When you evaluate the Aminco-Bowman SPF*
Consider The SPF's ability to show superior sensitivity and high resolution simultaneously is shown in the curve. See data block for details.
SENSITIVITY
Part Per Trillion Sensitivity: Limits of detection are now better than I part per trillion for quinine sulfate when excited at 250 nm or 350 nm (both sensitivities measured utilizing a proposed ASTM committee test). In another sensitivity test (also proposed by ASTM) the level of cyclohexane in carbon tetrachloride is measured by the Raman line. In this case the SPF measures better than 30 ppth at 313 nm with an I I nm bandpass.
R E S O L U T I O N
Less than 1 nm: Adjustable monochomator mirrors focus at the defin ing slit of each monochromator, giving each a resolution of 0.65 nm. When 0.1 mm slits are used, the overall resolution is less than 1 nm, while sensitivity remains high.
STAB I LIT
Α
Υ
standard deviation of less than 0.28 from a reading of 87.3 for 16 consecutive spectral scans of 0.1 ppm anthracene. Achieved through the use of a custom power supply, selected lamps, highest precision photometer and a cell compartment designed to permit temperature control of the sample—all standard components of the Aminco-Bowman SPF.
V E R S A T I L I T Y
Accessories are available which extend the capabilities of the AmincoBowman SPF beyond any competitive fluorescence instrument. Among these is the Corrected Spectra Attachment, which is used to obtain energy-corrected excitation and emission spectra. This accessory fully compensates for the spectral dependence of light sources, mirrors, monochromators and photomultiplier tubes. A large and versatile sample compartment permits polarization, kinetic, and solid-sample studies, and thin-layer chromatogram scans.
•Spectrophotoftuorometer At the Forefront of Spectrofluorescence Technology from its Inception
Send for new Fluorescence Instrumentation Catalog which describes the Aminco-Bowman SPF, Fuoro-Microphotometer, SPF-125 and SPF 1000. One of these instruments is ideally suited to your fluorescence application. Request Catalog 2425AC3.
AMERICAN ^
INSTRUMENT
D I V I S I O N OF T R A V E N O L LABORATORIES, INC.
Silver S p r i n g , M a r y l a n d
20910
Circle No. 19 on Readers' Service Card
4A ·
ANALYTICAL CHEMISTRY, VOL. 42, NO. 5, APRIL 1970
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