Photochemical Smog and Ozone Reactions
New Products UV Column Monitor
One book you can judge by its cover.
Newest of the Model 1520 series is the LUVMONITOR Π, UV column monitor designed expressly for gel filtration, ion exchange, column elec trophoresis, isoelectric focusing, and preparative HPLC. Featured are high sensitivity (0.001 OD), small cell vol ume (25 μΐ), linear readout with con centration changes, and a 5-in. strip chart recorder. Priced at $1397. Labo ratory Data Control 435
Hygrometer Field Calibration Systems
ADVANCES IN CHEMISTRY SERIES No. 113 Two symposia sponsored by the Divi sion of Physical Chemistry and the Division of Industrial and Engineering Chemistry and by the Division of Water, Air, and Waste Chemistry of the American Chemical Society with Bernard Weinstock and Lyman A. Ripperton, Cochairmen. Five papers in the symposium on "Photochemical S m o g " cover the following aspects of photochemical air pollution: • mechanisms of smog reactions • simulation of air pollution • models and abatement strategy Seven papers comprising the sympo sium on "Ozone Reactions in the At mosphere" present current research into the chemical behavior of ozone. Topics include: - reactions of ozone with ammonia, olefins, organic sulfides, and w i t h selected hydrocarbons to form aero sols • formation and destruction of ozone • role of carbon monoxide and hydro gen peroxide in the atmosphere • photooxidation of propylene in the presence of N 0 2 and 0 2 2 8 5 pages with index. Cloth (1972) $ 1 4 . 9 5 . Postpaid in U S and Canada, plus 4 0 cents elsewhere. Order from: Special Issues Sales American Chemical Society 11 55 Sixteenth St., N.W. Washington, D C . 20036
MG200 and MG201 are designed to produce mixtures of water vapor in carrier gas with an accuracy of ± 5 % or better to permit multipoint cali bration checks of any hygrometer over an ambient range of 10-40°C. A factory-calibrated permeation tube permits continuous operation for pe riods of from 1500 to 1600 hr at 100°C. Panametrics, Inc. 436
Chemicals Spectra and Chemical Teaching Aid Kit A spectra and chemical kit designed for courses involving laboratory anal ysis and identification of organic compounds consists of 100 selected organic compounds with correspond ing cards indicating the IR and NMR spectra. Liquids are packaged in 10-ml containers, and solids are in 5gram containers. Chem Service, Inc. 437
Cyanide Test Kit A new interference-free spot test kit can detect as little as 0.1-ppm bound cyanide in a matter of minutes. Free and bound cyanide are determined. Included are materials and reagents for 100 tests. Priced at $29.50. Koslow Scientific Co. 438
(Bio-Rad's new Price List Z) Bio-Rad's comprehensive 1974 catalog/price list numbers 100 pages, nearly double the size of the catalog we offered four years ago. New Price List Ζ stresses the practical application of materials, equipment and systems for chro matography, electrophoresis and membrane technology. The first 36 pages alone are so complete that they can be con sidered a short course in ion ex change technology. In fact, Price List Ζ contains the most complete listings available anywhere on ion exchange, gel filtration, gel permeation, adsorp tion and affinity chromatography. Price List Ζ is free for the asking. Contact:
BIO-RAD Laboratories
Benzhydrylamine Resin BHA resin consists of white polysty rene beads, 200-400 mesh, crosslinked with 1% divinylbenzene. This high-grade resin improves the pro duction and yield (90-100%) of solidphase synthesized peptides. A 10gram bottle is priced at $95. Beckman Instruments, Inc. 439 A N A L Y T I C A L CHEMISTRY
VOL. 46, NO. 8, JULY 1974
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