Solvent composition effects in the chromatography of aromatic nitro-compounds on thin layers of alumina.
The relationship between the R(M)-value and the concentration of the polar solvent in the mobile phase was investigated for a number of nitro-derivatives of benzene, naphthalene and biphenyl. In accordance with a molecular model of adsorption, linear R(M)vs. log X(S) plots were obtained (X(S) is the mole fraction of the polar solvent). The effect of the number of nitro-groups and their position in the aromatic ring on adsorption was investigated.
Wawrzynowicz
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Department of Inorganic and Analytical Chemistry, Institute of Basic Chemical Sciences of the Medical Academy, 20-081 Lublin, Poland.
Dzido
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