In a tradition of excellence The New 780 Infrareds

The introduction of the new 780 series of Ratio Recording IR Spectrometers maintains the Perkin-Elmer tradition of excel­lence. Medium in price, yet high in performance, this exciting new range of instruments brings the spectroscopist an unrivalled combination of accu­racy, flexibility and value for money. Precision and Sensitivity All three 780's use the latest microprocessor ratioing techniques which guarantee precision for quantitative analyses and the sensitivity needed for examining minute absorption bands from trace components. Noise on spectra can be mini­mised by taking advantage of the extra wide slit programs and in­tegrated digital filtering.

Baseline Correction To enable all kinds of samples to be run successfully the 780's

have four slit programs. Narrow for gases, medium for general solid and liquid samples and two wide programs for samples which transmit poorly or have small bands which need expanding. Stepped or sloping baselines associated with accessories and micro samples can be reduced by the built-in background cor­rector. Data from the accessory baseline is memorised and then used for correction when the sample is run.

Stored Methods A safe memory stores sets of scan parameters which may be recalled later to set up the instru­ment automatically - ideal for the unskilled operator. In addition, several sets of parameters may be recorded to run sequentially so only regions of interest need be recorded, saving both time and chart paper.

Comprehensive Readouts With the patented electronic flow­chart* recorder and automatic wavenumber corrector, calibra­

tion can be depended on under all possible scan conditions. Bright digital readouts continu­ously display sample absorbance or transmission as well as current wavenumber and scan limits. Computer Aided Chemistry

Θ Following the traditions set by all current r-i ι • ι -1

Perkin-Elmer in­strumentation, the 780

series is Data Station compatible * giving access to the ever ex­panding range of applications software. Currently available are PECDS II for general spectral handling, QUANT for single and multi component analysis and the new SEARCH II for unknown com­pound identification. * Flowchart is a trademark of Perkin-Elmer Limited

Perkin-Elmer Corp , Analytical Instruments, Main Ave (MS-12), Norwalk. CT 06856 U S A . Tel: (203) 762-6853. Perkin-Elmer Ltd , Post Office Lane, Beaconsfield, Bucks HP9 1QA, England Tel: Beaconsfield (049 46)6161 Bodenseewerk Perkin-Elmer & Co., GmbH, Postfach 1120, 7770 Ueberlingen. Federal Republic of Germany Tel: (07551 ) 811

PERKIN-ELMER Circle 174 for literature. Circle 175 for sales call.

382 A · ANALYTICAL CHEMISTRY, VOL. 55, NO. 3, MARCH 1983