CHEMICALS REAGENTS MATERIALS

Cesium Chlor ide

A new cesium chloride is especially prepared for ultracentrifuge separation of macromolecules. It has an optical density of 0.06 at 260 πΐμ in a 60% aqueous solution, in contrast with previously available material with an optical density of about 0.70. Gallard-Schlesinger Chemical Mfg. Corp., 1001 Franklin Ave., Garden Citv, L. Ι., Ν. Υ.

501

Tin Radioisotope Tin-119m, a radioisotope with high

specific activity is newly available. It is widely used as a Mossbauer effect source, and the increased specific activity extends its usefulness in this application. Nuclear Science and Engineering Corp., Pittsburgh 36, Pa. 502

Powdered Teflon A non-staining, dry-lubricating pow

der, Fluoro-Glide 200, is available for use in laboratories as an aid in instrumental mechanisms. The material is white with a 10-micron average particle size, and offers the expected resistance to solvents and acids of Teflon products. The powder is supplied in a convenient squeeze bottle. Chemplast, Inc., 3 Central Avs., East Newark, N. J. 503

Sulfhydryl Kit A sulfhydryl kit is available which

provides a battery of reagents useful for detecting sulfhydryl groups of varying reactivities in proteins. The kit contains one gram each of the following: p-chloromercuribenzoate, iodo-acetic acid, iodoacetamide, iV-ethyl maleimide, acrylonitrile, dinitrofluoro-benzene, o-iodosobenzoic acid, S-car-boxymethyl cysteine, S-carboxyethyl cysteine; 500 mg. of cysteinyl-succinic acid; 50 ml. of β-mercapto ethanol; 250 mg. of S-DNP-cysteine; and 10 g. of ethyl amine. Gallard-Schlesinger Chemical Mfg. Corp., 1001 Franklin Ave., Garden City, L. Ι., Ν. Υ. 504

C a r b o n - 1 4 and Tr i t ium Compounds

Across the board reductions in prices of all carbon-14 and tritium labeled compounds have been announced. A new catalog, Schedule K, lists over 300 carbon-14 labeled compounds and more than 100 tritium labeled compounds

with the new prices. New England Nuclear Corp., Boston 18, Mass. 505

Radioact iv i ty Standards

Four new radioactivity standards— calcium-45, chlorine-36, iodine-125, and cerium-139—are available from the National Bureau of Standards. Five radium rock standards, krypton-85, and contemporary carbon for radiocarbon dating have been re-issued as standards.

Calcium-45 (Sample No. 4942, $38) is issued as a solution of calcium chloride in hydrochloric acid and has a nominal activity of 8 X 104 d.p.s./ml.

Iodine-125 (Sample No. 4944, $24) is issued as a 5-ml. solution with a nominal activity of 3 Χ 104 d.p.s./ml.

Chlorine-36 (Sample No. 4943, $26) is supplied as a solution of sodium chloride in water, and has a half life of 3 Χ 105 years.

Cerium-139 (Sample No. 4999, $32) is issued as a solid point source.

Krypton-85 (Sample No. 4935, $23) is supplied as 10 ml. of gas.

Contemporary carbon is issued as 1 lb. of oxalic acid at a price of $4.

Orders for radioactivity standards should be sent to Miss E. Zandonini, Radioactivity Standard Samples, Radioactivity Section, National Bureau of Standards, Washington 25, D. C.

H y d r o c a r b o n Standards

The American Petroleum Institute has announced the availability of two new hydrocarbon standard samples. They are: l-trans-2, cis-3, transA-tetramethyl-cyclopentane and 1-meth-yl-3-ethyl-5-iert-butylbenzene. These samples are supplied as 5-ml. ampoules at $65 each. A full list of all available standard hydrocarbons may be obtained by writing Beveridge J. Mair, Carnegie Institute of Technology, Petroleum Research Laboratory, Pittsburgh 13, Pa.

for 75 years the only permanently satisfactory material

for chemical laboratory table tops, shelving, sinks, splash backs, drain boards and fume hoods. Prompt delivery. ALBERENE STONE-A DIVISION OF THE GEORGIA M A R B L E COMPANY. For FREE l i terature and technica l assistance address: THE ALBERMAR COMPANY, 386 PARK AVE. SOUTH, NEW YORK 16, N. Y., DEPT. C.

