No. qjij in the ADVANCES IN CHEMISTRY SERIES MASS SPECTRAL CORRELATIONS by FRED W. McLAFFERTY Dow Chemical Company
THE DOOR TO SUCCESS IS SELECTION Buchler UVISCAN II is the double-beam ultraviolet monitor designed to solve your selection problems. Attach the UVISCAN II to an electrically-driven fraction collector, such as the Buchler Sectional Turntable Fraction Collector; make a few simple tubing and recorder connections; and the system is ready to monitor. This is the U-V monitor designed with special attention to detail. • The double beam handles solvents with changing ab sorptions or handles two separate chromatographic columns supplying outputs for two recorders. • UVISCAN II has a sensitivity of 0.01 optical density unit and a spectrum range of 230 to 300 mu. • A flow cell with an adjustable light path of from 1.5 to 5 mm or from 5 to 10 mm. The detail of price is not overlooked either —for 115 volt, 60-cps operation, the UVISCAN II price is $780.00. Other models are available for different power sources. So, when you are looking for that fraction of value, select it automatically and successfully with the Buchler UVISCAN II —another instance where Buchler provides the key to that door. Send for Bulletin
Λ-3-5000Λ
BUCHLER INSTRUMENTS, INC. 1327 16th Street, Fort Lee, New Jersey 07025 Phones: ( N . J . ) 201-945-1188· ( N . Y ) 212-563-7844 Circle No. 166 on Readers' Service Card 42 A
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ANALYTICAL CHEMISTRY
This compilation gives t h e empiri cal and structural f o r m u l a s of ions t h a t m i g h t be f o u n d at a particular m / e in a mass s p e c t r u m plus an indication of how each such ion m i g h t have arisen. It contains a wide variety of c o m p o u n d types. Some 4,000 mass spectra are refer enced. The author has drawn freely f r o m his extensive background in mass spectrometry as well as f r o m t h e efforts and ideas of colleagues and co-workers. You can f i n d possible ion structures and precursor mole cules for each of t h e p r o m i n e n t ions in t h e mass s p e c t r u m of an u n k n o w n c o m p o u n d with a further indication of the general probability of their occurrence. Newcomers to the field will f i n d this book indispensable. Experts will f i n d it a timesaver in interpreting the s p e c t r u m of an unfamiliar com pound w h e n information is lacking on t h e history of the s a m p l e . La boratory directors will want copies for staff m e m b e r s . Why not put this v o l u m e to work for you? 117 pages. Paper bound. Price: $4.75
Order from: Special Issues Sales American Chemical Society 1155 Sixteenth Street, N. W. Washington, D. C. 20036
