IF YOUR SAMPLE IS A TRACE or
LIKE THIS
THIS
These accessories will multiply the range of your P-E Model 21 Spectrophotometer In air pollution studies, trace gas or liquid analyses, bio* medical micro-sampling... these Perkin-Elmer* accesso ries enable you to take full advantage of the remarkable range and sensitivity of your P-E Model 21 Spectropho tometer. In effect, they add—at moderate cost—a large factor of analytical capability. The P-E Long Path Cell in conjunction with the P-E Ordinate Scale Expansion System can increase the effec tive path length up to 800 meters, making it possible to detect gases in the parts per billion range! The P-E Ultra-Micro Sampling System gives a 6x energy concen tration of the infrared sample beam, permitting the anal ysis of samples weighing as little as O.l^gm in a KBr disc as small as 0.5mm in diameter. Perkin-Elmer has pioneered practically all present sampling accessories for infrared spectrophotometers. The accessories shown here represent the most recent additions to our accessory line. The range and convenience of the Model 21 may be still further extended with many other P-E sampling and recording attachments. We'll send you complete product data on aU of these. Also available: an informative tech nical paper, "Infrared Microsampling ΪΤΛ Bio-Medical Investigations," by W. B. Mason of the University of Rochester, and a reprint of a paper on ordinate scale expansion by Vincent J. Coates and Robert Anaereon of the Perkin-Elmer Corporation. Just write: Perkin-Elmer Corporation, 780 Main Avenue, Norwalk, Conn.
Ordinale Scale Expansion System-Increases measurement sensitivity of Model 2 1 , thereby providing a real gain in the ability t o perform trace analysis. Permits precise measurement of weak absorption bands or small absorption differences at any point i n the transmittance range.
Ultra-Micro KBr Sampling System—An all-reflecting optical system for con centrating the sample beam. Maintains high energy levels when analyzing ex tremely small samples. Price: $1,450. Ultra-Micro KBr Die for pressing 0.5 and 1.5mm KBr discs, $315.
AH prices it/b/ecf fo change without notice. *"P*rktn*f:lmet"
It a registered trademark of th Perkin-Elmer
I N S t R U M E N T
D I V I S I O N
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twin 40-meter Long Kith Cells-Effective path lengths from 4 to 40 meters. Pressure range: SO microns Hg to 100 psig. With scale expansion system of Model 2 1 , path length equivalent to 800 meters can be obtained. Prices $5,000.
