica gel times sample never a filtration density dry m used fc about height diameter ratio h d...