Now you can use self-lubricating TEFLON® STOPCOCKS on an everyday basis! Kontes saves you money three ways on chemically· inert* Teflon items!
Roland Gohlke, Dow Chemical Company engineer, using Bendix Mass Spectrometer to identify compounds emerging from a gas chromatograph.
NOW BENDIX* TIME-OF-FLIGHT MASS SPECTROMETER RECORDS MASS SPECTRA T h e ability to r e c o r d either mass spectra or mass ratios further widens the versatility of the Bendix Mass Spectrometer. T h e speed and ease of using this new Analog O u t p u t System are illustrated by the following example: During a recent routine analysis performed at our Research Laboratories Division, one h u n d r e d mass spectra were recorded on a direct w r i t i n g r e c o r d e r in less t h a n t w o hours. These were the mass spectra
APPLICATIONS C h r o m a t o g r a p h output i d e n t i f i c a tion.
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M o l e c u l a r b e a m analysis, including solids' analysis a n d high t e m p e r a t u r e research.
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Fast r e a c t i o n studies such rocket exhaust analysis.
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N e g a t i v e i o n studies.
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Simple, r a p i d analysis.
Ontario.
«TRADEMARK
FEATURES
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• Analysis o f ions c r e a t e d the mass spectrometer.
of the eluted components of a mixture being separated by a gas chromatograph a n d fed continuously into the Bendix Spectrometer for identification. For complete details contact the Cincinnati Division, Dept. C2, 3130 Wasson Road, Cincinnati 8, Ohio. Export Sales: Bendix International Division, 205 E. 42nd St., New York 17, N.Y. Canada: Computing Devices of Canada, Ltd., Box 508, O t t a w a 4,
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RUGGED—The D o w C h e m i c a l C o m p a n y e x p e r i e n c e d only Vi o f one percent d o w n t i m e f o r maintenance during the first six months of operation.
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F A S T — 1 0 , 0 0 0 mass spectra p e r second.
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HIGH RESOLUTION — U s a b l e a d j a c e n t mass resolution b e y o n d 5 0 0 a.m.u.
as
outside •
ATOMIC MASS UNITS Oscillogram of xenon spectrum. •
WIDE MASS RANGE —Each spectrum covers 1 t h r o u g h 4 0 0 0 a.m.u. • SIMPLE, OPEN C O N S T R U C T I O N — Permits easy modification f o r special p r o b l e m s .
VARIOUS OUTPUTS—Oscilloscope used alone o r in c o m b i n a tion with ion pulse counting o r r e c o r d i n g outputs.
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COMPARE KONTES QUALITY! Teflon
Stopcock barrels are ground and polished, providing the ultimate in smooth, even turning without lubricant. Special spring-loading device keeps plug properly seated and leak-free without dangers inherent in over-tightening. Wall thickness is appreciably greater than other brands. Sidearms increase gradually in o.d. and decrease in i.d. at seals to barrels for greater strength and improved flow characteristics. Order now for immediate de· livery I Write for your free copy of our new Bulletin TP-1. It describes all Kontes Teflon ware including beakers, burettes, pipettes, separatory funnels, stopcocks, etc. K-81100 STRAIGHT STOPCOCK prices below are typical— Size Bore, mm. Plug size, mm. Each
2 A 3 A J 2 j 4
2 3 2 4
10/25 10/25 12/30 17/40
4.50 4.50 6.90 9.20
*Teflon has almost universal chemical inertness. ®Reg. T.M., E. I. du Pont de Nemours & Co., Inc.
A L U M I N U M GASKETS, HIGH TEMPERATURE FEEDTHROUGHS— Permit effective b a k e o u t .
S e e T h e Bendix M a s s S p e c t r o m e t e r A t T h e Pittsburgh C o n f e r e n c e O n A n a l y t i c a l And Applied Spectroscopy, Penn-Sheraton
Increased production has lowered prices substantially on all Kontes Teflon Stopcocks and apparatus which incorporate them. You save, in fact, three ways by getting Teflon products from Kontes: by reduced individual prices, by lower quantity prices, and by combining Teflon items with your regular orders for Kontes Technical Glassware for even greater discounts.
H o t e l , F e b . 2 9 Through M a r . 4 .
Chemistry
Booth N o . 6 4 .
KONTES GLASS
Cincinnati Division
Bendix
CINCINNATI, O H I O
AVIATION CORPORATION
COMPANY
First Choice For Quality
Technical
Glassware
V i n e l a n d , New Jersey Midwest Distributor: Research Apparatus, Inc., Wauconda. III.
Circle No. 35 on Readers' Service Card 144 A
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ANALYTICAL
CHEMISTRY
Circle No. 126 on Readers' Service Card
