UNEXCELLED FLUORESCENCE, UNBEATABLE PRICE Nothing tops the sensitivity of lumi nescence spectroscopy for measuring pico-to-nanograms of amino acids, hormones, enzymes, nucleic acids, proteins or phenols. And with the Perkin-Elmer MPF-44A fluorescence spectrophotometer, you get the high performance sources at a price you can afford. The MPF-44A handles practically any research situation. It has a wavelength range from 200-1200 nm, resolution of 0.2 nm, and the sensitivity to detect picogram/ml concentrations of quinine sulfate. It's the newest addition to the line that made Perkin-
Elmer the acknowledged leader in fluorescence performance. Two new microprocessor-based accessories. One gives you corrected excitation and emission spectra. The other, the Differential Corrected Spectra Unit, adds differential (double-beam) operation without sacrificing sensitivity.
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A new ultra-micro flow cell acces sory with 20 μΙ sample capacity con verts the MPF-44A into an extremely sensitive, versatile LC detector. Other accessories let you select TLC, low temperature luminescence (phos phorescence), polarization, and solid sampling (front surface viewing). If you have any questions on a specific application for the MPF-44A, call us now at (203) 762-4379. Or for full details, write Perkin-Elmer Corp., Mail Station 12, Main Ave., Norwalk, CT 06856.
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PERKIN—ELMER
CIRCLE 167 O N READER SERVICE CARD
RECIPROCATING SHAKERS Eberbach continuous duty laboratory shakers are designed for the exacting requirements of research and for general purpose shaking. A wide range of available carriers adds to their ver satility. They are sturdy machines providing a maximum of reliability. Speeds are variable and are not affec ted by normal line voltage fluctuations or loading within specified limits. Cat. 5850-speed 20-240, adjustable stroke, 11% χ 12 χ 91/2". For 115v, 50/60 Hz, Power Unit Only . . $465.00 Cat. 5900-speed 60-240, adjustable stroke, 39 χ 20 χ 10". For 115v 60 Hz, Power Unit Only $806.00 Cat. 6000-speed 60-260, fixed stroke, 24V2 χ 131/2 χ 10". For 115v, 60 Hz Power Unit Only $550.00 One and T w o speed shakers also available.
Berbach
P.O. BOX 1024
CORPORATION ANN
ARBOR, MICHIGAN 48106 See us at FASEB Booth No. M-24 & 2 5 .
CIRCLE 67 O N READER SERVICE CARD 340 A · ANALYTICAL CHEMISTRY, VOL. 49, NO. 3, MARCH
1977
