Abstract
The chromatographic behaviour of thirty primary aliphatic amines on Dowex 50 X 4 (NA + and H +), sodium carboxymethylcellulose and Rexyn 102 (Na +) thin layers has been studied using HCl, buffer and salt solutions as eluents. Some interesting separations are reported; the affinity sequencies on these exchangers are compared with those observed in column chromatography. The retention mechanism has been investigated by applying the R M — log a HCl relationship and the activity coefficients in the “mobile phase” are calculated. The factors underlying the ion-exchange selectivity of these amines are discussed.
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