New Products
THE COMPLETE POTENTIOSTAT! The new PAR™ Potentiostat/Galvanostat provides more features, modes of operation and flexibility than ever before available. φ
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Equilibrium dialysis system provides ac curate determination of binding param eters (association constants K, thermo dynamics including free-energy change AG", enthalpy change AH", entropy change AS", binding sites n) as well as interactions between low-molecular ligands and biopolymers. Applications abound in the biological and pharma ceutical sciences. $1390. Kontron, Inc. 609-921-2080 417
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• Remote electrometer probe (mounted in signal cable) • 1 0 η Ω input impedance • Slewing rate: 10V//iS
• =elOO V compliance, 1 A max. • T w o independent, internal potential sources • High speed electronic potential switching
Plug-in modules provide m a x i m u m flexibility in readout. Positive feed back IR compensation, high current m e a s u r e m e n t and galvanostatic capabilities up to 1 A are available. The Model 173 replaces a potentiostat, two voltage sources and a current-measuring device. Price of the Model 173 is $2475 including p r o b e . Digital version, $2825. Current r e a d o u t module, $200. I-E converter, $675. 100 mA output ver sion less t h a n $2000. For more data, contact Princeton Applied Research Corp., Box 565, Princeton, N.J. 08540; t e l e p h o n e (609) 452-2111. PRINCETON APPLIED RESEARCH CORPORATION CIRCLE 1 4 9 O N READER SERVICE CARD
Rapid-scan "spectro-colorimeter" pro vides instant transmission display of the visible spectrum on an oscilloscope or recorder. Large or small specimens can be accommodated, and the unit can be used to make single-wavelength measurements. Wavelength range is 400 to 700 nm with accuracy of 25 nm; scanning frequency is 20/sec. Op tional accessories are available. $1900. Broomer Research Corp. 516249-1544 418
Model 635D double-beam uv/vis spec trophotometer features digital readout. Supported by a two-year warranty, the instrument includes the following ad vanced features: large accessible sample compartment; extra-wide sepa ration of sample and reference beams, four scan speeds, energy warning light, damping selector, and cell ejectors; and all solid state circuitry with plug-in boards and integral power supply. $4750. Varian Techtron. 415-9392400 419
Modular pulse generator has a repeti tion rate of 1 Hz to 50 MHz and delays and widths adjustable to 1 sec. Model 8010 provides output for TTL and ECL simultaneously and an output for the AEC NIM standard. $345. Berkeley Nucleonics Corp. 415-527-1121 4 2 0
Variable / p e e d
FLASH EVAPORATOR with
THERMO-LIFT Controlled Heating Bath
This model is equipped with a series wound motor and solid state control providing adjustable speed between 25 and 150 RPM. The Flash Evaporator assures high evaporation rate—without contaminating back-drip—of aqueous solutions, high boiling point solvents and other materials. An ideal source of heat is Buchler's Thermo-Lift which is a combination lift and temperature controlled water bath. The Thermo-Lift, which may be adjusted from 8" to 16" in height, is useful as a source of heat for rotary evaporators, for distillation procedures and for applications where flexibility in height is required.
BUCHLER INSTRUMENTS DIVISION NUCLEAR-CHICAGO CORP. Λ SUBSIDIARY OF G 0 [ SEARLE ] & CO 1327 SIXTEENTH STREET, FORT LEE, NEW JERSEY, 07024 W r i t e f o r T e c h n i c a l Bulletin CIRCLE 2 6 O N READER SERVICE CARD
ANALYTICAL CHEMISTRY, VOL. 44, NO. 3, MARCH 1972
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