MANUFACTURERS' LITERATURE Digital pH Meters. Two compact dig ital pH meters are described in a 4page data folder, Bulletin SI-111-2. The instruments are the Model 111 general purpose pH meter with 4-digit readout and the Model 112 research pH meter with 5-digit readout. Corn ing Glass Works, Corning, Ν. Υ. 14830 601 Flowmeters. A bulletin describes Ideal flowmeters. Choice of float materials and various convenient scales and ta pers allow for a wide range of flow rates, 26,000 ml/min air flow, 320 ml/ min water flow. Accuracy is ± 2 % full scale. SMI Instruments, 480 Paterson Ave,, East Rutherford, N. J. 07073 602 Volatilization Rates of Lubricants. A 5-page reprint gives the new ASTM standard method for measuring the rates of volatilization of lubricants in a thermal-vacuum environment. The method uses the Calm recording vac uum microbalance. Calm Div., Ventron Instruments Corp., 7500 Jefferson St., Paramount, Calif. 90723 603
for measuring dynamic performance, and alerts the user to potential prob lems in applications. Analog Devices, Pastoriza Div., 221 Fifth St., Cam bridge, Mass. 02142 607 Digital Data Acquisition Systems. A 16-page brochure describes how to make measurements automatically. This basic exposition of digital data ac quisition systems explains how they can automatically measure temperature, pressure, force, strain, and other physi cal parameters. Vidar Corp., 77 Orte ga Ave., Mountain View, Calif. 94040 608
REAGENT CHEMICALS
Gas Chromatography Equipment. A 24-page catalog describes gas chroma tography systems, system modules, and accessories available from the com pany. HCL Scientific, Inc., P.O. Box 4223, Rockford, 111. 61110 609
Acetic
Laboratory Chemicals. A 55-page catalog lists some 2500 standardized chemicals, reagents, and testing solu tions. The firm markets its products under the "Banco" name. Anderson Laboratories, Inc., P.O. Box 1957, Fort Worth, Tex. 76101 610
IR Variable Pathlength Cell. Four pages discuss how to use variable pathlength cells to optimize infrared solvent compensation and differential analysis. Spectra illustrate how to compensate for solvent bands. Barnes Engineering Co., 30 Commerce Rd., Stamford, Conn. 06902 604
Contact Angle Meters. Eight pages describe and picture two models of re flective goniometer-type contract angle meters. Applications are also suggest ed. Industrial and Mill Supply Co., 21 Walt Whitman Rd., Huntington Sta tion, L.I., Ν. Υ. 11746 611
Pulsed Nmr Bibliography. Sixteen pages contain a selection of references from research fields to which pulsed nmr techniques have been used. In cluded arc the most recent publications in the field (1965-70), together with a list of comprehensive works on nmr which have supplied extensive refer ences to the early literature. Bruker Scientific, Inc., Cross Westchester In dustrial Park, Elmsford, Ν. Υ. 10523 605
Airless-Ware Catalog. A 28-page cat alog, AW-1, features Kem-Kits, compo nent parts, and accessories to complete ly equip a laboratory with apparatus used for working with air- and mois ture-sensitive highly reactive com pounds. Kontes Glass Co., Spruce St., Vineland, N. J. 0S360 612
Helium Purifiers. Two pages describe, picture, and give specifications and prices for two models of helium puri fiers. Matheson Gas Products, P.O. Box 85, East Rutherford, N. J. 07073 606 Digital-to-Analog Converters. A 4page technical paper is entitled "A Dissertation on Specifying, Measuring and Using Very High Speed Digital-toAnalog Converters." The article dis cusses some of the difficult-to-mcasure speed characteristics, suggests circuits
ORCO C
X-Ray Analysis Instruments. A 12-page bulletin, XS-300, details the operation of semiconductor X-ray de tector systems for scanning electron mi croscopes and microprobes. A separate section deals with diffraction analysis applications. Ortec, Inc., 200-A Mid land Rd., Oak Ridge, Tenn. 37830 613
ACIDS Sulfuric
Nitric Hydrochloric Perchloric Phosphoric
BASES Ammonium Hydroxide Potassium Hydroxide Sodium Hydroxide
SOLVENTS Analytical Electronic Spectrophotometry
ELECTRONIC CHEMICALS Dopants Epitaxials Acid Etches
STANDARD SOLUTIONS Volumetric Buffer Percentage
SPECIALTY REAGENT CHEMICALS Methoxides Sodium Biphenyl E.D.T.A.
