A text that balances the analytical and practical approaches
MANUFACTURERS' LITERATURE Platinum vs. Quartz Thermometry.
A
6-page report gives a comparison of a popular system using a quartz ther mometer with a system using platinum thermometers. Items such as time re sponse, self-heating, resolution, linear ity, repeatability, and long-term sta bility are discussed. Doric Scientific, 7969 Engineer Rd., San Diego, Calif. 92111 601
Biomedical Dynograph Recorders.
A
28-page brochure covers the merits of direct-writing recorders in biomedical research and the different ways dis play methods can be used to obtain useful traces. Emphasized is the re corders' input-coupler concept. Beckman Instruments, Inc., 2500 Harbor Blvd., Fullerton, Calif. 92634 602
QUANTITATIVE CHEMICAL ANALYSIS Fourth Edition By I. M. Kolthoff, E. J. Meehan, and Ε. Β. Sandell, all of the University of Minnesota, and Stanley Bruckenstein, State University of New York at Buffalo This well-known text provides the student with both theo retical and practical insights into analytic chemistry, quanti tative analysis, and instrumental analysis. Each topic is introduced on an elementary level, carefully developed, and fortified with ample exercises. In the Fourth Edition, material on analytic separations has been expanded, as has that on physicochemical methods of analysis. In-depth cover age is given to electroanalytical and optical methods, and an unusual variety of gravimetric, volumetric, and other useful determinations are presented. The text describes common laboratory operations as well as individual determinations. 1969
1199 pages
$14.95
Write to the Faculty Service Desk for examination copies. Nuclear Catalog. A 1970 catalog, 136 pages, lists over 900 items including radiation detectors, laboratory and field instruments, medical and biological sys tems, and industrial equipment. Nu clear Enterprises, Ltd., Sighthill, Edin burgh 11, Scotland 603
T H E M A C M I L L A N COMPANY 866 Third Avenue, New York, New York 10022 In Canada, write to Collier-Macmillan Canada, Ltd., 1125B Leslie Street, Don Mills, Ontario Circle No. 30 on Readers' Service Card
Digital Data System. A 24-page bro chure on the H4200 digital data system describes in detail the new system which monitors and measures temperature, pressure, load, thrust, voltage, and re sistance directly in engineering units. The system will accept linear and non linear signals and will scan up to 1000 channels with 1000 individual limits. Howell Instruments, Inc., 3479 W. Vickery Blvd., Fort Worth, Tex. 76107 604 Image-Splitting Eyepiece. An 8-page brochure presents information on the A.E.I, image-splitting eyepiece and ad justable gauging unit for microscopes. The optical and mechanical system, principle of measurement, applications, and references are included. Vickers Instruments, Inc., 15 Waite Ct., Mai den, Mass. 02148 605 Hydrocarbon Pesticides in Water. De termination of chlorinated hydrocar bon pesticides in water is the subject of an 8-page applications bulletin. The procedure uses the Fisher/Victoreen gas chromatograph. Fisher Scientific Co., 312 Fisher Bldg., Pittsburgh, Pa. 15219 606
To avoid hurting your product's feelings: Look at its viscosity the way other people do, from Detroit to Djakarta. Your up and coming material would no sooner enter a strange plant without Brookfield credentials than you'd show up at the pool without your trunks. Send for our catalog of Brookfield lab or process viscometers today. Put out a happier product, tomorrow.
Brookfield
ENGINEERING LABORATORIES, INC. Stoughton 24, Massachusetts Circle No. 13 on Readers' Service Card
ANALYTICAL CHEMISTRY, VOL. 42, NO. 3, MARCH 1970
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Manufacturers' Literature
Temperature Control. A single sheet describes the Type 500 Temcometer. This percentage-type controller pre cisely controls the electrical input to furnaces and other electrical devices such as heating mantles, flask heaters, and water baths. Thermolyne Corp., 2555 Kerper Blvd., Dubuque, Iowa 52001 607 Torsion
Analytical
Balances.
