High-performance liquid chromatography adsorbant used

The value of for calcium hydroxyapatite can be defined by charge of Ca + and PO ions. From this point of view calcium hydroxyapatite can be used as high-selective adsorbents for high performance liquid chromatography because with increasing of will be rise a selectivity coefficient a. 

The following table provides information on the properties and applications of some of the more specialized bonded, adsorbed, and polymeric phases used in modem high-performance liquid chromatography. In many cases, the phases are not commercially available refer to the appropriate literature citation for details on the synthesis. 

Kawasaki, T., Kobayashi, W., Ikeda, K., Takahashi, S., and Monma, H., High-performance liquid chromatography using spherical aggregates of hydroxyapatite micro-crystals as adsorbent, Eur. J. Biochem., 157, 291, 1986. 

The following table contains the common solvents used in thin-layer chromatography, with a measure of their strengths on silica gel and alumina. The solvent strength parameter, s°, is defined as the relative energy of adsorption per unit area of standard adsorbent.13 It is defined as zero on alumina when pentane is used as the solvent. This series is what was called the eluotropic series in the older literature. For convenience, the solvent viscosity is also provided. Note that the viscosity is tabulated in cP for the convenience of most users. This is equivalent to mPasec in the SI convention. Additional data on these solvents may be found in the tables on high-performance liquid chromatography. 

Zhou, Q., J. Xiao, and W. Wang. 2006. Using multi-walled carbon nanotubes as solid phase extraction adsorbents to determine dichlorodiphenyltrichloroethane and its metabolites at trace level in water samples by high performance liquid chromatography with UV detection. J. Chromatogr. A 1125 152-158. 

J. Kfiz, E. Adamcovd, J. H. Knox, and J. Hora, Characterization of adsorbents by high-performance liquid chromatography using aromatic hydrocarbons porous graphite and its comparison with silica gel, alumina, octadecylsilica and phenyl-silica, /. Chromatogr. A 663 (1994), 151-161. 

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