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Retention Equations of Nonionic Organic Chemicals in Soil Column Chromatography with Methanol–Water Eluents

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 161 Zhongshan Road, Dalian 116011, China

View larger version (16K): [in a new window]   Fig. 1. Relationship between the k'w values extrapolated from the log-linear equation (Eq. [1]) and the k'w(direct) values directly measured in a water eluent on an unpreconditioned GSE 17204 soil column at 30°C.

View larger version (13K): [in a new window]   Fig. 2. Relationship between the predicted k' values by the linear solvation energy relationships (LSER) model and the experimentally measured k' values. Column: GSE 17204 soil; eluent: = 0.50 methanol–water mixture; flow rate: 1 mL min-1; temperature: 30°C.

View larger version (28K): [in a new window]   Fig. 3. Fits of the capacity factors (k') vs. methanol volume fractions () according to Eq. [1] in 30°C methanol–water mixed eluents over (A) GSE 17204 soil and (B) GSE 17205 soil.