N e w Products
Labwareand instruments 100 LC columns. Prepacked LC columns use silica-based bonded phase materials to achieve efficiencies better than 65,000 plates per m, high peak symmetry, and good chemical stability. Rainin Instrument 101 Oscilloscope. Model 7854 combines capabilities of conventional oscilloscope with microprocessor-based waveform processing allowing digital storage and waveform computations; optional memory stores up to 40 waveforms. Tektronix
100-ml flasks; low current consumption produces very low heat output necessary for incubators. B. Braun Instruments 108 LC columns. Zorbax trimethylsilane columns for reversed-phase and ion-pairing LC analysis produce rapid separations with good peak symmetry in highly aqueous mobile phase systems. Du Pont 109 Atomic absorption atomizer. IL655 Furnace Atomizer dries, pyrolyzes, and atomizes samples automatically providing detection limits about 1000 times better than flame atomizers. Instrumentation Laboratory
102 Buret. Continuous feed electronic buret features digital display of volume and continuous and accurate delivery of 0.01 to 100 ml in 0.01-ml steps. Sanda
Plant equipment and instruments
103 pH electrode. Flat surface combination pH electrode can measure pH of solids such as foods, skin, and paper and viscous materials such as drilling mud, gels, and syrups. Sensorex
110 Compressor. Twin pinion centrifugal compressor with high efficiency, high head per stage, and packaged construction is alternative to conventional multistage centrifugal and positive displacement compressors. Turbonetics
104 AC voltage/current standard. Model 2558 is programable current/voltage calibrator with 0.08% accuracy; features output voltages from 1 mV to 1200 volts, currents from 1 milliamp to 60 amp. Yokogawa of America 105 Lyophilizer. Freeze Dryer-8 has 8-liter capacity and can be coupled with variety of drying chambers, tray dryers, or 24-port manifold to suit specific application requirements. Labconco
111 Emulsions and dispersions processing. Model HS-2 Hydroshear utilizes efficient, fluid-shear processing chamber containing no moving parts for low-energy processing of emulsions and dispersions. Gaulin 112 Particle size analyzer. Solid state and computerbased, Model 7991-2 provides 12 channels of distribution data for particles ranging in size from 22 to 1000 micrometers; each analysis requires less than 1 minute. Microtrac
106 Digital thermometers. Pocket-sized and batteryoperated thermometer systems use platinum sensors and low-mass probes for temperature measurements f r o m - 2 0 0 ° to 1000° F and from - 1 0 0 ° to 550° C. Wahl Instruments
113 Elemental analyzer. Minilab 700 is portable, x-ray fluorescence spectrometer for on-site nondestructive analysis of wide range of materials. Columbia Scientific
107 Shaker. Model TU-1 provides rotary or reciprocating shaking for up to 70
114 Vacuum pumps. Rotary vane, 2-stage vacuum pumps provide ultimate pres-
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C&EN March 24, 1980
sure of 3 X 1 0 " 4 t o r r in displacements ranging from 62.5 to 400 liters per minute. Tekmar
cluding physical, electrical, and aging resistance properties. NL Chemicals
115 Refractometer. Hand refractometer reads 0 to 10% Brix in 0.1 % increments for testing low solids concentrations in liquids. National Instrument
123 Instrumentation. Catalog describes product line of precision balances, including microprocessor-controlled units, automated wet chemical analysis systems, and thermal analysis equipment. Mettler
116 Visible emissions monitor. Model D-R280AV uses double-pass optical system to measure stack gas opacity; features automatic zero and span calibration, air purge system, remote digital readout, and alarm system. Environmental Data
124 Crystallization equipment. Brochure describes draft tube, forced circulation, batch vacuum, and surfacecooled crystallizers including advantages and operation of each. Swenson
117 Teflon pump. Noncorrosive diaphragm pump is constructed of solid Teflon and is resistant to acids, bases, solvents, and abrasive slurries with up to 5/8inch solids. American Pump
Literature 118 Carbon and graphite parts. Booklet discusses machined carbon and graphite parts for variety of applications. Airco 119 Power supplies. Catalog describes line of high-voltage power supplies, including information on solidstate, regulated and unregulated, miniature, and modular units. Spellman 120 Process and environmental instrumentation. Product guide lists instruments for process analytical and control applications, air and water monitoring, and emissions monitoring. Beckman 121 Cooling water biocide. Technical paper discusses use of BromiCide, a microbiocide for control of slime, algae, and bacteria in recirculating cooling water towers. Western Chemical 122 Urethane. Series of technical data sheets discuss polyurethane systems for electrical potting and encapsulation applications in-
125 Glass and quartz tubing. Catalog 801 covers precision-bore glass and quartz tubing product line including descriptions of industrial applications. Wilmad Glass 126 Silicones. Brochure describes energy-saving potential of silicones, emphasizing short- and long-term savings when used in a variety of applications. Dow-Corning
Chemicals and materials 127 Optical fiber. High-temperature Fiber Optic operates for extended periods of time at temperatures up to 650° C and has numerical aperture of 0.36 nominal and acceptance cone of 4 4 ° . Dolan-Jenner 128 Synthetic lubricant. Syn-Lube HD is synthetic lubricant for heavy-duty machining and grinding operations; contains no phenolics, nitrites, nitrates, or chromâtes. Magnus 129 Gas standards. NBS traceable gas mixtures meet EPA traceability protocol for calibration of continuous monitors of gaseous pollutants such as sulfur dioxide. Matheson
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