Comparison of adsorption coefficient (koc) for soils and hplc retention factors of aromatic hydrocarbons using a chemically immobilized humic acid column in rp-hplc

Gy Szab; Robert Bulman

doi:10.1080/10826079408013399

Comparison of adsorption coefficient (ko_c) for soils and hplc retention factors of aromatic hydrocarbons using a chemically immobilized humic acid column in rp-hplc

Gy Szab, Robert Bulman

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22 Citations (Scopus)

Abstract

The determination of soil adsorption coefficients (Km) via HPLC capacity factors (le) has been studied, including the effect of column type and mobile phase composition on the correlation between log K^_c and log k'. K_oc values obtained by procedures other than HPLC correlate well with HPLC capacity factors determined on a chemically immobilized humic acid stationary phase, and it is suggested that this phase is a better model for the sorption onto soil or sediment than the octadecyl-, phenyl- and ethylsilica phases. By using log k_w a theoretical capacity factor has been obtained by extrapolation of the retention data in a binary solvent system to pure aqueous eluent. There is a better correlation between log kqcand log k'_w than the correlation between log K_oc and log k.

Original language	English
Pages (from-to)	2593-2604
Number of pages	12
Journal	Journal of Liquid Chromatography
Volume	17
Issue number	12
DOIs	https://doi.org/10.1080/10826079408013399
Publication status	Published - 1 Jul 1994

Bibliographical note

Funding Information:
Gy. Szab6 was supported by an International Atomic Energy Agency training fellowship which was held at the National Radiological Protection Board. Part of this work was supported by Bio-Separation Co., Budapest, Hungary.

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10.1080/10826079408013399

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title = "Comparison of adsorption coefficient (koc) for soils and hplc retention factors of aromatic hydrocarbons using a chemically immobilized humic acid column in rp-hplc",

abstract = "The determination of soil adsorption coefficients (Km) via HPLC capacity factors (le) has been studied, including the effect of column type and mobile phase composition on the correlation between log K^c and log k'. Koc values obtained by procedures other than HPLC correlate well with HPLC capacity factors determined on a chemically immobilized humic acid stationary phase, and it is suggested that this phase is a better model for the sorption onto soil or sediment than the octadecyl-, phenyl- and ethylsilica phases. By using log kw a theoretical capacity factor has been obtained by extrapolation of the retention data in a binary solvent system to pure aqueous eluent. There is a better correlation between log kqcand log k'w than the correlation between log Koc and log k.",

author = "Gy Szab and Robert Bulman",

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AU - Szab, Gy

AU - Bulman, Robert

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N2 - The determination of soil adsorption coefficients (Km) via HPLC capacity factors (le) has been studied, including the effect of column type and mobile phase composition on the correlation between log K^c and log k'. Koc values obtained by procedures other than HPLC correlate well with HPLC capacity factors determined on a chemically immobilized humic acid stationary phase, and it is suggested that this phase is a better model for the sorption onto soil or sediment than the octadecyl-, phenyl- and ethylsilica phases. By using log kw a theoretical capacity factor has been obtained by extrapolation of the retention data in a binary solvent system to pure aqueous eluent. There is a better correlation between log kqcand log k'w than the correlation between log Koc and log k.

AB - The determination of soil adsorption coefficients (Km) via HPLC capacity factors (le) has been studied, including the effect of column type and mobile phase composition on the correlation between log K^c and log k'. Koc values obtained by procedures other than HPLC correlate well with HPLC capacity factors determined on a chemically immobilized humic acid stationary phase, and it is suggested that this phase is a better model for the sorption onto soil or sediment than the octadecyl-, phenyl- and ethylsilica phases. By using log kw a theoretical capacity factor has been obtained by extrapolation of the retention data in a binary solvent system to pure aqueous eluent. There is a better correlation between log kqcand log k'w than the correlation between log Koc and log k.

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Comparison of adsorption coefficient (ko_c) for soils and hplc retention factors of aromatic hydrocarbons using a chemically immobilized humic acid column in rp-hplc

Abstract

Bibliographical note

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