Multichannel Analyzer. A 4-page bul letin introduces the Spectrazoom, an instrument which can be used as a conventional pulse-height analyzer or as a multiscaler. It has an 8-MHz analog-to-digital converter combined with a memory cycle time of less than 8 /usee. Packard Instrument Co., Inc., 2200 Warrenville Rd., Downers Grove, 111. 60515 610
Two
pages describe and picture three mod els of Torbal electronic analytical bal ances. Features of these balances that reduce maintenance, increase accuracy, and facilitate weighings are explained. The Torsion Balance Co., 35 Monhegan St., Clifton, N. J. 07013 608 Accelerators and Neutron Generators.
A short-form catalog includes descrip tions and photos of several types of ac celerators and neutron generators. Also included are tables for neutron output characterization, principal uses, physi cal dimensions, installation parameters, and system design characteristics. Kaman Nuclear, 1700 Garden of the Gods Rd., Colorado Springs, Colo. 80907 609
Time-Sharing Instrumentation Termi nal. On-line operation of the 2547A coupler with laboratory instruments, such as digital voltmeters, counters, and nuclear scalers, is discussed in a 4-page applications bulletin. Inquiries Manager, Hewlett-Packard Co., 1501 Page Mill Rd., Palo Alto, Calif. 94304 611 Chromatography Supplies. Catalog 13, 1970, lists supplies for gas chroma tography and thin layer chromatog raphy, lipids, radiochemicals, reagents, and includes an index to biochemicals and a general index plus ordering in formation. Applied Science Labora tories, Inc., P.O. Box 440, State Col lege, Pa, 16801 612
Series Scalers. Data Sheet 104, 4 pages, presented the NS-30 Series sealer/timers. The instruments, appli cations, and specifications are described. These systems are modular and per mit maximum flexibility. Harshaw Chemical Co., Div. Kewanee Oil Co., 6801 Cochran Rd., Solon, Ohio 44139 613 Chemical Clothing. A brochure illus trates, gives recommendations, and de scribes safety clothing. Jamac Prod ucts, Inc., Warrington, Pa. 18976 614 Thin Layer Chromatography Bibliog raphy. Twenty-eight looseleaf pages list references which mention use of Eastman Chromagram sheet and de veloping apparatus. Included is a table of contents. Eastman Kodak Co., Rochester, Ν. Υ. 14650 615 Laboratory Press. A 4-page, 2-color brochure describes a new 30-ton hy draulic laboratory press. The press de livers up to 30 tons of force in just a few strokes of a hand pump. Greenerd Press & Machine Co., Inc., 41 Crown St., Nashua, Ν. Η. 03060 616
ADSORPTION FROM AQUEOUS SOLUTION
tailors photomultipliers your s p e c s This 9-stage, 1 / 2 " diameter photomultiplier series, a l t h o u g h t i n y , equals p e r f o r m a n c e of c o n v e n t i o n a l s t a n d a r d size t u b e s . R300 Miniaturized version of 1P28 with UV transmitting glass. S-5 spectral response. R303 Miniaturized version of R213 with UV transmitting glass. 1850 to 8000 Λ spectral response. R306 Miniaturized, version of R106 with fused silica window having S-19 spectral response. R427 Miniaturized with Cs-Te photocathode having solar blind characteristics similar R166. 1600 to 32000 Â spectral response. OUR PRODUCTS Phototubes m Photomultiplier
ADVANCES IN CHEMISTRY SERIES NO. 79 Fifteen papers from a symposium by the Division of Water, Air, and Waste Chemistry and the Division of Colloid Chemistry of the American Chemical Society, chaired by Walter J. Weber, Jr. and Egon Matijevic. The papers in this volume deal with many of the questions and problems relating to adsorption from aqueous solution, as well as general discussions of thermodynamic and kinetic aspects of adsorption phenomena. The papers include descriptions of the results of studies on a variety of adsorbate-adsorbent systems. 212 pages with index
(1968)
Postpaid in U.S. and Canada; plus 30 cents elsewhere. Free set of L. C. cards with library orders upon request.
