Temperature Control, Background a wide array of sample handling Model 57Series Spectrophotometer... 0.5 Spectra recorded at intervals of 2 . 5 X from 15-35*C.
0.4
0.3
02 \\ ΟΙ Ο Equilibrium between an iron porphyrin and imidazole as a function of temperature
are made every 0.4 nm or 0.1 nm with possibilities for scale expansion of the resulting spectra to 0.01 A full scale. Turbid samples can be placed in a second sample compartment adjacent to a large two-inch diameter photomultiplier to recollect any scattered light. Sensitive difference spectra from turbid samples demand background correction since unavoidable variations in cell pathlength and sample and reference solutions produce distorted baselines. Now compensate the baseline in the time it takes to scan the spectrum.
Automatic Sample Handling. Program up to five samples with their associated references into the beam with digital setting of cycle and dwell time. Each pair of cells is precisely positioned by a transport mechanism driven by a stepping motor which is also available in a manual version. Each channel can have individually selected zero suppression and scale expansion to optimize its recording conditions with a choice of bar or dot presentations. If the tear-off card has been used, for further information or a demonstration, contact: Instrument Division, Norwalk, CT 06856 USA Bodenseewerk Perkin-Elmer & Co., GmbH, 7770 Ueberlingen.W Germany CIRCLE 168 O N READER SERVICE CARD
...provides unsurpassed versatility!
PERKIN-ELMER
