Retention behavior

Retention Behavior. On a chromatogram the distance on the time axis from the point of sample injection to the peak of an eluted component is called the uncorrected retention time The corresponding retention volume is the product of retention time and flow rate, expressed as volume of mobile phase per unit time ... 

This column exhibits a retention behavior for PMMA in toluene that is very similar to column No. 4, it is as if they contained identical column packings... 

It is likely that small molecules such as short oligopeptides have almost equal access to the hydrocarbonaceous sublayer at the surface of the bonded phases and thus their retention behavior is not affected significantly by the size of the hydrophilic polyether moieties. 

It is interesting that the retention behavior of lycopene varies dramatically depending on the stationary phase synthesis lycopene usually elutes before a- and P-carotene in monomeric columns, whereas with polymeric C30 columns, lycopene elutes after these carotenes. ... 

Vrakas, D., Giaginis, C., Tsantili-Kakoulidou, A. Different retention behavior of structurally diverse basic and neutral drugs in immobilized artificial membrane and reversed-phase high performance liquid chromatography ... 

Yamamoto, S. and Miyagawa, E., Retention behavior of very large biomolecules in ion-exchange chromatography,. Chromatogr. A, 852, 25, 1999. 

Lochmiiller, C. H., Hsu, S.-H., and Reese, C., Prediction of the retention behavior of ionizable compounds in reversed-phase LC using factor-analytical modeling, /. Chromatogr. Sci., 34, 77, 1996. 

Wan, Q.- H., Davies, M. C., Shaw, P. N., and Barrett, D. A., Retention behavior of ionizable isomers in reversed-phase liquid chromatography a comparative study of porous graphitic carbon and octadecyl bonded silica, Anal. Chem., 68, 437, 1996. 

Stefansson, M. and Westerlund, D., Ion-pair LC of carbohydrates at alkaline pH. Separation and retention behavior of glycoconjugates, Chromatographia, 35, 55, 1993. 

Hajos, P., and Nagy, L., Retention behaviors and separation of carboxylic acids by ion-exchange chromatography, /. Chromatogr. B, 717, 27, 1998. 

Zhang, M., Yang, C., and Ziad, E. R., Capillary electrochromatography with novel stationary phases. 3. Retention behavior of small and large nucleic acids on octadecyl-sulfonated-silica, Anal. Chem., 71, 3277, 1999. 

Hill, R.E., Retention behavior of a bonded reversed phase in high performance liquid chromatographic assay of serum theophylline, J. Chromatogr., 135,419,1977. 

This study investigates the retention behavior of dilute polymer solutions in oil sands. Results indicate that the presence of a large amount of fines and/or a variety of minerals in the sand may result in high adsorption and retention causing excessive loss of polymer and high injection pressures. Injection of a surfactant with the polymer leads to increased oil recoveries because the dilute polymer may selectively adsorb on mineral grain surfaces leaving the surfactant to act at liquid/iiquid contacts. 

KIKANI AND SOMERTON Retention Behavior of Dilute Polymers... 

Solvatochromic probes have been used for a variety of applications like the study polarity of pure and mixed solvents [99], and the retention behavior in reverse-phase liquid chromatography [100] among other applications. Frechet et al. used 4-(N-methylamino)-l-nitrobenzene (p-MANB), as the chromophore, to probe the microenvironment of polyaromatic ether based dendrimers [101]. 

Aleksic et al. [47] estimated the hydrophobicity of miconazole and other antimycotic drugs by a planar chromatographic method. The retention behavior of the drugs have been determined by TLC by using the binary mobile phases acetone-n-hexane, methanol toluene, and methyl ethyl ketone toluene containing different amounts of organic modifier. Hydrophobicity was established from the linear relationships between the solute RM values and the concentration of organic modifier. Calculated values of RMO and CO were considered for application in quantitative structure activity relationship studies of the antimycotics. 

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