Tubes • Photocanductive cells · Special Vidicons
H A M A M A T S U T V CO., LTD. 1126 Ichino-chc, H a m a m a t s u c i t y , Japan. Telex: 4225-185 Japan Cable: HAMA TV HAMAMATSU JAPAN
Circle No. 66 on Readers' Service Card 120 A ·
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ANALYTICAL CHEMISTRY, VOL. 42, NO. 3, MARCH 1970
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SPECIAL ISSUES SALES AMERICAN CHEMICAL SOCIETY 1155 SIXTEENTH ST., N.W. WASHINGTON, D.C. 20036
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Manufacturers' Literature Double Spectrometer. Eight pages are devoted to specifications and illustrations of the 1401 double monochromator-spectrometer. This double CzernyTurner mount with two-gauged gratings, is designed primarily to minimize scattered light and permit the detection of weak spectra. Spex Industries, Inc., P. 0. Box 798, Metuchen, N. J. 08840 617
Infrared Polyethylene Cells. A 6-page booklet "Beyond NaCl" details and illustrates how to secure strong spectra beyond 650 cm - 1 with linear polyethylene cells. These cells come in nine different pathlengths from 0.1 mm to 10.0 mm with corresponding volumes of 0.036 to 3.60 ml. Barnes Engineering Co., 30 Commerce Rd., Stamford, Conn. 06902 620
Thermocouple Catalog. This 1970 catalog, 36 pages, contains technical and price information on thermocouples, probes, bare wire, insulated wire, miniature connectors, panel boards, ceramic insulators, cold junction compensators, ice point reference chambers, portable pyrometers, and related items. Omega Engineering, Inc., Box 4047, Stamford, Conn. 06907 618
Recorders. Bulletin 657, 4 pages, with photographs and schematic drawings, describes the company's complete line of pressure-fluid direct-writing recorders. The "S" Series Dynograph recorders have applications in the laboratory, telemetry, and educational and industrial recording fields. Beckman Instruments, Inc., 3900 River Rd., Schiller Park, 111. 60176 621
X-Ray Equipment. A 2-color, 6-page brochure describes the company's complete line of X-ray diffraction and spectroscopy equipment. Included are charts, diagrams, photographs, and specifications. Siemens Corp., 186 Wood Ave. S., Iselin, N. J. 08830 619
Recording Oscillograph. A 12-page brochure, Catalog D2013, describes improvements in the new direct-write, ultraviolet Model 1508A Visicorder over the earlier 1508 Models. Honeywell Test Instruments Division, P. O. Box 5227, Denver, Colo. 80217 622
Mass Spectrometry m Inorganic Chemistry
Neutron Generator Specifications. Five pages describe the specifications of the A-711 neutron generator. The specifications include guaranteed neutron output, operating parameters, power and shielding requirements, and system dimensions. Kaman Nuclear, 1700 Garden of the Gods Rd., Colorado Spring, Colo. S0907 623
Instrumentation Recorder. Brochure D119, a 6-page folder, describes the company's PR-500 portable or rackmounted instrumentation recorder. A flow chart describing a typical system and a description of accessories are included. Ampcx Corp., 401 Broadway, Redwood City, Calif. 94063 624
Precision DC Measurements. A 31page Application Note (AN 70) describes how to make precision dc measurements. Calibration techniques and problems in making such measurements are emphasized. Calibration terms, such as accuracy and repeatability, are clearly defined. Hewlett-Packard Co., 195 Page Mill Rd., Palo Alto, Calif. 94304 625
Mass Spectrometry in Inorganic Chemistry Advances in Chemistry Series No. 72 Twenty-one papers from a symposium by the Division of Inorganic Chemistry of the American Chemical Society, chaired by John L. Margrave. The mass spectrometer has become a basic tool for chemical manipulations and is no longer just an analytical instrument. New techniques for mass analysis, new designs for sampling, and new electronic accessories have raised the mass spectrometer to its present position of prime importance in chemical research.
