for Simultaneous Concentration or Evaporation of Ten Samples in 10 to 20 Minutes
ROTARY EVAPO-MIX For the evaporation of multiple samples of solutions, the Buchler Rotary Evapo-Mix is indispensable. It evaporates directly from test tubes or centrifuge tubes and is suitable for evaporation of acids, bases and or ganic solvents. The Rotary Evapo-Mix is equipped with a temperature-con trolled water bath; it may be operated with an efficient water aspirator or mechanical pump. Another outstanding feature of the Rotary Evapo-Mix is the swirling ac tion in the test tubes which increases the surface exposed to vacuum thus increasing the speed of evaporation.
BUCHLER INSTRUMENTS DIVISION
BUCHLER INSTRUMENTS
NUCLEAR-CHICAGO CORP. A SUBSIDIARY OF G D fSEARLE | & CO
1327 SIXTEENTH STREET, FORT LEE, NEW JERSEY, 07024 Request Bulletin AC-3-2100A CIRCLE 59 ON READER SERVICE CARD
HIGH RESOLUTION MASS SPECTRA FOR DOLLARS INSTEAD OF THOUSANDS Are you typical of the chemist who needs high resolution mass spectral data, but cannot justify the expenditure of thousands of dollars for the equipment?
A high and low resolution MS-30 mass spectrometer with a combined gas chromatographic inlet is available to serve your needs. Solids, liquids, or gases—low molecular weight or high (up to 2400)— are easily and quickly analyzed. The gas chromatographic inlet facilitates the identification of minor impurities in foods, drugs, solvents, or other chemicals. Pesticides, drugs, or other foreign chemicals are easily and unambiguously identified in water, body fluids, soil, or agricultural products. Elemental compositions are determined from mass measurements with accuracies better than ten parts per million. You can now obtain mass spectral data from the most sophisticated instrumentation available—and a t reasonable prices. Results are totally computerized, leading to speed, accuracy, and con venience of the final output. Contact: Stephen R. Shrader, Ph. D.
SHRADER ANALYTICAL & Consulting Laboratory, Inc.
Booth 624 at the
23rd Pittsburgh Conference on Analytical Chemistry
3450 Lovett Ave. Detroit, Mich. 48210 (313) 825-5550
146 A
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CIRCLE 172 ON READER SERVICE CARD ANALYTICAL CHEMISTRY, VOL. 4 4 , NO. 2 , FEBRUARY 1 9 7 2
New Products INS-12 X-ray fluorescence spectrometer system consists of a dual-channel spec trometer, a circular gamma-ray source and primary X-ray emission targets, and a liquid-nitrogen cooled siliconlithium detector assembly. The source target assembly has two stages of ex citation. A radioactive source (Am241) emits gamma rays which excite the Κ X-rays of a selected target ma terial. These in turn excite X-rays from the sample. Both the radioactive gamma-ray source and the primary target have annular geometry. Direct and backscatter X-rays from the sample provide a ratio for calculating concen trations of identified elements. $3500. Elscint, Inc. (Israel). Princeton Applied Research, Inc. 609-452-2111 411 Process control unit for Differential I photometer permits the continuous measurement of microparticles with diameters as small as a few hundred nanometers in process fluid or air streams. The Differential I photometer is based on the use of laser light; the process control module is easily in stalled and removed on the standard instrument. A digital data interface is also available. $11,000 for pho tometer with module. Science Spec trum. 805-963-8605 412 Model 312 metering pump is a general purpose, precision laboratory instru ment which provides calibrated flow rates to 500 ml/hour at pressures to 200 psi. The desired flow rate can be dialed directly. $495. Instrumenta tion Specialties Co. 402-434-0231 4 1 3 C-44 simultaneous carbon/sulfur determinator determines these elements in steel, iron, nonferrous metals and in organic materials in less than 1 min. with simple push-button operation. The instrument is accurate to ± 0 . 0 0 4 or ± 1 % of carbon present, whichever is greater, and to ± 0 . 0 0 1 or ± 3 % of sulfur present, whichever is greater. The determinator combines electronic technology and two Luft-type nondispersive infrared detectors to measure C0 2 and S0 2 combustion products. Output is read directly in percent. $16,450. Laboratory Equipment Corp. 616-983-5533 414 Model 501 rapid-scanning spectrometer scans wavelength ranges between 2000 A and 14 μ from 800 times per sec down to twice per sec. The instru ment has a patented corner-mirror scan system which makes its perfor mance determined solely by signal/ noise. A modular plug-in design per mits range selection. OCLI. 203-8532224 415