CUSTOM CHEMICAL SYNTHESIS
CORCO Compressed Gas Safety Equipment Catalog. A 12-page catalog discusses safe practices including handling, oper ating, detecting, and metering equip ment designated for greater safety when working with compressed gases. Matheson Gas Products, P.O. Box 85, East Rutherford, N. J. 07073 614
CHEMICAL C O R P O R A T I O N Manufacturers of Reagent and Electronic Chemicals
Tyburn Road & C e d a r Lane, Fairless Hills, P a . 1 9 0 3 0
'Phone: (215) 295-5006 Circle No. 35 on Readers' Service Card
ANALYTICAL CHEMISTRY, VOL. 4 2 , NO. 8 , JULY 1 9 7 0 ·
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New toploading balance i s fast, a c c u r a t e . . . y e t RUGGED! New Torbal ET-1 toploader (160g capacity, 1 mg accuracy) makes accurate weighing easier and more foolproof than ever before. NEW EASE thanks to complete digital display without the use of optical projections or verniers to read, no estimating. NEW EASE because the one piece construction of the exclusive Torsion weighing mechanism has no knife edges to chip, wear or collect dust —hence there's no loss in accuracy. NEW EASE —thanks to the electronic null readout feature, the ET-1 is not affected by sensitivity changes —from temperature or humidity variations or effects of foreign matter or wear. As long as you can see the null needle move for a 1.0 mg weight change, then a difference of 1.0 mg in weight-reading means 1.0 mg — today, tomorrow, next month, next year. NEW EASE because the ET- l's Torsion mechanism is far less affected by vibration than optical balances. You can use an ET-1 in conditions other balances can't take. NEW EASE thanks to out-of-level accuracy. For minor changes in level of the ET-1, zero point does not change.
Pesticide Analysis by LC. "Analytical Liquid Chromatography: The Useful Approach to Pesticide Analysis," 16 pages, by D. Γ. Horgan, Jr., W. A. Dark, and K. J. Bombaugh is available on request. Technical Eeport No. 19531. Waters Associates, Inc., 61 Fountain St., Framingham, Mass. 01701 615 Radionuclides. A new 1970, 28-page radionuclide brochure lists over 90 ra dionuclides and features 9 new short lived nuclides, namely: barium-131, bromine-82, cesium-131, copper-64, gold-198, mercury-197, molybdenum99, potassium-32, and sodium-24. New England Nuclear, 575 Albany St., Bos ton, Mass. 02118 616
WRITE FOR FREE BROCHURE.
T H E T O R S I O N B A L A N C E C O M P A N Y Department A. Main Office and Factory, TORBAL Clifton. N. J.; Sales Offices: Birmingham, Ala.; Chicago, 111.; San Mateo, Cal.; Pittsburgh, Pa.; Plants and Offices in Montreal, Quebec, London, England and Waterford, Ireland. Circle No. 125 on Readers' Service Card
ISOTOPE EFFECTS IN CHEMICAL PROCESSES ADVANCES IN CHEMISTRY SERIES NO. 89 Thirteen p a p e r s from a s y m p o s i u m by t h e Division of Nuclear Chemistry a n d Technology of t h e American Chemical Society, chaired by William Spindel. Includes: •
S e p a r a t i n g isotopes by chemical e x c h a n g e , distillation, g a s chromatog raphy, electromigration, a n d photochemical p r o c e s s e s
•
Methods for fractionating isotopes of hydrogen, lithium, boron, carbon, a n d nitrogen
•
T h e r m o t r a n s p o r t in m o n a t o m i c and ionic liquids
•
Statistical-mechanical theory d e t e r m i n i n g isotope effects
2 7 8 p a g e s with index
Manufacturers' Literature
Clothbound
(1969)
Postpaid in U.S. a n d C a n a d a ; plus 3 0 c e n t s e l s e w h e r e . Free s e t of L. C. c a r d s with library o r d e r s u p o n r e q u e s t .
$13.00
Vacuum Measurement. A 24-page booklet, "So You Want to Measure Vacuum?" is subtitled "Much Ado About Nothing." This is a basic manu al for people involved with vacuum measurement. The Fredericks Co., Huntingdon Valley, Pa. 19006 617 Autolabware. A 100-page catalog il lustrates and describes the company's complete line of microglassware re placement components for automatic analyzers in both clinical and industrial laboratories. Gradko Glass Laborato ries, Inc., 1 Bridge St., Yonkers, Ν. Υ. 10705 618 Nmr and Epr Needs. A 40-page cata log, 5006-2, gives full information in cluding prices on glassware and ac cessories for nmr and epr spectroscopy. Wilmad Glass Co., Inc., U.S. Rt. 40 & Oak Rd., Buena, N. J. 08310 619 Laboratory Chemicals. A 456-page catalog, 700, lists thousands of chemi cals and products for the laboratory. Included in the catalog is a classifica tion by application/discipline of the company's line of laboratory chemicals and reagents. J. T. Baker Chemical Co, Phillipsburg, N. J. 08865 620 Dissolved Oxygen Electrode. Four pages give details of the measurement and control of dissolved oxygen with a new steam-sterilizable oxygen electrode. Three different systems are described. New Brunswick Scientific C o , Inc., 1130 Somerset St, New Brunswick, N. J. 08903 621
Order from: SPECIAL ISSUES SALES AMERICAN CHEMICAL SOCIETY 1 1 5 5 SIXTEENTH ST., N.W. WASHINGTON, D.C. 2 0 0 3 6
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ANALYTICAL CHEMISTRY, VOL. 42, NO. 8, JULY 1970
Water Analysis Equipment Directory.
