Can Your Gas Suppliers Match Our Performance! in High-Pressure Cylinders •
calibration
standards
made to order in cylinders con taining from 10 to 200 cubic feet— 1 to 20 trace or minor components —parts per billion to percent con centrations—"make" tolerance ±10% and analysis accuracies from ± 5 % to ± 1 % of the component value •
carrier and zero gases
standard to highest purity—many gases purified for special applica tions, including use as major com ponents of calibration standards— pure air with total hydrocarbon content less than 0.1 p p m carbon
In Push-Button Cans •
unique, handy, low-cost gas mixtures
analyzed
for calibrating, evaluating or demon strating chromatographs and many more applications—36 single and multiple trace component mixtures of hydrocarbons, CO and CO2 in nitrogen, air and helium available from stock—nonstock mixtures available on special order—many technical advantages over highpressure cylinders •
c.p. grade gases
seven individual from stock
RSL
gases
available
SCOTT RESEARCH LABORATORIES, Inc.
Perkasie, Penna. (215) 249-3526
San Bernadino, California (714) 887-2571)
In addition . . . testing of motor vehicles and industrial pollution control devices. Manufactur ing of auto exhaust analysis and sampling systems, driver aid for dynamometer test driv ing and controlled atmosphere test chambers. Circle No. 167 on Readers' Service Card 152 A
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ANALYTICAL CHEMISTRY
MANUFACTURERS' LITERATURE
ENGELHARD
has Platinum labware for every purpose
Liquid Scintillation. Characteristics of ambient liquid scintillation counting are described in application data sheet number NI-8104. Potential problems and their solutions are discussed, as well as simplified methods of cocktail prepa ration and the advantages of room-tem perature operation over refrigerated systems. Beckman Scientific and Proc ess Instruments Division, 2500 Harbor Blvd., Fullerton, Calif. 92634 601 Nuclear
Teaching
Equipment.
Engelhard is constantly updating its platinum, iridium and rhodium lab ware to keep up with technological advances—offering you the most complete selection of lab ware, and also the most advanced.
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Take Engelhard Crucibles for example:
25-page laboratory guide on the Educa tor Series modular nuclear teaching in struments describes over 20 instru ments and many experiments. These AEC-compatible instruments include preamplifiers, pulse-shaping amplifiers, single channel pulse height analyzers, timing discriminators, and coincidence units. Canberra Industries, 50 Silver St., Middletown, Conn. 602
Standard form crucibles—have an Engelhard exclusive... All are hand hammered minimizing fatigue and stress cracking.
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Polygon form—have flat gripping surfaces for more secure nano7/ng...have built-in pouring spouts and flat bottoms.
Gas Chromatography. A 16-page price list of this company's gas chroma tography systems, accessories, and supplies lists order numbers, quantities, and prices for more than 325 items. Specify Bulletin 410P. Packard In strument Co., Inc., 2200 Warrenville Rd., Downers Grove, 111. 60515 603
Trilay® constructionis a new platinum metal composite material for crucibles. It inhibits formation of large crystalscrucibles last longer and are stiffer and easier to clean.
Infrared Spectrometry. Data Sheet 023 describes the use of KBr, TlBr, and Csl as pressed pellet powders for solid phase infrared spectrometry and lists prices for the powders. Harshaw Chemical Co., 1945 E. 97 St., Cleve land, Ohio 44106 604
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LDH Electrophoresis. The procedure for separation and staining of LDH electrophoresis is the subject of Techni cal Bulletin 144. Detailed information on amounts and types of reagents and stains is given in this booklet. E-C Ap paratus Corp., 222 S. 40 St., Philadel phia, Pa. 19104 605 Infrared Accessories. Heated and Pyrex gas cells are featured in Bulletin 7000-62 which presents infrared gas sampling accessories manufactured by this company's London subsidiary. Beckman Scientific and Process Instru ments Division, 2500 Harbor Blvd., Fullerton, Calif. 92634 606
Platinum 3'/4% Rhodiumrecommended for high temperature fusions and ignitions.
Pure Iridium and Pure Rhodium Crucibles —suggested for melting and other high temperature applications where platinum or platinum alloys cannot be used.
Other Engelhard platinum implements and equipment for the laboratory include: dishes, beakers, trays, tongs, and special apparatus to order. For complete information, including catalog and data sheets, write Baker Platinum Division.
ENGELHARD I
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BAKER P L A T I N U M
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DIVISION
113 Astor Street, Newark. New Jersey 0 7 1 1 4
Circle Na. 130 on Readers' Service Card
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