HOW
INDUSTRIALUSESTHE DIETERT-DETROIT (BAHCO)
MICRO-PARTICLE CLASSIFIER
4 principal uses me:
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CLASSIFYING laboratory quantities of fine m a t e r i a l s for p r o d u c t or new m a t e r i a l research.
E J j CONTROLLING industrial processes using I M I or producing fine materials.
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DETERMINING the separating efficiency of air cleaners.
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PRE-TESTING dust collector requirements.
DETERMINE PARTICLE SIZE DISTRIBUTION below 6 0 m i c r o n s , in materials such as: Beryllium Powder Catalysts Ceramic Powders Chemicals D i a t o m a c e o u s Earth Drugs Dry P o w d e r s Fly A s h
Grinding Sand Metal Oxides Penicillin Polymers Powdered Metals M i l k Solids S t a n d a r d Dust Samples
H A R R Y W. D I E T E R T CO. CONTROL 9330 R o s e l a w n Send me details
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EQUIPMENT Detroit 4, M i c h .
on Micro-Particle
Classifier
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.State.
Circle No. 45 on Readers' Service Card 62 A
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ANALYTICAL CHEMISTRY
NEW BOOKS Spectroscopy, held at the University of London from March 28 to 31 was at tended by over 300 delegates including 65 from overseas countries. Emi nent authors were invited to review the progress in many fields in order to give a balanced appreciation of spectroscopy as it stands today. This book is a collection of these lectures. The titles and authors arc : Trends in the Chemi cal Applications of Spectroscopy bv H. W. Thompson, (F.R.S., St. John's College, Oxford) ; Atomic Absorption Spectroscopy by A. Walsh (C.S.I.R.O., Melbourne) ; Some Aspects of Atomic Absorption by R. L. Warren (Mid dlesex Hospital) ; X-Bay Fluores cence Analysis by Η. Ν. Wilson and B. J. Otter (LCI., Billingham) ; Nu clear Magnetic Besonance by R. E. Richards, (F.R.S., Lincoln College, Ox ford) ; A Study of Nuclear Magnetic Resonance Performance Parameters by R. B. Williams (Humble Oil and Re fining Co., Texas) ; The Method and Technique of Electron Resonance and Its Application to Metal Complexes by D. J. E. Ingram (University College of North Staffs) ; Electron Spin Reso nance of Free Radicals by D. H. Whiff en (National Physical Labora tory) ; Free Radical Spectroscopy bv Β. Ν. Dixon (Sheffield University)'; The Spectrophotometry of Free Radi cals in Flames by T. M. Sugden (Cam bridge University) ; Optical Absorption Spectra of Oriented Free Radicals bv G. W. Chantry (National Physical Laboratory) ; Far Infra-Red Spectros copy by G. R. Wilkinson, S. A. Inglis, and C. Smart (King's College, London) ; Rotation in Solution by W. J. Jones and N. Sheppard (Cambridge University) : The Origins of Group Frequency Shifts. Pt. I I . The In fluence of Inductive Effects and of NonBonded Interactions on Infra-Bed Group Frequencies, by L. J. Bellamy (E.R.D.E., Waltham Abbey) ; Fac tors Affecting the Characteristics of Infra-Red and Raman Vibrational Bands by H. W. Thompson, (F.R.S., St. John's College, Oxford) ; Develop ments in Applied Spectroscopy by V. Z. Williams (Perkins-Elmer Corp.) ; Some Uses of Electronic Computing Ma chines in Spectroscopy by A. D. Booth (Birkbeck College) ; Solvent Effects on Infra-Bed Spectra of Inorganic Com plexes by D. M. Adams (I.C.I., The Frythe) ; Vacuum Ultra-Violet Spectra and Photoionization of Molecules and Radicals by W. C. Price, F.R.S., R. Bralsford, and D. M. Boessler (King's College, London) ; The Electronic Spec tra of Small Polyatomic Molecules with Especial Reference to the Absorption Spectrum of Nitrogen Dioxide by R. K. Ritchie, A. D. Walsh, P. A. Warsop
ACCESSORIES INCREASE THE CAPABILITIES OF PERKIN-ELMER'S MODELS 421, 221 AND 21 INFRARED SPECTROPHOTOMETERS Sample preparation and handling are probably the most critical operations in infrared spectroscopy. That's why second best won't do when you choose sampling accessories. You'll realize the best per formance from your Perkin-EImer Mode! 421,221, o r 2 1 Spectrophotometer with Perkin-Elmer's quality cells and attachments, no matter what investiga tions you're undertaking. FOR GAS S A M P L I N G : Perkin-EImer cells include a wide variety of window and body materials, in path lengths from 2 centimeters to 40 meters, Pressure and Ijeated cells are also available. FOR LIQUID S A M P L I N G : Cells are provided in demountable or sealed versions, in various dis crete path lengths, for regular or micro sampling. Special cells with micrometer adjustments for vary ing path length are afso available, as well as heated cells for special studies. FOR
SOLID S A M P L I N G :
The KBr pressed-disc
technique is facilitated by special-purpose acces sories: dies, holders, vibrators—for preparing and analyzing samples in standard 13mm and micro KBr discs. Perkin-EImer also has special accessories that equip the Models 4 2 1 , 221 and 21 to handle other un usual sampling problems. A n d - m o s t large-instru ment accessories are adaptable to P-E's low-cost line of IR spectrophotometers. For complete de tails, write to Instrument Division, Perkin-EImer Cor poration, 7 5 1 Main Avenue, Norwalk, Connecticut.
1 - M e t e r Gas Cell
Variable Path Liquid Cell
KBr Micro-Die
PERKIN-ELMER Circle No. 185 on Readers' Service Card Circle No. 182 on Readers' Service Card
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