A 28-page directory describes various types of analysis procedures as well as information on water analysis appara tus and reagents. LaMottc Chemical Products C o , Chesterton, Md. 21620 622
Manufacturers' Literature
Safety Products. SP-100, 8 pages, describes and illustrates 7 safety devices for the laboratory: 4 different types of safety shields; two over-temperature cutoffs for use with heated equipment, and a water-flow monitor for the protection of water-cooled equipment. Instruments for Research and Industry, 108 Franklin Ave., Cheltenham, Pa. 19012 623
Gamma Irradiators for Research. An 8-page brochure describes 4 gamma irradiators that need no shielding and three which provide outputs of from 500 rmm to 40,000 rmm and require a shielded room. Applications are also outlined. Atomic Energy of Canada, Ltd.—Commercial Products, P.O. Box 93, Ottawa, Canada 630
Analytical Instrument Catalog. The 1970 catalog, 12 pages, of analytical instruments describes the firm's line of nmr, epr, and mass spectrometers, as well as laboratory electromagnets, data processing systems, and geophysical instruments. Varian, 611 Hansen Way, Palo Alto, Calif. 94303 624
AC Line Conditioners. Four pages describe the company's ac line conditioners which provide pure ac power by eliminating high-speed line and load transients as well as all other forms of power line disturbance. These instruments feature response times 1000 times faster (typically 50 u.scc) than the fastest ac line regulator. Elgar Corp., 8159 Engineer Rd., San Diego, Calif. 92111 631
Hydrocarbon Analyzer. Bulletin 4104, 12 pages, fully describes the Model 400 hydrocarbon analyzer which is temperature-controlled and designed for both ambient air monitoring and vehicle emission studies. This is a flame ionization hydrocarbon system. Beckman Instruments, Inc., 2500 Harbor Blvd., Fullcrton, Calif. 92430 625 Ion, Electron, and Photon Detector. Application Xote JLI 605, 22 pages, titled, "Using the Focused Mesh Electron Multiplier as a Versatile Ion, Electron, and Photo Detector" introduces the focused mesh electron multiplier and explains what it can do and how to use it. Johnston Laboratories, Inc., 3 Industry Lane, Cockeysville, Md. 21030 626 Copper Beryllium Electron Multipliers. Application Note JLI-603 titled, "The Use of Copper Beryllium Electron Multipliers to Detect Ions, Neutral Particles, and Electrons and Photons," 14 pages, covers the subject with text, figures, and references. Johnston Laboratories, Inc., 3 Industry Lane, Cockeysville, Md. 21030 627
Safety Catalog. An 18-page catalog contains illustrations, descriptions, and prices of over 75 different products for the prevention and correction of various laboratory safety hazards. Matheson Scientific, 1850 Greenleaf Ave., Elk Grove Village, 111. 60007 632
NEW! OV-61 Stationary Phase! Another distinguished member of the OV family - the most thermally stable stationary phases for GC on the market today.
Refractive Index Accessory. Eight pages describe the refractive index accessory for the Grubb Parsons Fourier spectrometer. This instrument permits far ir studies on solids, liquids, and gases. Specifications for the spectrometer are included. Edwin Industries Corp., 11933 Tech R d , Silver Spring, Md. 20904 634 Light Source Catalog. Point xenon and mercury lamp sources from 75 W are described in a new catalog. Sources include lamp power supplies, housings, filter holders, filters, and focusing lens adapters. Also included is a deuterium lamp uv source and narrow line spectral lamps plus a miniature quartz prism monochromator. Oriel Optics Corp, 1 Market S t , Stamford, Conn. 06902 635
Séparation οί steroids on OV-61. Column: 6 ft. χ 4 mm I.D. glass U-tube packed with 3% OV-61 on 100/120 mesh GAS-CHROM Q. Column tempera ture: 270°C. Detector: Flame ionization at 1 χ 10-9 AFS. N 2 flow rate: 50 ml/min.
