MANUFACTURERS' New Name to Reckon With:
LITERATURE
Lab-Crest
Liquid Scintillation Systems.
An 8-
page bulletin discusses flow monitor and flow detector systems for continu ous measurement of radioactivity in liquid and gas chromatography ef fluents. In addition, an 8-page folder is available which describes the 3000 and 4000 series of spectrometers for analysis of discrete samples containing beta- and alpha-emitting isotopes. Packard Instrument Co., Inc., Box 428, La Grange, 111. 601
SCIENTIFIC DIVISION Fischer & Porter Co. (Formerly Glass Products Division)
Gas Chromatography Materials.
An
18-page bulletin contains information on gas chromatography stationary phases and stationary media manufac tured by May and Baker, Ltd., Eng land. Tables classify stationary phases by name and by application and give references. Gallard-Schlesinger Chemi cal Mfg. Corp., 1001 Franklin Ave., Garden City, Ν. Υ. 602 Ultraviolet Analyzer. A 4-page folder describes the compact Model 1056-A UV analyzer. The instrument covers the spectrum from 200 to over 400 ταμ and uses 2 flow cells of optically polished quartz in split-beam operation. Vanguard Instrument Co., P. O. Box 244, La Grange, 111. 603 Gas Chromatograph. A 12-page bro chure describes the Model 154 D Vapor Fractometer. This is the company's basic instrument and is available with a pyrolysis accessory and electron cap ture detector. Other choices of detec tors and other accessories are also dis cussed. Perkin-Elmer Corp., Main Ave., Norwalk, Conn. 604
WHAT GOES ON HERE? If you do any chromatography at all, it should be the new Lab-Crest needle valve, designed especially for your use. It's not a make-do adaptation, but a brand-new design with the precise control and reproducibility you need. It takes 12 turns of the new valve to get from positive-zero close to unimpeded (3 mm) open—and there's a reference scale on the stem for hairline accuracy. The valve will never freeze, never need grease. Its body is precision-bore glass tubing; its needle, Teflon. You can have the valve either by itself or built right into one of our new chromatography-column bottom connections. (The new connections are more than pretty good themselves: minimum volume between the removable fritted disc and the valve keeps the effluent you're working with from remixing.) All things considered, the built-in's your best bet, but if you just want the valve itself, fine. We'll be glad to oblige. If you'd like information on either the valve, the bottom connections, or both, let us know.
® SCIENTIFIC
Lab-Crest
DIVISION
FISCHER & PORTER COMPANY, 1603 County Line Road, W a r m i n s t e r , Pa. Circle No. 167 on Readers' Service Card 156 A
•
ANALYTICAL CHEMISTRY
Dosimetry System. A 6-page folder presents the concept of thermolumines cent dosimetry and the technical char acteristics of the company's lithium fluoride thermoluminescent dosimetry system. The dosimeter responds over the range from 0.1 to 100,000 r. with a precision of ± 2 % . Controls for Radia tion, 130 Alewife Brook Parkway, Cam bridge 40, Mass. 605 Gas Chromatography
Supplies.
A
32-page catalog contains information on gas chromatography column materials and accessories. In addition to listing liquid phases and solid supports, infor mation on the composition and prepara tion of solid supports and application of liquid phases for particular separations are given. Wilkens Instrument & Re search, Inc., P. O. Box 313, Walnut Creek, Calif. 606
