Exciting and timely subjects.. with a publication to match:
The Journal of Agricultural and Food Chemistry W i t h the w o r l d ' s n u t r i t i o n a l crisis fast b e c o m i n g a reality, more and more attention is being focused o n these criti cal fields of chemistry. Pesticides (their m o d e of action and residue analysis), the chemistry and iden tity of flavors and the nature and identity of additives, are all regularly discussed in the pages of JAFC. A m o n g the other subjects covered are the identity and metabolic rate of f o o d toxicants, plant nutrients and regulators and chemistry of f o o d processing. If y o u are a chemist—chemical engi neer — agronomist — entomologist — n u tritionist—or are just interested in the broad fields of agricultural and f o o d p r o cessing c h e m i s t r y - y o u ' l l find this journal a most valuable and informative p u b l i c a t i o n . Start your o w n personal subscription by c o m p l e t i n g and returning the f o r m below. Note: Subscriptions at ACS Member Rates are for persona! use only.
INDEX TO ADVERTISERS IN THIS ISSUE *Varian Associates, Aerograph Division 39, 143 Chiat/Day, Inc. e Varian Associates, Analytical Instru ments Div 86 Chiat/Day, Inc. Wescan Instruments Harris & Associates *Whitey Research Tool Co Falls Advertising Co. «Wilks Scientific Corp A. B. W. Toft & Co. •
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33 IBG 56
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Laboratory Supply Center Bio-Rad Laboratories Burdick & Jackson Laboratories, Inc. Eastern Chemical Corp. GCA Corp.. Technology Div. Gollob Analytical Service LaMotte Chemical Products Co. Quarts Scientific, Inc. Reactor Experiments, Inc. Southwestern Analytical Chemicals Stanford Glassblowing Labs, Inc. University of Minnesota West Coast Technical Service Advertising Management for the American Chemical Society Publications REINHOLD PUBLISHING CORP. A subsidiary of Litton Publications, Robert N. Sillars, Jr., General Manager, ACS Publications Division: 600 Summer St., Stamford, Conn. 06904. Phone 203-348-7531. Cable Address: REINPUB STAMFORDCONNECTICUT ADVERTISING SALES MANAGER-EAST J. Barry Stanford
Please enter my subscription to the Jour nal of Agricultural and Food Chemistry at the rates checked below. ACS Members: • U.S $10 Π Canada, PUAS $13 • Other Nations $13.50
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Nonmembers: Π U.S. $20 D Canada, PUAS $23 Π Other Nations $23.50
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Plug-in flow cells
ADVERTISING SALES MANAGER-WEST Laurence O. Roberts SCIENTIFIC PRODUCTS SPECIALISTS
American Chemical Society 1155 Sixteenth Street, N.W. Washington, D.C. 20036
Ultra-sensitive UV detector has 10,000 to 1 range
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This new UV flow photometer has the high sensitivity required for chromato graphic trace analysis along with the broad range and flow capacity needed for preparative work. Π Chromatronix Model 200 combines a linear absorbance range from .0001 to 3.0 O.D. with very low noise and drift—less than .0004 O.D. Low drift is insured by a unique multi plexed double-beam system, which uses a single vacuum diode detector to elimi nate differential temperature drift. Π Measurements can be made on any of ten absorbance ranges (from .01 O.D. full scale to 5.12 O.D. full scale) or on a single 0 to 100% transmittance scale. Recorder outputs of 1 mv and 10 mv are supplemented by a 0 to 1 ma output, which will drive low-cost galvanometric recorders. Π Two interchangeable plugin flow cells are available: an 8-μΙ cell for micro-column analyses and a 32-μΙ cell for monitoring preparative separations, density-gradient centrifugation and elec t r o p h o r e s i s . The o p t i c a l chamber is sealed and can be purged with dry gas to prevent condensation in cold rooms. Π Chromatronix also offers a new ultra sensitive, wide range conductivity moni tor for chromatography. Inquiry will bring you literature on it as well.
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CHROMATRONIX
C h r o m a t r o n i x , I n c . , 2 7 4 3 N i n t h St. Berkeley, Calif. 94710. Phone (415) 841-7221. Circle No. 148 on Readers' Service Card ANALYTICAL CHEMISTRY, VOL. 42, NO. 6, MAY 1970 . 147 A
