MANUFACTURERS' LITERATURE Operational Amplifiers. A β-page foldout short-form catalog gives full speci fications and brief application sugges tions for the company's 12 most widely used op amps. Analog Devices, Inc., 221 Fifth St., Cambridge, Mass. 02142 601 Ovens, Furnaces, Cold Rooms.
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6-page bulletin presents representative models of the company's entire line of humidity chambers, ovens, furnaces, walk-in incubator rooms, and walk-in cold rooms. Hotpack Corp., 5004 Cottman Ave., Philadelphia, Pa. 19135 602
free brochure outlines 8 8 applications for new thermal analysis system Carle's new approach to thermal analysis provides a unique solution for characterizing high molecular weight organic mixtures. Reflecting the volatility and thermal decomposition patterns of a sample's organic constituents, this technique achieves results previously impossible with conventional mass spectrometry, absorption spectroscopy, gas chro matography, and thermogravimetry. Applications range from fundamental research in organic and polymer chemistry to routine quality control and testing. Specific data developed by this new analytical technique includes volatility patterns, quantitative determination of minor components, thermal degradation patterns in inert and reactive atmospheres, vapor pressure measurements, and thermal stability of organic materials designed for high temperature applications. A new twelve-page brochure outlines eighty-eight potential usages covering such fields of interest as: • Aerospace · Electronic Components * Polymers " Air Pollution · Explosives * Rubber • Biomedical · Food * Solid Fuels " Container & Packaging · Food Chemistry · Textiles Materials · Pesticides · Water • Chemical Manufacture · Petroleum Analysis The significance of actual thermograms from these fields are discussed. Also included are complete specifications on this new instrument, the Carle Model 3000 Thermal Analysis System. Write today for your free copy.
CARLE INSTRUMENTS, INC. 1141 East Ash Avenue · Fullerton, California 92631
(714) 879-9900
Circle No. 27 on Readers' Service Card
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ANALYTICAL CHEMISTRY, VOL. 42, NO. 9, AUGUST 1970
Precoated TLC Plates. An 8-page cat alog describes the company's entire line of thin layer chromatography Uniplate and prescored Uniplates. Common ad sorbents are listed, and details of pack aging techniques are given. Analtech, Inc., 100 S. Justison St., Wilmington, Del. 19801 603 Miniature A/D System. Two pages picture, describe, and give detailed specifications of a miniature analog-todigital system, ΜΟΡΟ 301. Schock Electro-Optics, Inc., 1875 Massachu setts Ave., Cambridge, Mass. 02140 604 Power Supplies. Catalog B-703, 68 pages, provides comprehensive data on the company's modules, high-voltage power supplies, high-speed units, gen eral- and special-purpose supplies, and programming accessories. Twelve pages of applications notes and glos sary are included. Kepco, Inc., 131-38 Sanford, Ave., Flushing, Ν. Υ. 11352 605 D/A Converters. A 4-page foldout data sheet describes two D/A con verters with 15-bit resolution (1 part in 32,000), designated DAC-15RF and DAC-15RS. Analog Devices, Pastoriza Div., 221 Fifth St., Cambridge, Mass. 02142 606 Optical Reference Manual and Cata log. A 94-page booklet presents com plet* descriptions and ordering infor mation on Optical Industries' lenses, prisms, filters, beamsplitters, and pre cision instruments. The reference sec tion presents a wide selection of con version tables, optical formulas, and technical definitions. Optical Indus tries, 1218 E. Pomona, Santa Ana, Calif. 92707 607
Manufacturers' Literature
Analytical Standard Chemicals. Bul letin 111, 4 pages, lists 46 analytical standard kits containing alcohols, amines, ketones, pesticides, hydrocar bons, phenols, sulfur compounds, fatty acids, and methyl esters. Kits are de signed for instrument calibration. PolyScience Corp., 2101 Dempster St., Evanston, 111. 60201 608 High Temperature Metallography.
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6-page folder describes and pictures the research console installation "Vacuthermat." This system combines a hightemperature heating stage with a metallograph and a high-vacuum pump system. Hacker Instruments, Inc., P.O. Box 646, West Caldwell, N. J. 07006 609
Right? Right. W a n t t h e right c l a m p f o r e v e r y laboratory need? The Precision line PRECISJON features clamps for every purpose, designed for strength, durability and corrosion-resistance. Also unique SCIENTIFIC LAB-FRAMES» and accessories. Ask your Precision Scientific Dealer or write us for full-line Bulletin 641. Precision Scientific Company, 3737 W. Cortland St., Chicago, III. 60647.
