Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1216, Issue 44, Pages 7384-7387Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2009.05.028
Keywords
Monolithic silica column; Porosity; Poly(acrylic acid); Kinetic plot
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Monolithic silica columns in semi-micro-format have been synthesized using poly(acrylic acid) as a phase-separation inducer Via a Sol-gel route. The absence of a thick skin layer accompanied by deformation of the micrometer-sized gelling skeletons on the outermost part of the macroporous silica rod contributed to improve the efficiency of monolithic silica columns as thick as 2.4 mm in diameter The kinetic plot analysis revealed that monolithic silica columns with macropore diameter of 1 mu m and skeleton thickness of 1 mu m with decreased macroporosity behave similarly to columns packed with 3 mu m particles with slightly lower back pressure. (C) 2009 Elsevier B V. All rights reserved.
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