Εxtend
Into
Fluorescent
The
Ultra
Measurement
Violet
Region...
WITH THE
SPECTROPHOTOFLUOROMETER tfs
Photomultiplier Microphotometer
Prior to the advent of this instrument, fluorescent measurement was limited to available filters rang ing from 365 m μ up. Since many compounds are activated and fluoresce at wavelengths below 365 m μ, this factor severely limited various types of analysis. The range of the Spectrophotofluorometer extends from 200 to 800 millimicrons which, in effect, opens up completely new areas for investigation. A brief, initial survey of organic compounds of biological interest, has revealed the presence of useful fluorescence in many solutions not previ ously known to fluoresce in solution. A table listing these data is included i n A m i n c o ' s B u l l e t i n 2 2 7 8 , along with a full description of t h e n e w instrument. Copies of t h e bulletin will b e provided u p o n request.
Send f o r Bulletin No. 2 2 7 8 - Η Furnished Upon Request
The Spectrophotofluorometer is an assembly in corporating: (1) An optical unit embodying acti vating and fluorescent monochromators, and a Xenon Lamp which produces a continuous, highintensity ultraviolet light; (2) A Photomultiplier Microphotometer, which amplifies electrical sig nals and transmits indications to its own meter for direct readings of concentrations, and to a Cathode-ray Oscillograph, which permits rapid quantitative analysis and survey. A trace showing scatter (left peak) and fluores cence (right peak) of Quinine, is shown at left. Several types of recorders are available for re cording both activation and fluorescent spectra.
AMERICAN INSTRUMENT COMPANY, INC.
Silver Spring, Maryland In Metropolitan Washington, D. C.
For further information, circle number 27 A on Readers' Service Caril, page 63 A
V O L U M E 2 8, N O . 12, D E C E M B E R 1 9 5 6
27 A
