Manufacturers' Literature Optically active organic compounds,
14 p, specifications and prices of op tically active acids, amines, alcohols, and amino acids. Also described is the company's custom resolution service. Norse Laboratories. 805-963-7614 464 High-vacuum pumps, 8 p, data for eight new pumps sized from 20 l./sec to 900 l./sec; pressures as low as 1 X 1LV10 torr. Veeco Instruments, Inc. 516-681-8300 465 Liquid-scintillation application sup port activities, 4 p, services covered in clude sample preparation, sample/sol vent verification, special workshops on radioimmunoassay, etc. Nuclear Chi cago. 312-298-6600 466 Data recording, 8 p, CLC 472, de scribes the company's line of analog and digital recording instruments, pro grammable data acquisition systems, multipoint and event recorders. Esterline Angus. 317-244-7611 467 References, S-p folder lists nearly 150 references describing research studies on oxygen uptake and evolution with various company Clark-type polarographic oxygen electrodes. Yellow Springs Instrument Co. 513-767-7242 468
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Flame photometer, 4-p folder covers the Model 51 instrument for determi nation of sodium, potassium, and lith ium in serum and urine. Coleman In struments. 312-345-7500 469 Lab instruments, 16 p, lists with speci fications and illustrations electron mi croscopes, scanning microscopes, microanalyzers, nmr and other spectrome ters, diffractometers, chromatographs, and related analytical instruments. JEOL (USA), Inc." 201-272-8820 470 Application Notes
Dissolved oxygen analysis, Application Data 4383, 6 p., titled "Parts Per Bil lion Dissolved 0 2 in Boiler Water and in Salt Water in Desalination Process Measured by New Analyzer," explains the capability of Model 735X dissolved oxygen analyzer. Beckman Instru ments, Inc. 471 Grinding, 1-p note describes procedure for grinding carbon black; procedure is applicable to other hard materials. Geoscienee Instruments Corp. 472 Sampling effluent streams, 4-p bulle tin G3-B144 by J. E. Carr discusses how to obtain a reliable sample. Den ver Equipment Division 473
Analysis by Electrode A comprehensive, up-to-date survey of analytical methods using specific ion electrodes. • Over 200 Different Types Of Samples • Sample Preperation • Analytical Technique • Literature References Detailed specification on 27 different Orion chemical sensing electrodes. Ask for your free copy of the Orion Analytical Methods Guide.
ORION RESEARCH Cambridge, Massachusetts 02139 CIRCLE 156 ON READER SERVICE CARD ANALYTICAL CHEMISTRY, VOL. 4 4 , NO. 1 1 , SEPTEMBER 1 9 7 2
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