This advanced instrument gives more usable information ...faster...than any other infrared instrument or method You'll f i n d Perkin-Elmer's new Model 221-G Prism/Grating Spectrophotometer unequalled in accuracy, speed, convenience, reliability.
Whether your laboratory is responsible for identifying unknowns, delineating structures, making quantitative determinations — whether checking the progress of syntheses or performing quality control-the Model 221-G lets you do the job with unsurpassed speed and accuracy. Work with the Model 221-G will give you continuing assurance you have purchased the finest infrared instrument available... with an unmatched combination of features :
automatic gain control—for accurate measurements in regions of reference beam solvent absorption programmed scanning and speed suppression—essential to accuracy at high scanning speeds high resolution throughout range—with
largest choice of prism interchanges, plus the unique Coates prism-grating interchange unbroken spectral data presentation —
continuous spectrum over entire range I N S T R U M E N T
selected, without gaps or overlaps. wide wavelength range—unlimited freedom to work from .5 to 40 microns In addition, you have available the widest range of sampling accessories; P-E's Applications Engineering backup; fast, expert service. Complete details have appeared in recent issues of P-E's quarterly INSTRUMENT NEWS. For your copies of these articles, write us at 780 Main Avenue, Norwalk, Connecticut. D I V I S I O N
Perkin-Elmer N O R W A L K ,
This spectrum of Indene, 9 9 % pure, was run on the standard NaCI prism infrared spectrophotometer. The thickness of the sampling cell was .025 mm. Spectral presentation is linear in wavenumbers.
Corporation
C O N N E C T I C U T
Linear wavenumber spectrum of the same sample, same cell thickness, run on a new Perkin-Elmer Model 221-G prism/grating spectrophotometer. Note improvement in resolution over that obtained in other run.
