The Pace-Setter: The Perkin-Elmer R12A NMR Spectrometer. The R12A is well-known as a reliable, easy-to-use spectrometer. Innovations in its design have made it the most advanced instrument in its market. The R12A is: First to provide a permanent magnet system, fully thermostatted so that the stability of field and of resolution are guaranteed. The magnet stability permits long periods of operation without adjustment—vital for t i m e - a v e r a g i n g w o r k , fast t h r o u g h p u t of service work, or classroom experiments.
First to provide the convenient and accurate Flowchart® recording system for fast, pre-aligned, errorfree results. First to provide an easy-to-use cross-coil spin decoupling system. The fully-calibrated decoupler allows top quality, noise-free decoupled spectra to be obtained quickly. First to provide a true "pushbutton" internal lock which allows operators to field lock immediately with differing samples without ad-
Circle No. 138 on Readers' Service Card
34 A · ANALYTICAL CHEMISTRY, VOL. 42, NO. 14, DECEMBER 1970
justing parameters. First to provide a switch-on fluorine accessory which requires no circuit tuning or unit replacement. For full details, write to Instrument Division, Perkin-Elmer Corporation, 702 Main Avenue, Norwalk, Conn. 06852.
PERKIN-ELMER
