Kontron, Inc

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NOW AVAILABLE FOR U.S. LABS... KONTRON STRIP-CHART RECORDER

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Kontron's new strip-chart recorder, Model 1100, combines Swiss precision with the most advanced electronics. The unit is ideal for use in the analytical and biochemical lab, since it has 12 selected chart speeds plus six input ranges from 1 mv. Thus it is completely compatible with your spectrophotometer, gas chromatograph, fluorometer, atomic absorption instrument, etc. Lightweight and portable, the 1100 is designed with shielded compartments . . . separating input amplifier and ranging circuits . . . giving complete independence from line transients. Its pulse-driven I stepping motor and carefully developed chart feeding system assure precise timing and exact paper guidance. Accuracy is ± 0.25% ; reproducibility is better than . 1 % . Chart width is 250 mm. Full scale response time is .8 seconds. There is no mechanical backlash and the pen carrier accepts fiber, spring-loaded ballpoint, Leroy or Rapidograph pens. All standard and optional accessory modules can be plugged into the electronic circuit board. ask f o r demonstration CIRCLE

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KONTRON DIAPACK The Diapack is a new equilibrium dialysis system that both simplifies and speeds up the handling and accurate determination of binding parameters (association constants —K; thermodynamics including free energy — AG°, enthalpy — ΔΗ°, entropy changes — AS°; binding sites — n) as well as interactions between low molecular ligands and biopolymers. Because the Diapack is easy to use and speeds up analysis, it gives you more accurate results. The system is optimized in all parameters to allow equilibrium dialysis studies within two to five hours in multiple numbers of cells. Three cell options are available . . . macro, semi-micro and micro. All cell units are machined from Teflon to eliminate absorption. Five equalsized cells comprise one column. Up to four columns or 20 cells may be mounted in the system's rotation unit. Membranes are of .025mm regenerated cellulose. Cells are simple to assemble, load or withdraw. Direct transfer of samples to appropriate analytical equipment for analysis is easily accomplished.

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for additional information, write us at Kontron, Inc., Box 702, Princeton, N.J. 08540 in Europe, contact Kontron-Technik A.G., CH-8031, Zurich, Switzerland.

KONTRON

ANALYTICAL CHEMISTRY, VOL. 44, NO. 4, APRIL 1972

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