When you evaluate the Aminco- Bowman Spectrophotofluorometer CHECK THESE PERFORMANCE P R O V E N SPECS; S e n s i t i v i t y : better than 0.5 p p b . R e s o l u t i o n : 2 m/x, using 600 line/mm grating (1200 Line/mm Grating Accessory permits resolution of 1 π\μ). W a v e l e n g t h S c a n n i n g R a n g e : 200800 Γημ. (can be adjusted to operate up to 1200 m/i, with adjustment of grating angle). A N D THESE ACCESSORIES: P h o s p h o r o s c o p e , (photo A below) adapts the instrument for phosphorescent studies. Models available for analysis with or without polarization. I n f r a r e d Ac cessory, (B) extends upper wavelength range to 1200 m/x. P o t t e d P h o t o m u l t i p l i e r T u b e R 1 3 6 , (C) (interchangeable with 1P21 and 1P28 tubes), wavelength range: 200-800 πιμ, requires no cooling chamber, prevents leak age, drift and shift of output. Applicable in ultra-violet and near-infrared regions. 1 2 0 0 - L i n e / m m G r a t i n g effects two-fold increase in resolution of the standard instrument. T h e r m o e l e c t r i c C o o l e r , (D), controls tempera ture in the cell within ± 1 C throughout the range 10 to 30 C C in ambients of 18 to 3 0 ° C ; P r e - C o o l e r , temperature-conditions up to four cells to 10°C, prior to their insertion in the SPF; and Liquid C o o l e r , produces and main tains constant low temperature in the SPF cell compartment (to - 2 0 C ) . Solid S a m p l e Accessory, (E), permits assay of powder, crystal, paper, plastics, etc. Can be used for quantum counting. KBr P e l l e t H o l d e r a n d A n a l y z e r Accessory, (F), permits examination of three different samples or a KBr blank. A cold-finger attachment permits operation at temperatures as low as - 1 1 4 ° C . KBr D i e and A u t o m a t i c Press are also available. 1 2 Position S a m p l e C h a n g e r , (G), permits rapid sequential changes of samples. Invaluable for clinical studies. Unit mounts on the standard in strument. F r e e L i t e r a t u r e P o r t f o l i o 2 3 9 2 A C includes new bulletin and 30 accessories; complete Specification Sheet; Bibliography; cence Data Compendium.
on instrument and Lumines
Instruments for COORDINATED RESEARCH
A M INCO. Owners of the •Aminco-Bowman SPF need purchase only the saddle compon ent shown above to form a Fluoro-Microphotometer (a direct reading filter fluorometer) for studies in turbidi metry, nephelometric colorimetry.
A M E R I C A N I N S T R U M E N T CO., INC. 8030
Georgia Avenue, Silver Spring, Maryland
Circle No. 101 on Readers' Service Card Circle No. 53 on Readers' Service Card
VOL. 36, NO. 6, MAY 1964
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