329 pages with index
Cloth
(1968)
Postpaid in U.S. and Canada; plus 30 cents elsewhere. AOifAfee*!» '*) C f i f M i g l f t ï SESÎfS
72
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122 A · ANALYTICAL CHEMISTRY, VOL. 42, NO. 3, MARCH 1970
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How do you get the highest resolution consistently in ion exchange chromatography?
Manufacturers' Literature
Jet Sensor. A 2-page illustrated data sheet, FAD-397, describes a fluidic interruptible jet sensor. This device de tects the presence of an object passing between two opposing jets. Corning Glass Works, Corning, Ν. Υ. 14830 626
Incubator Catalog. A 20-page incuba tor catalog, ICB-69, fully describes and illustrates the company's complete line of incubators and includes full specifi cations, performance data, and ordering information. Hotpack Corp., 5004 Cottman Ave., Philadelphia·, Pa. 19135 627 Laboratory Furniture Catalog. Twelve pages illustrate how more than 200 GF modular units can be combined into an unlimited number of assemblies for laboratories of any size. Actual instal lation photographs and schematic dia grams give details. General Fircproofing Co., E. Dennick Ave., Youngstown, Ohio 44501 628 Laboratory Seating Accessories.
An
8-page catalog illustrates and describes a complete line of Contempra labora tory stools, chairs, and seating acces sories. All have been "biomechanical engineered" for maximum comfort. Fisher Scientific Co., 312 Fisher Bldg., Pittsburgh, Pa. 15219 629
Only by using Bio-Rad AG resins! BIO-RAD AG resins represent the highest level of purity available for ion exchange chromatography. AG resins are exhaustively purified and sized to specific ranges to assure sharp resolution and highest reproducibility. For example, the maximum iron con tent in AG-1 anion resin is 0.00005%. For the full story on BIO-RAD and its role in ion exchange technology—in cluding valuable data on Bio-Rex resins, specialty resins, resin selection, regeneration and applications — send for our general catalog, Price List U.
BIO-RAD Laboratories Dept. A-6 · 32nd and Griffin Ave. Richmond, California 94804 Circle No. 76 on Readers' Service Card
Microliter Syringes. A 4-page bulletin describes the company's microliter sy ringes. These syringes come in four basic types: fixed needle, fixed needle with guide bar, interchangeable needle, and interchangeable needle with guide bar. Shandon Scientific Co., Inc., 515 Broad St., Sewickley, Pa. 15143 630
M=g
RT PV
Determine molecular weights in five minutes. How? E a s y . . . Use the new Finnigan Model 2000 Molecular Weight Analyzer. Your most inexpe rienced lab technician can do a molecular weight determination of liquids and gases between mass 15 and 400 with up to 1% accuracy in five minutes or less. Based upon the ideal gas law, the Model 2000 accurately measures the pressure produced by a weighed quantity of sample at constant temperature and volume. The most difficult task is weighing the sample! Simple to use. Plug the Model 2000 into a l l O volt wall outlet, connect a vacuum line, calibrate it with some known compounds, and it's ready to use. Priced under $4,000. In short, we have taken the tinkering and perhaps the fun out of molecular weight and vapor pres sure measurements. From now on, it's just routine. Why not write us and ask for our brochure on the Finnigan Model 2000 Molecular Weight Analyzer.
Fast Fourier Transform System. A 16page booklet describes and gives in structions relating to the company's fast Fourier transform system. The sj-stem uses the Series 1070 signal aver aging computers. Fabri-Tek Instru ments, Inc., 995 Applegate Rd., Madi son, Wis. 53713 631 Laboratory Chemicals.
The new IT. S.