Ir Micro Solid Sampling. Sixteen pages detail the use of AgCl encap sulation for direct analysis of micro quantities of reactive materials or those that sublime in the heat of the ir beam. Included are spectra and photos. Barnes Engineering Co., 30 Commerce Pal., Stamford, Conn. 06902 610 Environmental
Control
Chambers.
Bulletin IB-70, 6 pages, describes and illustrates representative models of the company's humidity chambers, ovens, furnaces, walk-in incubators, and cold rooms. Hotpack Corp., 5004 Cottman Ave., Philadelphia, Pa. 19135 611 Ultra-Pure Chemicals. A new 1970 catalog lists some 800 ultrapure metals and salts with purities ranging up to 99.99995% and VacDep materials for thin-film or vacuum deposition. Apache Chemicals, P.O. Box 17, Rockford, 111. 61105 612
1920-GoldenAnniversary οf Service to Science~1970 Circle No. 86 on Readers' Service Card
NEW NIM MULTICHANNEL ANALYZER
Uv/Vis
Spectrophotometer.
An
8-
page illustrated brochure describes a variety of accessories to be used with the Model 402 ultraviolet/visible spec trophotometer. Perkin-Elmer Corp., Main Ave., Norwalk, Conn. 06852 615
1 0 0 0 Channel A D C
•
2 0 0 or 4 0 0 Channel Memory
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Analytical Services. A new book fully describes the company's extensive fa cilities for the analysis of materials. Modern instrumental techniques are emphasized. Johnson Matthey Chem icals, Ltd., 74 Hatton Garden, London, England. 613 Data Transfer System. Three sheets describe the specific characteristics of the DGC-300 data transfer system, give a typical application, and explain the company's quality assurance pro cedures. Data Graphics Corp., 8402 Speedway Dr., San Antonio, Tex. 78230 614
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• • • • •
Easy to use — All D e c i m a l System — Self-explanatory Operation
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V e r s a t i l e — Add m o d u l e s for expansion of use
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Economical — Research Qual ity without costly "Frills"
•
R e l i a b l e — S a m e proven de sign of portable version
Student Labs Health Physics X-Ray Analysis Particle Analysis Detector Calibration
nuclear d i o d e s
inc.
P.O. box 1 3 5 , p r a i r i e v i e w , i i l i n o i s Phone:312-634-3870
60069
Telex 72
6407
Circle No. 81 on Readers' Service Card
ANALYTICAL CHEMISTRY, VOL. 42, NO. 9, AUGUST 1970
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Manufacturers'
SUPPLY CENTER
LABORATORY
1-Acetyl-2,3,5-tribenzoyl-/3-D-ribofuranose · Ally! Thiourea Aluminon · 4-Aminobenzonitrile · Aminocaproic Acid · Benzamide 2 , 3 - B u t a n e d i o n e M o n o x i m e · η-Butyl Bromide · Chalcone · Chloralose l-Chloro-2,2-dimethyl Propane · 1,3-Dichloropropene · Dimedone Dimethyl-p-phenylenediamine O x a l a t e · Disodium Phenyl Phosphate Dithiol · Glycolic A c i d · Inulin · M e n a d i o n e · M e t h y l A c e t a m i d e M e t h y l Formamide · n-Octyl-n-butyrate · iso-Propenyl Acetate R h o d a n i n e · Succinonitrile · T r i b r o m o p h e n o l • Urea Nitrate Write for list K-69 of other chemicals TWX: 710 988-5831
Tel: 201 696-1700
BOX K
1049 S. San Gabriel Blvd. San G a b r i e l . California 91776 (213) 287-0926
LAB WAR Ε Test tubes, flasks, beakers, dishes, joints, seals, stop cocks, quartz-to-metal APPARATUS
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Metallographic Equipment. The com plete line of Struers' metallographic equipment is given in a specification/ price list, 20 pages. Vickers Instru ments, Inc., 15 Waite Ct., Maiden, Mass. 02148 617 Optical Test Instruments and Data Systems. Technical brochures on dig ital measurements of radiation and differential temperature from the far ir to the uv are available. Equipment operates with or without automatic on line data processing calculator. Cintra, Inc., 440 Logue Ave., Dept. R, Moun tain View, Calif. 94040 618 Direct-Reading V a c u u m Spectrometer.
