BETTER
THAN SILICA Silica is good. But for tough H P L C methods devel opment, Hamilton's PRP-1 reversed phase column is better. First, the exceptionally stable, polymer-based PRP-1 accepts virtually any mobile phase with a p H between 1 and 13, giving you greater flexibility over your chromato graphic conditions. Second, the PRP-1 lets you separate most compounds with no need for ion-pairing reagents. But even if ion-
pairing reagents are required, column degradation is minimized. Third, the fact that PRP-1 columns are polymer-based means the purified samples do not contain silica impuri ties which must subsequently be removed. Lastly, composition of the polymer-based particles is consistent from surface to center. No "new" type of sur face becomes exposed to cause the selectivity variations common to silica columns.
T h e PRP-1 is available in 5/i.m and ΙΟμ,πι analytical, and ΙΟμ,ιτι semi-preparative and preparative columns. So whether you need high speed and resolution, or run large-scale separations, there is a Hamilton PRP-1 column that can significantly improve performance of your H P L C . For complete information, call us toll-free at: (800) 648-5950, or (702) 786-7077. Hamilton Company, EO. Box 10030, Reno, Nevada 89520.
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