Expand HPLC Column pH Range by 1 0 0 % inVirtually any Buffer Medium. If silica's 2-to-7.5 p H range limits your H P L C analyses, expand to Hamilton PRP-1 Reversed Phase Columns. The superior alternative to derivatized silicas. Hamilton PRP-1 can be operated over a l-to-13 p H range — more than double silica's. And PRP-1 functions in virtually any buf fer medium. With optimal efficiency—from 30,000 to 50,000 plates/meter; in both 15 cm and 25 cm column lengths. Plus, PRP-1 has a superior capacity for many applications. A non-swelling, rigid ΙΟμιη macroporous resin sphere, PRP-1 can selec tively adsorb both ionic and neutral solute species. N o need for guard columns. N o worry about damage to the packing.
The bottom line: maximal reproducible resolution and minimal cost. In fact, the extra ordinarily efficient 150mm χ 4.1mm PRP-l column (>30,000 theoretical plates/meter efficiency) is priced at an extraordinary #225, the 250mm column at #285. Learn more about Hamilton PRP-1. Call toll-free (800) 648-5950 for the dealer nearest you. Or write Hamilton Company, R O . Box 10030, Reno, N V 89510. Boost your H P L C selectivity. Get true resolving power, not silica limitations.
HAMILTON The measure ofexcellence. CIRCLE 98 ON READER SERVICE CARD 616 A · ANALYTICAL CHEMISTRY, VOL. 55, NO. 6, MAY 1983
