Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1391, Issue -, Pages 49-59Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2015.02.069
Keywords
High performance liquid chromatography; Normal phase liquid chromatography; Synthetic diamond; Physical characterisation of support; Microdispersed sintered detonation nanodiamond; Porous graphitic carbon
Funding
- Australian Research Council [DP110102046, DP150102608]
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The chromatographic properties of high pressure high temperature synthesised diamond (HPHT) are investigated in normal phase mode of high performance liquid chromatography. Purified nonporous irregular shape particles of average particles size 1.2 mu m and specific surface area 5.1 m(2) g(-1) were used for packing 100 x 4.6 mm ID or 50 x 4.6 mm ID stainless steel columns. The retention behaviour of several classes of compounds including alkyl benzenes, polyaromatic hydrocarbons (PAH), alkylphenylketones, phenols, aromatic acids and bases were studied using n-hexane-2-propanol mixtures as mobile phase. The results are compared with those observed for microdispersed sintered detonation nanodiamond (MSDN) and porous graphitic carbon (PGC). HPHT diamond revealed distinctive separation selectivity, which is orthogonal to that observed for porous graphitic carbon; while selectivities of HPHT diamond and microdispersed sintered detonation nanodiamonds are similar. Owing to non-porous particle nature, columns packed with high pressure high temperature diamond exhibited excellent mass transfer and produce separations with maximum column efficiency of 128,200 theoretical plates per meter. (C) 2015 Elsevier B.V. All rights reserved.
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