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. Author manuscript; available in PMC: 2012 Mar 11.
Published in final edited form as: J Chromatogr A. 2011 Jan 5;1218(10):1359–1366. doi: 10.1016/j.chroma.2010.12.114

Figure 4.

Figure 4

Plot of log k vs. number of methylene groups for nitroalkane homologs (nitropropane, nitrobutane, nitropentane and nitrohexane). (a) 2 μmolAl/SiO2: (▲) 32 %; (□) 8 % C; (b) 8 μmolAl/SiO2: (Δ) 25 %; (□) 21 %; (◇)14 % C; (○) C/ZrO2.; (*), 24 % C/Al2O3. LC conditions: F = 0.4 ml/min., T = 40 °C, 35/65 MeCN/water; all columns are 33 × 2.1 mm id. Error bars are not bigger than the markers in the plot.