VARIAN associates - ACS Publications - American Chemical Society

VARIAN associates. Anal. Chem. , 1954, 26 (8), pp 46A–46A. DOI: 10.1021/ac60092a748. Publication Date: August 1954. ACS Legacy Archive. Note: In lie...
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NEW PRODUCTS Finished strips a r e analyzed i n a photoelectric u n i t t h a t automatically t r a n s l a t e s d y e density i n t h e strips into a p e n - d r a w n curve of c o m p o n e n t concentration a n d a corresponding saw-tooth line which gives a direct integration of t h e areas u n d e r a n y selected portions of t h e curve. 18

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Distillation Control

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as revealing as your fingerprint Because it offers a completely fresh approach to the study of chemical systems, Varian's Model V-4300 High Resolution n-m-r (nuclear magnetic resonance) Spectrometer has become an instru­ ment of major importance to analytical chemists everywhere. Now at work in research laboratories throughout America, this remark­ able new device detects signals from H', F'f P3! B", C ? Hz, Η'ή and several other nuclei, revealing the character of the chemi­ cal environment. High Resolution n-m-r techniques permit rapid, non-destructive analysis of small liquid samples, including melted solids, solids in solution and liquefied gases. Prominent applications include iden­ tification of functional groups, equilibrium and kinetic studies, assignment of structural formulas and analysis of multi-component mixtures.

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Sample: CFz=CFCl Volume: .03 cc. Frequency: 30 mc. Field: 7500 gauss Sweep Rate: 50 milligauss/sec. Zero of Reference. 9 Magnetic field at F nucisi in perfluorocyclobutane

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FOR THE COMPLETE STORY . • • •

Technical Information Data Sheets n-m-r Table

THE LEADERSHIP

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associates 4,

C A L I F O R N I A

For further information, circle number 46 A on Readers' Service Card, page 37 A

46 A

Intermediates. Eight-page bulletin covers properties a n d uses of 14 inor­ ganic halogen compounds available from Michigan Chemical Corp. 21

Warburg A p p a r a t u s . Six-page folder describes construction a n d operation of t w o circular, r o t a t a b l e manometric research units for gas microanalysis. Bronwill Scientific, I n c . (Models VV and rVL). 23

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On Varian's Model V-4300 High Resolution n-m-r Spec­ trometer, as well as the Model V-4200 Variable Frequency n-m-r Spectrometer, write to the Special Products Division for:

MARK OF

A n a l y s i s of A l k a l i e s . Revised edition of bulletin on analytical methods for alkalies contains information on new procedures a n d reagents, as well as recalculated analytical factors. Solvay Process Div., Allied Chemical & Dve Corp. (Bull. 9). 20

Biochemicals. Price list of 8 pages covering amino acids, peptides, poly­ peptides, enzymes, hormones, carbohy­ drates, and other biochemicals offered by M a n n Research Laboratories, Inc. 2 2

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MANUFACTURERS' LITERATURE

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NUCLEAR

An instrument for control of vacuum distillations is being built b y Weiller I n s t r u m e n t s Corp. T h e Resi-Twin is provided with eight sockets t o take plug connectors of resistance thermometer bulbs. T w o of the bulbs are connected to a differential control which is de­ signed t o maintain a constant tempera­ ture difference between t w o points of the still. A switch on t h e upper panel connects the indicator bridge either t o t h e con­ trol or to switches on t h e lower panel. I n the first position, control and bridge operate from t h e same b u l b ; in t h e second position, a n y one of six bulbs may be connected t o t h e bridge. T h e instrument measures a n d controls t o 400° C. 19

Bulletins

Balances. Bulletin of 8 pages d e ­ scribes construction a n d performance of various types of analytical balances, including s t a n d a r d , semimicro, a n d micro models. Fisher Scientific Co. (Ball. FS-207). 24 Vacuum Pumps. Four-page folder covers design, specifications, a n d appliFor further information, see coupon on page 37 A ANALYTICAL

CHEMISTRY