Product Capsules Centrifuges. Bulletin available on c o m p a n y ' s new high-speed angle centrifuge. A fully enclosed table model with speeds u p to 17,000 rpm, forces u p to 34,390 X G a n d a capacity of 400 ml. Features safety, remote control, complete instrumentation a n d unique cooling system. International E q u i p m e n t Co'., 1284 Soldiers Field R d . , Boston 35, M a s s . 48 A Chromatographs. Circle indicated numbers for bulletins on t h e following vapor phase chromatographic apparatus: " C h r o m a c o n " models designed for operation a t atmospheric a n d reduced pressures (operating t e m p e r a t u r e range from 25° C. t o 350° C ) , 17A-1; t h e " C h r o m a n e t t e " (portable) used as a field unit for analyses limited to a m bient temperatures, 17A-2; a n d the " C h r o m a n e e r P l a n t " used for industrial purification of liquid or gaseous m a t e rials processed in small quantities, 17A3. Podbielniak, Inc., 341 E a s t Ohio S t , Chicago 11, 111. 17A-1,2,3 C h r o m a t o g r a p h s . D a t a file available on c h r o m a t o g r a p h s (with a control range from 40° C. t o 240° C.) t h a t can handle gases and liquids with boiling points u p to 350° C. and m a i n t a i n column t e m peiatures closer t h a n ± 0 . 5 ° C. Scientific I n s t r u m e n t s Div., B e c k m a n I n s t r u m e n t s , Inc., 2500 Fullerton R d , Fullerton, Calif. 32A
IN A QUANDARY?
YOU NEED A SPECTROPHOTOMETER
BUT-WHICH ONE? B-A c a n h e l p y o u w i t h t h e p r o p e r i n s t r u m e n t to fit y o u r n e e d s . The B-A Model 4-55 Spectrophotometer is essentially a complete analytical laboratory in 11 self. • Qualitative and Quantitative Analyses • High Resolution and Variable Scanning Speed • Accessibility for Modifications and Maintenance These are but a few highlights
C h r o m a t o g r a p h s . Bulletin shows t h e " P a r t i t i o n e r ' s " potential value for a n alytical control of petroleum products, gas a n d liquid fuels, p l a n t effluent gases, commercial solvents, a n d m a n y other industrial a n d research uses. Fisher Scientific Co., 100 Fisher Bldg., P i t t s b u r g h 19, P a . 52A C h r o m a t o g r a p h s . Descriptive folder and details available on gas-liquid chrom a t o g r a p h y i n s t r u m e n t . Boiling range: 20°-400° C. T e m p e r a t u r e increase r a t e . 2° C . / m i n . T e m p e r a t u r e maintained within 1° C. Uses 1.1 sq. ft. bench space. Wilkens I n s t r u m e n t & Research, Inc., Acheson Bldg., Berkeley 4, Calif. 64A-1 C h r o m a t o g r a p h s . Circle 71A for bulletin on c h r o m a t o g r a p h t h a t provides fast, accurate analysis of almost a n y mixture, including liquids with boiling points as high as 325° C. Uses no vacuum tubes. T h e heated sampling valve eliminates b o t h sample contamination a n d condensation. Sample volumes are consistently reproducible t o better t h a n ±l/>%. Consolidated Electrodynamics Corp., 300 N o . Sierra M a d r e Villa, Pasadena, Calif. 71A
The B-A Model KM-1 is the first expandable double-beam spectrophotometer — a fundamental tool for the analytical chemist. • Open sampling compartments • Simplified controls • Recording either linear to wavelength or wavenumber • Versatility — expandable as needed with accessory kits to increase performance
You can achieve BETTER ANALYSIS thru Infrared Spectrophotometry By BAIRD
Call on our experienced staff to help you.
ATOMIC
Bulletin IR—448A yours on request.
Baird-Atomic,
Inc.
33 UNIVERSITY ROAD, CAMBRIDGE 38, MASSACHUSETTS
(Continued on page 88 A) For further information, circle number 87 A on Readers' Service Card, page 99 A V O L . 2 9 , N O . 9 , SEPTEMBER
1957
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