SPEEDVAC-A FASTER, MORE EFFICIENT WAY TO CONCENTRATE HPLC FRACTIONS. SpeedVac™ combines centrif Ligation, vacuum and controlled heat to evaporate HPLC and FPLC solvents. It gently deposits 100% of the solute as a compact pellet at the bottom of the tube. • Faster than freeze-drying, nitrogen blowdown or rotary evaporation • 100% sample recovery • Dries hundreds of fractions simultaneously • Concentrates pooled fractions to 250 ml. volume. • Uniform—all fractions processed identically • No degradation of labile samples Get full information on how a Savant SpeedVac™ concentrator/evaporator can add speed and efficiency to sample preparations. Call or write: Toll-free: 1-800-6348886 or (516) 249-4600 Savant Instruments, Inc. 110-103 Bi-County Blvd. Farmingdale, NY 11735
SAVANT For Sample Preparation. CIRCLE 150 ON READER SERVICE CARD
ELCD USERS - ATTENTION! To keep pace with Electrolytic Conductivity Detector (ELCD) technology, consider the newest design by O.I. Corporation's senior chemist, Dr. Randall Hall. Dr. Hall invented the first ELCD (which bears his name) in 1973, then in 1984, the O.I. Model 4420. After starting with patented new concepts in the 4420 cell and reactor design, he has continued to improve sensitivity, peak shape, and reliability with an intensive research program. The 4420 has been specifically engineered to interface with all major GC's. It can be installed in less than 30 minutes with proper fit assured. Capillary performance is unmatched, as is sensitivity. Your chromatography will never be limited by this detector, even in the most demanding applications involving detection of halogens, nitrogen, or sulfur. Get the benefit of state-of-the-art performance, continued development of new technology, and direct contact with the world's foremost expert on electrolytic conductivity detection. To find out how we can improve your results with our Model 4420, write or call for information today.
O•I•CORPORATION Graham Rd. at Wellborn Rd. · P.O. Box 2980 · College Station, Texas 77841-2980 Telephone (409) 690-1711 CIRCLE 120 ON READER SERVICE CARD ANALYTICAL CHEMISTRY, VOL. 59, NO. 2 1 , NOVEMBER 1, 1987 · 1265 A
