ULTRAPURE chemicals
When you simply can't tolerate impurities or uncertainties in your reagents Over 100 of the purest reagents and chemicals available anywhere in the w o r l d . Every product is a c c o m p a n i e d by a detailed Certificate o f A n a l y s i s of the actual lot s u p p l i e d . In terms of spectrochemically detectable impurities, ULTREX p r o d u c t s are typically 9 9 . 9 9 5 % to 9 9 . 9 9 9 9 5 % pure. A n d the extremely low content of all impurities (often at the parts per billion level) satisfies the most rigid use requirements. Whenever your requirements for purity a n d product definition are stringent, ULTREX ultrapures c a n indeed insure against loss of time, effort, a n d other e x p e n s e s .
RECYCLED Instruments Save Money! Ρ re-owned but completely refurbished and fully f*jg*~- U — warranted . Save 5 0 % of the new replacement cost from the nation's leader In REBUILT Atomic Absorp tion, Infrared and Ultra violet-Visible Sp eters.
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ACCESSORIES Competitively priced accessories in stock, Included are As, Se, and Hg Kits. Hollow cathode lamps, stand ard solutions for AA. Infrared solid, liquid and gas sampling devices also available. SERVICE jf—" »^_^_ We provide service, repair and preventative main* tenance at rates lower than the original equipment fir manufacturers.
Consider ULTREX w h e n you just can't afford to g a m b l e with impurities or uncertainties.
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Reagent brochure.
BUCK Scientific, Inc.
J. T. Baker Chemical Co. Phillipsburg, N.J. 08865
58 Fort Point Street, East Norwalk, Conn. 06855
201 859-5411
(203) 853-9444
CIRCLE 2 2 O N READER SERVICE CARD
CIRCLE 15 ON READER SERVICE CARD
Marine Chemistry in the Coastal Environment
ACID
Now available—a comprehensive volume containing the most recent advances in this new and increasingly important field.
ACS Symposium Series No. 18 Thomas M. Church, Editor A special sym posium sponsored by the Middle Atlantic Region of the American Chemical Society.
The collection represents an indispens able source of information for every marine scientist. Emphasis is not merely on describing coastal problems but on showing the potential in applying the tools of modern oceanography and chemistry to solve these problems.
DIGESTION BOMBS
The rapid and safe way to dis solve inorganic samples in HF, HC1 or HNO :f , or to digest or ganic materials in strong alka lis or oxidizing acids with com plete sample recovery.
Forty-one chapters cover six major areas:
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physical, organic, and tracer marine chemistry; estuarine geochemistry; hydrocarbons and metals in the estua rine environment; ocean disposal forum; applications and resources in marine chemistry; and organic and biological marine chemistry.
Now available in two models: a general purpose bomb f o r temperatures to 150° C and pressures to 1200 psig, and a new high pressure bomb for samples which require disso lution temperatures up to 285° C and pressures to 5000 psig.
710 pages (1975) Clothbound $35.75 (ISBN 0-8412-0300-8) LC 75-28151
Both have removable, 25 ml Teflon cups with convenient closures, long-taper seals and other exclusive Parr features. For details, write or phone: Parr Instrument Co., Moline, III. 61265. Telephone 309/7627716
Order from: Special Issues Sales American Chemical Society 1155 Sixteenth St., N.W. Washington, D.C. 20036
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CIRCLE 169 O N READER SERVICE CARD A N A L Y T I C A L CHEMISTRY, V O L . 4 9 , NO. 13, NOVEMBER
1977 ·
1181 A
