AMERICAN INSTRUMENT COMPANY - Analytical Chemistry (ACS

AMERICAN INSTRUMENT COMPANY. Anal. Chem. , 1976, 48 (6), pp 443A–443A. DOI: 10.1021/ac60370a701. Publication Date: May 1976. ACS Legacy ...
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Quanta corrected excitation spectrum ot quinine sulfate. Four consecutive scans of 1 ppm quinine sulfate were made without removing the pen from the paper. Note the correct ratio (5.17) of the 248nm peak to 348nm peak.

A Unique New Corrected Spectra Spectrofluorometer With True Double-Beam Compensation In this new AMINCO Corrected Spectra Spectrofluorom­ eter (SPF), a unique dual-detector system provides superior correction, accuracy and range. One detector, calibrated to a radiant fluxmeter, produces corrected excitation spectra, while the other detector, calibrated to a standard lamp, produces corrected emission spectra. A half-width cell (5mm) placed before the reference PM tube corrects for solvent absorption, sometimes a critical factor at short wavelengths. This design provides a cor­ rected wavelength range of 200 to 650 nm in the excita­ tion mode and 290 to 700 nm in the emission mode. This unique design concept also provides: • An instrument calibrated for extended periods of time without adjustment of calibration controls (there are only 5 potentiometers for excitation and 12 for emis­ sion). Π Quanta correction or energy correction of both excita­ tion and emission spectra without recalibration. Mode selection is made by a simple switch.

AMERICAN INSTRUMENT C O M P A N Y

Π Freedom from the problems of stray light interference, temperature sensitivity, and the use of ultra-pure chemicals. Π Direct transmittance measurements by a simple re­ positioning of the detector. This dual-detector system provides real-time (continuous) correction as opposed to time-shared (chopped signal) correction. A real-time system is preferred in applica­ tions which necessitate the use of a chopped signal, such as phosphorimetry; it is mandatory for compounds having short fluorescence or phosphorescence lifetimes. The new AMINCO Corrected Spectra SPF system may be retrofit to most AMINCO-BOWMAN™ SPF's. For more information, and/or a demonstration, contact

AMINCO

DIVISION OF TRAVENOL LABORATORIES, INC.,

Silver Spring, Maryland 20910

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ANALYTICAL CHEMISTRY, VOL. 48, NO. 6, MAY 1976 · 443 A