So far, more than 230 peer reviewed papers have been published on the application of DryLab – a complete list of which you can find here.

DryLab draws on the philosophy described in the three most famous Solvophobic Theory papers IIIIII of Csaba Horváth, which were developed in the years 1975-1977 at Yale University (see also literature by Dr. Imre Molnár).

Read more about the Fundamentals of DryLab and its History.

Keyword Year

Computer Simulation in HPLC Method Development. Reducing the Error of Predicted Retention Times

L. R. Snyder, M. A. Quarry
Journal of Liquid Chromatography, 10, 8-9, 1789-1820 (1987), DOI:10.1080/01483918708066799

Computer simulation uses two experimental HPLC runs to allow prediction of sample retention as a function of mobile phase composition or gradient conditions. The general approach is rigorous, but it is assumed that reversed-phase retention obeys the relationship log k' = log kw - S 0. Small deviations in this relationship can lead to error in predicted retention times. We have studied this error empirically for several different reversed-phase systems. This provides a basis for partially correcting these errors, and suggests recommendations for avoiding significant errors during computer simulation.Further work on improving the accuracy of DryLab I and DryLab G predictions, verification of this approach. 

Predicting bandwidth in the high-performance liquid chromatographic separation of large biomolecules : I. Size-exclusion studies and the role of solute stokes diameter versus particle pore diameter

B.F.D. Ghrist, M.A. Stadalius, L.R. Snyder
J. Chromatogr. A, 387, 1–19 (1987), DOI: 10.1016/S0021-9673(01)94510-8

Column plate numbers, N, were measured for 12 different proteins as a function of mobile phase flow-rate in two gel filtration systems (either denaturing or non-denaturing conditions). These data were used to extend a previous model that predicts bandwidths in reversed-phase and ion-exchange chromatography. Restriction of diffusion of large molecules within column packing pores is now defined more precisely, with a single relationship describing this effect for both reversed-phase and size-exclusion chromatography (SEC) (and presumably other high-performance liquid chromatography systems). Separations by gel filtration (SEC) are now included in our general model. A total of 17 flow-rate studies were carried out, involving different proteins, columns and/or mobile phase conditions (denaturing or non-denaturing). Comparisons of plate numbers predicted by the model with experimental values were satisfactory in 15 out of 17 cases. The remaining two cases appear to represent "non-well-behaved" systems, where experimental bandwidths were higher than predicted values by more than 20%. Initial attempts at understanding the origin of these non-ideal effects are described.

HPLC Computer Simulation. Optimizing Column Conditions

L.R Snyder, J.W Dolan
Am. Lab., 18, 8, 37 (1986)

First description of DryLab 1 (the ancestor of the column optimization portion of the present DryLab for Windows) as applied to a steroid sample.

Fast Method Development for Reversed-Phase HPLC. The Use of Computer Simulations

L.R. Snyder, J.W. Dolan, M.P. RigneyL.R. Snyder, J.W. Dolan, M.P. Rigney
LC·GC, 4, 921 (1986)

First description of DryLab 4-5 (the ancestor of the binary isocratic reversed phase module of DryLab for Windows) as applied to a mixture of nitro-aromatic compounds.

Separation of peptide mixtures by reversed-phase gradient elution. Use of flow rate changes for controlling band spacing and improving resolution

J.L. Glajch, M.A. Quarry, J F. Vasta, L.R. Snyder
Anal Chem., 58, 2, 280–285 (1986), DOI: 10.1021/ac00293a004

A general model has recently been proposed for the separation of peptides and proteins using reverse-phase gradient elution liquid chromatography. One application of this model suggests that flow rate, gradient time, or column configuration can be varied for band spacing control in the separation of enzymatic digests of proteins. Here a systematic procedure is described that uses repeated separations with different flow rates to maximize the separation of individual peaks within the chromatogram. From these initial separations it is possible to choose an optimum flow rate for the separation of a given sample. It is important in this approach to identify which bands in the various separations correspond to the same peptide. Various peak-tracking procedures are discussed and illustrated.

HPLC Separation of Large Molecules. A General Model.

L.R. Snyder, M.A. Stadalius
High-Performance Liquid Chromatography. Advances and Perspectives (Vol. 4), in: Csaba Horváth (ed.), Academic Press, New York, 195, (1986)

Summary of the basic model that underlies DryLab G applied to large molecules.

Selecting Column Conditions for Reversed-Phase HPLC Separation II. Column Configuration and Column Evaluation

L.R. Snyder, P.E. Antle
LC·GC, 3, 98 (1985)

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