Evaluation of behaviour of linear monoamines CH3-(CH2)n−1-NH2 (n=1-6) in ion chromatography |
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Authors: | Francesco Crea Concetta De Stefano |
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Institution: | Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Università degli Studi di Messina, Salita Sperone 31, Vill. S. Agata, I-98166 Messina, Italy |
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Abstract: | This paper reports the results on a study of ion chromatography (IC) behaviour on strong cationic exchange column of CH3-(CH2)n−1-NH2 (n=1-6) type linear monoamines. The eluents were mixtures of HCl-NaCl, HNO3-NaNO3, HClO4-NaClO4, H2SO4-Na2SO4, HClO4-NaClO4-CH3CN. Amines were revealed with an amperometric detector. The influence of different counter-ions on retention factors, k′, is discussed. Relationships between k′ and pE (E=sum of Na+ and H+ concentrations), and length of alkylic chain, and sensitivity coefficient S, are reported and discussed. The addition of acetonitrile (ACN) in the eluent was also taken into account. Suitable considerations are derived from these data. An example of monoamines separation is given. |
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Keywords: | IC monoamines separation Amperometric detection Strong cation exchange resin Anion influence on retention factors |
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