288-page edition of the BDH Labora tory Chemicals catalog covers a full range of laboratory reagents, biochemicals, indicator and test papers, chroma tography columns, density gradient ma terials, and cellulose ion exchangers. Gallard-Schlesinger Chemical Mfg. Corp., 584 Mineola Ave., Carle PL, L. Ι., Κ. Υ. 11514 632
finnigan FINNIGAN INSTRUMENTS CORPORATION
2631 Hanover Street, Palo Alto, California 94304 Circle No. 61 on Readers' Service Card
ANALYTICAL CHEMISTRY, VOL. 42, NO. 3, MARCH 1970
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Manufacturers' Literature Company Periodicals
Requests for copies of the following publications, catalogs, etc., should be sent directly to the address shown. Business or professional letterheads are requested. Current Laboratory Practice. Vol. 2, No. 1, 20 pages includes a description of the expansion of the company's medical and research laboratories in Ann Arbor, Mich. Other articles con sider electrophoresis, membrane filters, the company's short course, air pollu tion study, and new products. Gelman Instrument Co., P. O. Box 1448, Ann Arbor, Mich. 48106 Ramalogs. Vol. 2, No. 4, 4 pages, dis cusses the argon/krypton laser as a source for Ε aman spectroscopy. In cluded are figures and diagrams. Spex Industries, Inc., 3880 Park Ave., Metucheu, N. J. 08840
... automatically increases down slope sensitivity for each chromatographic peak Many modern electronic digital integrators will allow you to establish different sensitivities for leading and tailing edges of chromato graphic peaks. Only one does it automatically. Model 625 automatically increases d o w n slope sensitivity by a factor of 3 over the up slope sensitivity. And up slope sensitivity can also be increased automatically on a timeprogrammed basis during the run.That means you can g e t as much as a 48 to 1 increase in sensitivity b e t w e e n t h e leading edge of t h e first peak and t h e t a i l i n g edge of t h e last. A l l automatically. A d d its automatic baseline correction, audible overload alarm system and built-in printer, and you've got a digital integrator w i t h features no other can match at any price. A n d speaking of price— Model 625 costs only $3950. For c o m p l e t e i n f o r m a t i o n w r i t e f o r Bulletin 1122Q.
Packard
P A C K A R D I N S T R U M E N T COMPANY, INC. P A C K A R D I N S T R U M E N T I N T E R N A T I O N A L S.A. L T D . 2 2 0 0 WARRENVILLE ROAD · D O W N E H S GROVE, ILLINOIS 60515
SUBSIDIARIES
OF A M B A C
I N D U S T R I E S , IMC.
Model 625 is available an our equipment lease plan. Write for details. Circle No. 142 on Readers' Service Card
126 A
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ANALYTICAL CHEMISTRY, VOL. 42, NO. 3, MARCH 1970
Geophysics Newsletter. Vol. 1, No. 1, 4 pages, is the first in a series designed to keep the geophysicist aware of ad vances in his field and keep him ac quainted with the company's geophysi cal product line. This issue gives a magnetometer product recap plus other interesting information. Varian/AnaIvtical Instrument Div., 611 Hansen Way, Palo Alto, Calif. 94303 Fluorescence News. Vol. 4, No. 5, 12 pages, includes articles on protein struc ture and conformational changes; op eration without cuvets ; thin layer chro matography and fluorometry; four TLC scanner designs; and ends with a bibliography. American Instrument Co., Inc., 8030 Georgia Ave., Silver Spring, Md. 20910 Clinical Chemistry Newsletter.
The
first edition of a new 26-page quarterly on clinical chemistry contains staffwritten articles describing advances in technical instrumentation in the field of clinical chemistry. Perkin-Elmer Corp., Main Ave., Norwalk, Conn. 06852 Engelhard Industries Technical Bulle tin. Vol. X, No. 3, includes an article entitled "Spectrographic Method for the Quantitative Determination of Twenty-Eight Elements in Palladium Sponge." The method described uses the dc arc technique. Engelhard Min erals & Chemicals Corp., 113 Astor St., Newark, N. J. 07114