Lollotte Chemical Chattartown, Maryland 21620
Fabrication or repairs quickly made per your drawings or instructions
CATALOG
GC-MS
WEST COAST TECHNICAL SERVICE
Rods, tubes, plates, discs, ingots
FREE
PEQUANNOCK, N. I.
ANALYTICAL SERVICES MASS SPECTROMETRY SAS CHROMATOGRAPHY—COMBINED INFRARED SPECTROPHOTOMETRY THERMAL ANALYSIS—DTA-TGA-DSC
STOCK
R a m a n Spectroscopy Bibliography.
58-page bibliography of Raman spec troscopy publications (1968-69) con tains over 500 listings covering general techniques and applications. SpectraPhysics, Inc., 1250 West Middlefield Rd., Mountain View, Calif. 94040 616
Zip Code 07440
EASTERN CHEMICAL CORPORATION
SU! QUARTZ
Literature
Manufacturers of chemical testing equipment and accessories since 1919
Write Dapt. AC for fraa catalog
I
An 8-page bulletin describes a new compact direct-reading vacuum spec trometer for fast, accurate prepour analysis. The new unit has a wave length coverage of 1688 to 5000 A. Fisher Scientific Co., 590 Lincoln St., Waltham, Mass. 02154 619
QUARTZ SCIENTIFIC, INC. 34602 Lakeland Blvd. Eaitlake, Ohio 44094
989 Commercial St. Palo Ulto, Calif 94303
CABLE A D D R E S S :
Company Periodicals
PROMPT
SACTEX
SHIPMENT
POLAROGRAPHIC SPECIALTIES Quaternary ammonium compounds. Highly purified salts and solutions. Cells designed for use above -2.0 volts. SOUTHWESTERN ANALYTICAL
CHEMICALS
BOX 4 8 5 ARÎA 5 1 2
AUSTIN. TEX 444-3626
—literature on request
now even better for Fluoride
AMADAC-F Convenience-packaged mixture of lanthanum chelate of 3-aminomethylalizarin-NN-diacetic acid, buffers and stabilizers, affords accurate, sensitive and convenient quantitative colonmetric method for fluoride. 50 g. (for 100 detns.), with bibliography and complete instructions $15
BURDICK & JACKSON LABORATORIES, INC. 616 7222310 MUSKEGON. MICHIGAN
80 A .
49442
MASS SPECTROMETRY ANALYSIS Thin films-solid state materials. Bulk and trace analysis of all solid materials. Concentration gradients of diffused impurities. Resolution 5000. Sensitivity to parts per billion. GCA Technology Division, division of GCA Cor poration, Bedford, Mass., Tel. (617) 275-9000. Attn: Director of Marketing rfflWiffgufflffffffffi
Clayton
INTERNATIONAL
ENVIRONMENTAL CONSULTANTS
Est. 1954 Quai ι tied engineers ana scientists wun expertise in air, water, noise and solid wastes up to and in cluding turn-key installations. Complete in-house chemical and physical laboratories. GEORGE D. CLAYTON & A S S O C , I N C . 257Π Southfield Rd.. Southfield, Michigan 48075 A subsidiary of Sitkin Smelting & Refining. Inc.
ANALYTICAL CHEMISTRY, VOL. 4 2 , NO. 9, AUGUST 1 9 7 0
Requests for copies of the following publications should be sent directly to the address shown. Business or pro fessional letterheads are requested. CRS GC Newsletter. The May issue, 4 pages, describes several new products for gc, including a syringe cleaning solution, flame detector cleaning solu tion, colored column tags, and other items. Chemical Research Services, Inc., 14 Industrial Rd., Addison, 111. 60101 Via. Vol. 4, No. 2, 12 pages, is a spe cial biomedical/life sciences issue with a focus on instrumentation. Articles included are devoted to epr, electro magnets in biological research, com puter use in diagnostics for neurosur geons, the gc/MS as a life science tool and others. Varian, Analytical Instru ment Div., 611 Hansen Way, Palo Alto, Calif. 94303 TORBAL
Application
of t h e M o n t h .
This first in a series of newsletters, 2 pages, features an application of the Torbal torsion balance in the quality control laboratory of a food processing plant. Torsion Balance Co., 35 Monhegan St., Clifton, N. J. 07013
