only the
Capacity of Research Model Cartridge lonXchanger (shown here in Duplex Mounting Fixture) is 500orains as CaCOa, 5 gph flow rate. Re moves all ionizable solids, Including sil ica and CO2, leaving less than 0.5 ppm.
Q V - 5 0 shimadzu
Spectrophotometer has all these accessories Capable of measuring in the wide wavelength range from far u.v. to near infrared (183 to 1200 mp) this versatile spectrophotometer can be supplied with a variety of optional accessories—developed expressly for the QV-50—that add greatly to its utility. Among these are: Flame Photometry Attachment—employs special combustion chamber housing, atomizer burner, pressure regulator, and all connecting tubing. Reflectance Spectrophotometric Unit—features movable sample holder for 3 samples with applicability to all color measurements of powders and solids. Optical Rotatory Dispersion Unit—covers the spectral range of 210 to 700 my and is useful in analysis of optically active compounds. Circular Dichroism Attachment—for measuring circular dichroism of optically active compounds. Vacuum monochromator unit also available for extended range measurement. Flow Dichroism Unit—used in studies of chain regularity and the conformation of macro-molecules. Vacuum monochromator unit also available for extended range measurement. Direct Meter Readout—for direct measurement of energy of light sources such as flame, fluorescence, atomic absorption, etc. Digital Reader—completely solid state system with Zener reference diode. Readable to 0.1% Τ or 0.001 Absorbance. Atomic Absorption Set—plus many other additional accessories. FREE BOOKLET describes the operating features and comparative advantages of the versatile QV-50. For your copy, write:
COSMOS SCIENTIFIC CO.
THE WATER IS
PURE & SIMPLE
THE WAY IS
Are you looking for a way to obtain mod erate quantities of extremely pure water — easily, quickly, and economically? Look no further! T h e I W T Cartridge lonXchanger system is for you. Mount it on a wall or post near the sink, snap the hose fitting onto the tap — you're i n business. Three types of holders (includ ing t h e Duplex, shown above, for t h e most "polished" water). Two types of Cartridges, with different resin charac teristics. I n daily use b y laboratories, schools, factories, apothecaries, power plants, hospitals^ dispensaries, and many others. For the complete scoop on details and prices,, ask your lab supply house salesman or, if that is impracticable, address yourself directly t o M R . A. W. MIOHALSON, ILLINOIS W A T E R T R E A T MENT COMPANY, 840 CEDAR ST., R O C K FORD, ILLINOIS 61101 (815-968-9691).
921 Berqen Ave., Jersey City, N.J. 07306 · (201) 925-1101 Stocking & Servicing Dealers: Ace Scientific Supply Co. Linden, New Jersey
Preiser Scientific Co. Charleston, West Virginia
DEALER
Physicians & Hospital Supply Co. Minneapolis, Minnesota
N Q U I R E S INVITED
Circle No. 12G on Readers' Service Card "See us a t Eastern Analytical S y m p o s i u m "
74 A
·
ANALYTICAL CHEMISTRY
îonJ&lMxnçfe : Circle No. 63 on Readers' Service Card
