Literature The Miran hydrocarbon-in-water ana lyzer and EPA alternate approved test ing methods are discussed in the Janu ary 1976 issue of Infrared News. Other articles in the 4-p newsletter describe moving the infrared analysis of process batches from the laboratory to the plant, the analysis of D 2 0-in-water, quantitative analysis systems, and an infrared detector for use with gel per meation and liquid chromatographs. Wilks Scientific Corp. 431 "UV Performance Specification for the High Intensity Tungsten-Halogen Source", a 6-p application note, illus trates the mode of operation that can be used with the Cary 118C spectro photometer with Varian's standard highintensity tungsten-halogen source. Varian Instrument Division 432 Model 460 atomic absorption spectro photometer is described in a 12-p bro chure. The microprocessor-controlled, double-beam instrument quickly and ac curately performs complex calculations with sophisticated logic programs. Perkin-Elmer Corp. 433
NEW
A new dye list provides a complete upto-date listing of dyes used in both the DL-Series and Spectroscan 10 dye la sers. The list comprises the most re cent dyes available including solvents, concentration, and molecular weight in formation. Molectron Corp. 437 A double spectrometer and laser Raman systems are described in two 4-p leaflets. Both feature descriptions of a new dete.ction unit and an auto mated scan-controller. All components are fully digitized so that they can inter act with computers or peripherals. Spex Industries, Inc. 438 The 56-p "Thin Film Optical Filter Guide" is comprised of five sections: filter guide, stock interference filters, custom-made interference filters, stock optics, and instruments and optical ac cessories. Corion Corp. 439
Catalogs Over 3000 scientific products are listed in the 196-p Science Supply Catalog 176. Includes glassware, pumps, spectro accessories,, and specialty items. Markson Science Inc. 440
Pharmacia Peristaltic Pump P-3 A compact pump electronically controlled for constant liquid flows in chromatography and gradient formation
You can • obtain three different flow rates at the same time through the three individually tensioned pumping channels • change tubes in seconds with the snap-in cassette • forget about pulsation thanks to the large driven rollers • rely on a constant motor speed, electronically compensated for load and temperature • use any flow rate between 0.6 and 400 ml/h per channel with the same gear box • reverse the flow instantly • push for maximum flow and clear pump lines rapidly
The 1975-76 membrane filtration products catalog features all Gelman fil ters, filter holders, and related equip ment for laboratory filtration. Gelman In strument Co. 441 The 1976 Techne water bath catalog, 16 p, features water baths, constant temperature circulators, cooling units, and driblock baths. Techne Inc. • 442 Eastman organic chemicals catalog No. 48, 223 p, lists alphabetically, with many cross references, thousands of chemicals and includes many of their properties, specifications, uses, and line and structural formulas. Eastman Kodak Co. 443 High-purity solvents are listed in a 4-p catalog. These are residue-free sol vents suitable for all types of chroma tography, spectrophotometry, scintilla tion counting, atomic absorption, mass spectral measurements, fluorescence determinations, and pesticide residue analyses. Burdick & Jackson Laborato ries 444 For more information on listed items, circle the appropriate numbers on one of our Readers' Service Cards
Learn more about molecular structure, energy trans fer, or chemical reactions with new magnetic sensi tivity. The ScT superconducting susceptometer measures the susceptibility of small samples with sensitivities 10 to 100 times better than available with force balance and vibrating sample systems. Magnetic field is variable from 0 to 20,000 gauss. Frequency response up to 10,000 Hz. Measure sample magnetization and susceptibility change with change in temperature from 4°K to 400°K. With temperature constant, measure suscepti bility change resulting from chemical reaction, absorption of optical flash, etc. Measure kinetics as well as magnitude. Measure tiny, even single domain, particles. Measure quickly without moving or vibrat ing sample. Discover what new sensitivity in magnetic suscepti bility can do for you. Write for the application brochure: "Superconducting Susceptometer:' 1400 Stierlin Road · Mountain View, California 94043 Telephone: (415) 964-4104
aoJL n4%ÈJÉÉmt!
Impossible magnetic susceptibility .m measurements "" aren't impossible any more.
For free descriptive literature, write or call: Pharmacia Fine Chemicals Inc. 800 Centennial Avenue Piscataway, New Jersey 08854 Phone (201) 469-1222
Ο
Pharmacia Fine Chemicals
CIRCLE 177 ON READER SERVICE CARD 326 A · ANALYTICAL CHEMISTRY, VOL. 48, NO. 3, MARCH 1976
SUPERCONDUCTING TECHNOLOGY INC.
CIRCLE 202 ON READER SERVICE CARD
