Manufacturers' Literature
OUR SMALL-SPACE METERING PUMP IS BIG ON ACCURACY.
Infrared Spectrophotometers. Summa rizes the complete product line avail able, a total of 14 individual instru ments. Wavelength ranges of all instru ments are shown in relation to each other. Perkin-Elmer Corp. 432
Balances. Features the Series 1200 electronic top-loading balances with Our Series 20 Chem/Meter hydraulic diaphragm metering pump microprocessors for expanded data will give you repetitive accuracy within ± 1% or better. handling capability. 4 pp. Brinkmann 433 Measuring only 9%" χ AV8" χ 37Ai', it's designed for steady, conInstruments Inc.
tinuous feeding of clear fluids. How? The programmed cam drive produces a constant velocity discharge—when the full displace ment of two plungers working 180° apart are combined in a common manifold, a steady flow is established. And it provides capacities to 4.9 and 16.0 ML/min—with pressures to 1000 psig. The series 20 Chem/Meter's wetted parts are made of corro sive resistant stainless steel with sapphire balls-seats and teflon diaphragms. With its totally enclosed, no-seal leakproof design and remote capacity control, its features make it ideal for applications such as chromatography columns, laboratory apparatus and indus trial wet process analytical equipment. To get all the details on why our little Chem/Meter is a big per former, write Chempump Division,Crane Co., Warrington, Pa. 18976.
CRANE ®
CHEMPUMP CIRCLE 34 ON READER SERVICE CARD
Chemist-Analyst. Vol. 66, No. 2 fea tures articles on SI conversion, arc emission spectrography, Standard Ref erence Materials, and high-purity qui nine sulfate as a fluorescence standard. 6 pp. J. T. Baker Chemical Co. 434 Multipurpose Meter. Describes the Model 671 digital meter that will mea sure pH, ORP (redox), specific ion, dis solved oxygen, and temperature on one instrument. Extech International Corp. 435 Research Microscope. Provides infor mation on the Biophot research micro scope and its newly developed chro matic-aberration-free, multicoated op tics. 12 pp. Nikon Inc. 436
For peak performance around the world s Gas - Chrom Q The Silane-Treated Solid Support for Gas Chromatography G A S - C H R O M ® Q is the highest quality silane-treated diatomaceous earth support available. Each lot of G A S - C H R O M ® Q produced is double checked under a rigid q u a l i t y c o n t r o l procedure. G A S - C H R O M ® Q is available as f o l l o w s : • 50 and 100 gram quantities in 6 0 / 8 0 , 8 0 / 1 0 0 , 1 0 0 / 1 2 0 , and 1 2 0 / 1 4 0 mesh f r o m stock. • Pretested GC packings coated o n G A S - C H R O M ® Q (available f r o m stock). • Custom-made packings and columns using GASC H R O M ® Q w i t h a 2 4 - 4 8 hour delivery. For detailed i n f o r m a t i o n send f o r : "Technical Bulletin No. 3, a bibliography of over 5 0 0 references o f GC applications using G A S - C H R O M ® Q . "Technical Bulletin No. 5 for details o f our quality c o n t r o l procedure. "Catalog 20 for complete ordering i n f o r m a t i o n .
Applied Science Laboratories Inc. P.O. Box 440, State College, Pennsylvania 16801
CIRCLE 9 O N READER SERVICE CARD 1050 A · ANALYTICAL CHEMISTRY, VOL. 4 9 , NO. 12, OCTOBER
1977
Phone 814-238-2406
