Journal of Industrial and Engineering Chemistry, Vol.11, No.6, 952-956, November, 2005
Nonlinear Adsorption Isotherms of Benzene and Some Nitrogen-containing Heterocycles
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The adsorption isotherms of benzene and nitrogen-containing compounds with aqueous/organic eluent were investigated in this study. The Langmuir isotherm was applied to describe the chromatographic retention of substances on the surface of the graphitized adsorbent. The exponential curves of benzene, imidazole, indole, and indoline increased logarithmically in aqueous solution, but 1,2,4-triazole displayed a linear adsorption isotherm. The adsorption isotherm were compared for different mobile phase compositions. The parameters a and b of the Langmuir isotherm decreased when using an acetonitrile-modified mobile phase. According to the experimental results, the chromatographic retention profiles of the investigated substances when using aqueous/organic eluent solutions can be determined by the interactions between the sorbates and eluent and their relative polarities. Thus, the retention times of the nonpolar compounds on the column increased after adding acetonitrile into the mobile phase.
Keywords:nonlinear adsorption isotherm;nitrogen-containing heterocycle;Langmuir isotherm;chromatographic retention
- Georges G, Golshan-Shirazi S, Katti AM, Fundamentals of Preparative and Nonlinear Chromatography, Academic Press, Boston, MA (1994)
- Georges G, J. Chromatogr. A, 965, 129 (2002)
- Fabrice G, Georges G, J. Chromatogr. A, 1008, 23 (2003)
- Lin B, Georges G, Modeling for Preparative Chromatography, Elsevier, Amsterdam (2003)
- Gritti F, Guiochon G, J. Colloid Interface Sci., 264(1), 43 (2003)
- Fabrice G, Georges G, J. Chromatogr. A, 1028, 75 (2004)
- Andreas SM, J. Chromatogr. A, 1037, 255 (2004)
- Nicoud RM, Andreas SM, Isolat. Purif., 2, 165 (1996)
- Horvath C, Ed., High Performance Liquid Chromatography, Advances and perspectives, Academic Press, New York, USA (1980)
- Chan F, Yeung LS, LoBrutto R, Kazakevich YV, J. Chromatogr. A, 1082, 158 (2005)
- Row KH, J. Chromatogr. A, 797, 23 (1998)
- Kleeman A, Engel J, Kutscher B, Reichert D, Pharmaceutical Substances, 3rd ed., Stuttgart; New York, USA (1999)
- Hong SC, Kim MS, Chung JG, J. Ind. Eng. Chem., 8(4), 305 (2002)
- Kim JH, Jeong YO, Pendleton P, J. Ind. Eng. Chem., 10(6), 1025 (2004)
- Kim TY, Kim SJ, Cho SY, J. Ind. Eng. Chem., 10(2), 188 (2004)
- Chu GY, Kim TY, Cho SY, Kang Y, Kim SD, Kim SJ, J. Ind. Eng. Chem., 10(4), 551 (2004)
- Kaczmarski K, Anto D, Sajonz H, Sajonz P, Guiochon G, J. Chromatogr. A, 925, 1 (2001)
- Jin LM, Han SK, Choi DK, Row KH, Korean Chem. Eng. Res., 43(2), 230 (2005)
- Miyazaki A, Hiyagon H, Sugiura N, Hirose K, Takahashi E, Geochim. Cosmochim. Acta, 68, 387 (2004)
- Grimmett M, Meth-Cohn O, Katritzky A, Imidazole and Benzimidazole Synthesis (Best Synthetic Methods), Academic press, Gainesville, USA (1997)