It's not green cheese!
New Products
Ion-Exchange Manual
Fourier T r a n s f o r m Spectrophotometer Model 318S FT spectrophotometer has a minimum frequency range of 3800-625 c m - 1 . Resolution is eight wave numbers up to a maximum of two wave numbers with modifica tions. The minimal system is a 16K core computer with a maximum of 64K available. Willey Corp. 424
So what is the moon made of? Data provided by the Apollo, Surveyor and Luna missions give us the answer.
Specific Ion Electrodes A line of 16 solid-state specific-ion electrodes includes arsenic-5, residual chlorine, chromium 6, and phosphoric 5—available as monoprobes or with built-in reference as combination probes. A series of ppm standards permits calibration accuracies of ±2%. Monoprobes are priced at $125, and combination probes at $165. Chemtrix, Inc. 436
To find out, fill in the coupon below and send for a copy of The Chemical Composition of the Lunar Surface by Anthony Turkevich, University of Chicago reprinted from Accounts of Chemical Research,
Petroleum Colorimeter This instrument is designed to con form to ASTM Method 1500D for the visual determination of the color of petroleum products, heating oils, die sel fuels, waxes, and related lubri cants. The unit consists of a standar dized light source, cylindrical glass jars for the sample, and a circular turret containing 16 color standards. Lovibond of America, Inc. 433
March 1973 9 pages with cover
0214/10405
The Chemical Composition of the Lunar Surface $2.00 Anthony L. Turkevich
Name: Address: Zip
Mail With Remittance To: Journals Department American Chemical Society 1155 16th Street, N.W. Washington, D.C 20036
Chemicals Electrophoresis Reagents A complete line of specially purified gel electrophoresis reagents includes acrylamide and N,iV-methylenebisacrylamide, buffer components, and stains. A 12-p pamphlet lists 169 re agents for electrophoresis and 90 lit erature references to their use. Polysciences, Inc. 439 A m i n o A c i d Analysis Kit A complete kit for the analysis of amino acids by gas-liquid chromatog raphy permits 24 analyses per 8-hr day. With inexpensive reagents, all 21 common amino acids are derivatized in 30 min by a simple test tube proce dure. The derivative used is the npropyl, iV-acetyl. Gallard-Schlesinger Chemical Mfg. Corp. 440
(Free) The first 36 pages of Bio-Rad's new Price List Ζ are more than just a listing of ion exchange resins, cellulose and gels. What you'll have is essentially a short course in ion exchange chroma tography with strong emphasis on applications and the latest tech niques. Bio-Rad has also included trade name cross references, properties and chemical structures, and resin conversion methods. Over 50 different products are described for separation, purifica tion, isolation and concentration of trace metals, amino acids, car bohydrates, isotopes, lipids, pep tides, proteins, and purines. For your free copy of Price List Z, contact:
BIO•RAD Laboratories 32nd and Griffin Avenue Richmond, CA 94804. Phone (415) 234-4130 Also in: Rockville Centre, N.Y.; Mississauga, Ontario; London, England; Milan, Italy; Munich, Germany.
ANALYTICAL CHEMISTRY, VOL. 46, NO. 7, JUNE 1974 · 669 A
