L. R. Snyder L. R. Snyder was one of the early pioneers in the renaissance of liquid chromatography. He was educated at the University of California receiving his bachelor and doctorate degrees in 1952 and 1954 respectively. He spent 14 years in research at two different oil companies and then became vice president of the Clinical Chemistry Department at the Technicon Instrument Corporation. He has published over 150 papers in the areas of chromatography, petroleum analysis and clinical analysis. He has authored or co-authored a number of books in chromatography and has received numerous awards for his contributions to separation science. Like Kirkland, he was one of the first to establish the importance of small particles and high pressures to achieve high efficiencies from liquid chromatography packed columns. He has also been active in establishing basic concepts in liquid chromatography theory and the mechanism of retention. He is on the editorial board of a number of separation science journals

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Author: RPW Scott Book:Extra Column Dispersion
Section:EC-Dispersion   Rapid-Separations

mixture contains components that extend over a wide polarity or molecular weight range then gradient elution development will be necessary and fast gradients are almost impossible to form with conventional LC solvent programmers. As a consequence, for high speed gradient separations, a unique procedure must be used in conjunction with specially designed apparatus. The solution to the problem of fast gradient generation is to employ a preformed gradient a concept that was first introduced by Snyder and Saunders (13) as long ago as 1969. A diagram of a gradient preformer is shown in figure 27. In the particular apparatus that was used to provide the fast analyses that are described below the required gradient was formed in a column 25 cm long, 4.6 mm I.D. packed with glass beads 40 mm in diameter

EC-Dispersion   Rapid-Separations

Author: RPW Scott Book:Extra Column Dispersion
Section:EC-Dispersion   References

. Technol.,13(197)681. 6.E. D. Katz and R. P. W. Scott, J. Chromatogr., 268(1983)169. 7.M. J. E. Golay in Gas Chromatography 1958, (Ed. D. H. Desty) 8.R. Tijssen, Separ. Sci. Technol.,13(197)681 9.E. D. Katz and R. P. W. Scott, J. Chromatogr., 268(1983)169. 10.R. P. W. Scott and C. F. Simpson, J. Chromatogr. Sci., 20(1982)62. 11.J. G. Atwood and M. J. E. Golay, J. Chromatogr., 218(1981)97. 12.R.P.W.Scott, P.Kucera and M. Munroe, J. Chromatogr. 186(1979)475. 13.L.R.Snyder and D.I.Saunders,J. Chromatogr. Sci., 7(1969)195. 14.R. P. W. Scott and P. Kucera, J. Chromatogr.,185(1979)27.  

EC-Dispersion   References