NOW
THERE
ARE PHOENIX INSTRUMENTS FOR MOLECULAR WEIGHT & SIZE STUDIES
How do you get the highest resolution consistently in ion exchange chromatography? 6
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&**r^'N THE NEW PHOENIX A U T O M A T I C S C A N N I N G . L O W - A N G L E LIGHT-SCATTERING PHOTOMETER . . . designed to yield size and shape information in the 0.2 to 200 Micron diameter range.
THE BRICE-PHOENIX LIGHT-SCATTERING-PHOTOMETER . . . measures molecular and micellar weights from 300 to I Billion. Also measures size, shape, mass . . . interactions in solutions, turbidity, dissymmetry and depolarization.
THE BRICE-PHOENIX DIFFERENTIAL REFRACTOMETER . . . measures the difference in refractive index between solutions and its solvents and concentrations . . . has greater accuracy, extended range and increased stability, with sensitivities to I0" 6 R. I. units. These instruments are backed-up by over 1000 published bibliographies compiled since 1945 on light-scattering, covering 22 categories from oerosots to synthetic polymers. Send for FREE LITERATURE KIT containing these valuable references, as well as reprints and bulletings on light scattering instrumentation.
PHOENIX PRECISION INSTRUMENT COMPANY World Wide S o l e · · . Service A Subsidiary of
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ICjJUO] INSTRUMENTS CORP.
Only by using Bio-Rad AG® resins! BIO-RAD AG resins represent the highest level of purity available for ion exchange chromatography. AG resins are exhaustively purified and sized to specific ranges to assure sharp resolution and highest reproducibility. For example, the maximum iron con tent in AG-1 anion resin is 0.00005%. For the full story on BIO-RAD and its role in ion exchange technology — in cluding valuable data on Bio-Rex resins, specialty resins, resin selection, regeneration and applications — send for our general catalog, Price List T.
BIO-RAD Laboratories
3803-05 N. 5th Street. Phila , Penna. 19140 U.S.A.
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ANALYTICAL CHEMISTRY