OV-61 is: • A 33%phenyl substituted silicone. • Intermediate in polarity between OV-1 and OV-17. • Stable up to 350°C.
Thermistor Temperature Sensing. Eight pages describe and illustrate thermistor probes for use with the company's thermometers and controllers, and similar equipment of other manufacture, for precise temperature measurement and control in medical, scientific, and industrial applications. Yellow Springs Instrument Co., Yellow Springs, Ohio 45387 628 Differential Refractometer. Four pages, Bulletin RI-70, present a schematic and specifications for a differential refractometer designed for continuous analysis of binary mixtures in process applications. Lockwood & McLorie, Inc., Horsham, Pa. 19044 629
GC Applications. Three pages give analysis requirements, chromatograms, and optimum conditions for triglyceride characterization with the Series 4400 chromatograph. Fisher Scientific Ltd., 8555 Devonshire Rd., Montreal 307, Quebec, Canada 633
Manufactured by Ohio Valley Specialty Chemical Co. P.O.BOX 241 MARIETTA, OHIO 4575θ'
OVSC
Distributed EXCLUSIVE!, Y by
Applied S c i e n c e Laboratories Inc. Write for prices.
Box
440 / State College, Pennsylvania Telephone 814-238-2406 Circle No. 6 on Readers' Service Card
16801
ANALYTICAL CHEMISTRY, VOL. 42, NO. 8, JULY 1970 ·
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CELL RECONDITIONING SERVICE CELL RECONDITIONING SERVICE
Manufacturers' Literature Organic Chemicals Catalog. An 8-page catalog of over 200 fine chemi cals includes silanes, deuterated sol vents, amidines, and derivatives of piperonal. T h e c o m p a n y capabilities in custom synthesis and small-scale pro cess development are also described. Marshallton Research Laboratories, Inc., Box 305, West Chester, P a . 19380 636 Electre-balance Catalog. An all-prod uct catalog, 16 pages, covers t h e com p a n y ' s electrobalances for scientific and engineering laboratory applica tions. Bulletin N o . 135. C a h n Div., Ventron I n s t r u m e n t s Corp., 7500 Jef ferson St., P a r a m o u n t , Calif. 90723 637 Instrumentation Catalog. T h e 1970 edition of t h e Honeywell I n s t r u m e n t a tion H a n d b o o k describes the division's line of electronic test instruments and customer services. F o r information on how to obtain the handbook, contact C. F . Creswell, Honeywell T e s t I n s t r u ments Div., P.O. Box 5227, Denver, Colo. 80217
C o m p a n y Periodicals Requests for copies of the following publications should be sent directly to the address shown. Business or pro fessional letterheads are requested. Gas-Chrom Newsletter. Vol. 11, No. 3, 4 pages, describes a column packing technique and contains information on pretested Adsorbosils, phenol separa tions, acetylation kits, and drug analy sis. Applied Science Laboratories, Inc., State College, Pa. 16801
CELL RECONDITIONING
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HAMAMATSU S c o r e s α N e w Mileston in P h o t o m u l t i p l i e r Tubes
Chromatography/Lipids. Vol. IV, N o . 2, 8 pages, features an article on b a r b i t u r a t e analysis. Other articles cover free fatty acid analysis, new m a terials and reagents available, n e u r a minic acid analysis, and miscellaneous information. Supelco, Inc., Bellefonte, P a . 16823 MPI Applications Notes. Vol. 5, N o . 2, 8 pages, discusses pulse polarograp h y : principles, instrumentation, inte grated circuitry, and analytical preci sion and sensitivity. McKee-Pedersen I n s t r u m e n t s , P . O . ' B o x 322, Danville, Calif. 94526 Current Laboratory Practice. Vol. 2, N o . 2, 16 pages, features an article on reproduction of Immunoelectrophoresis separations and includes a special sec tion on lipoprotein electrophoresis. Gelman I n s t r u m e n t Co., P.O. Box 1448, Ann Arbor, Mich. 48106
Our NEW side-on t y p e , R 4 4 6 , has multialkali p h o t o c a t h o d e , hysteresis-free and designed t o offer better d e t e c t i o n stability in an u n c o m p a r a b l e wide spectral response, ranging from 1 8 5 0 t o 8 6 0 0 Â. These really new characteristics include upgraded sensitivity in t h e 7 0 0 0 ~ 8 0 0 0 Â which enables y o u t o carry o u t advanced m e a s u r e m e n t in t h e red regions. A n d , is n o w ready for t h e highest-level applications in t h e various fields of p h o t o m e t r y . OUR PRODUCTS Phototubes •Photomultiplier
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