Circle No. 17 on Readers' Service Card

VOL. 35 , N O . 7 , JUNE 1963 · 1 4 3 A

NEW CHEMICALS C H E M I C A L S R E A G E N T S M A T E R I A L S

No surface glaze or coating

Alberene Stone has a surface that goes all the way thru

ALBERENE STONE

Power Supplies. A single sheet describes regulated current/voltage power sources for magnets and general purposes. The systems include solid state components. Alpha Scientific Laboratories, Inc., F. 0. Box 333, Berkeley 1, Calif. 601

Neutron Generators. Single data sheets describe the Models A-700, A-701, A-702, and A-800 Neutron Generators. The sheets include photographs, performance data, specifications, and suggested applications. Kaman Nuclear, Colorado Springs, Colo. 602

Voltmeters and Test Equipment. An 8-page short-form catalog lists the company's complete line of digital voltmeters, digital ratiometers, ohmmeters, standard systems, input and output accessories, and environmental test equipment. Non-Linear Systems, Inc., Del Mar, Calif. 603

Diffraction Gratings. A 6-page catalog lists sizes and prices of gratings available, including: intcrferometri-cally ruled gratings, concave and plane gratings, and gratings for infrared, metrology, and education. Jarrell-Ash, 26 Farwell St., Newtonville, Mass. 604

X-Ray Diffraction Camera. A 4-page brochure describes the improved Buerger Precession Camera. This camera is a single crystal x-ray diffraction instrument for film recording the projection of a single plane of the reciprocal lattice. Jarrell-Ash Co., 26 Farwell St., Newtonville 60, Mass. 605

Electronic Instrumentation. A 12-page bulletin covers a new line of solid-state electronic instruments for process control. Included are descriptions of controllers, recorders, transmitters, accessories, and computing elements. Bulletin GEA-7749. General Electric Co., Schenectady 5, Ν. Υ. 606

Sulfur Compound Measurement. A 12-page bulletin describes the Type 26-103B Portable Titrilog. This chemical-electronic instrument automatically and continually analyzes the concentration of oxidizable sulfur compounds in gas streams or atmospheres. Bulletin 26103. CEC, 360 Sierra Madre Villa, Pasadena, Calif. 607 Control led Temperature Equipment. A 32-page catalog describes and illustrates environmental portable rooms, vacuum ovens, carbon dioxide incubators, laboratory water baths, ovens, and electric furnaces. Hydor Therme Corp., 7301 Melrose St., Philadelphia 35, Pa. 608 Cork and Stopper Borer. A 4-page bulletin explains a portable, 22-pound Power Borer for boring holes in rubber or cork stoppers. Bulletin PB-1. Ε. Η. Sargent & Co., 4647 W. Foster Ave, Chicago 30, 111. 609 Nuclear Electronic Products. A 12-page catalog lists equipment for the detection, measurement, and analysis of nuclear radiation. Included are counter chambers, pulse measuring equipment, current measuring equipment, power supplies, and radiation monitors. General Electric, Nuclear Electronic Products Section, San Jose, Calif. 610 Radiochromatogram Scanners. A 2-page bulletin describes the Strip-Scanner I, a window-type, 2-pi scanner using a gas-flow detector. The scanner can be used on paper strips, thick gels, and in thin layer chromatography. Atomic Accessories, Inc., 811 W. Merrick R d , Valley Stream, N. Y. 611 Moisture in Liquified Petroleum Gases. A folder describes a water-in-propane test valve. Also included is a copy of the ASTM "Proposed Method of Test for Moisture in Liquified Petroleum Gases (Valve Freeze Method)." Chemical Equipment Corp, 4101 S. New Haven Ave, Tulsa, Okla.

612

Electronic Integrator. A 4-page bulletin describes the Lectrocount II, a chopper stabilized feedback device with a very high input impedance. The instrument can be used for chromatography, densitometry, and as an analog to digital converter. Bulletin 231. Royson Engineering Co, Hatboro, Pa.

613

HYDRAULIC PRESSES I D E A L F O R . . .

Forming KBr Pellets

Forming Pellets for X-Ray and

other Spectroscopic Analysis*

Universal Applications for Research Control Testing

Ceramic and Powder Metal Pressing

S H O W N I N INSERT

• 20 Ton capacity hydraulic press • Guided moving 9 " x 9 " platens • Rugged 3 column construction

22 maximum vertical opening adjustable

• Avai lable with a compact power unil

Accessories for temperature, pressure, extrusion, testing units, etc. are available for all models,

W R I T E FOR B U L L E T I N — D E P T . A * For better results use Loom is 1 VA" precision x-ray pel let d ie

L O O M I S E N G I N E E R I N G & M F G . C O . CApitol 6-8660

Circle No. 89 on Readers' Semice Card

CALDWELL, NEW JERSEY

1 4 4 A · ANALYTICAL CHEMISTRY

MANUFACTURERS' LITERATURE

mm


Gas Purity Problems. A 6-page folder describes the products and services of the company. These are all concerned with gas purity. Included are descriptions of gas purifiers, flow meters, gases containing known amounts of impurities for standards, a chromatograph, and a 48-hour gas sample analysis service. John P. Mickel Assoc, Inc., 5924 Second Blvd., Detroit 2, Mich. 614

Electron Multiplier. A 4-page bulletin illustrates and describes the Electron Multiplier EM-1. Included is information on power supplies. Bulletin 10. Nuclide Corporation, 642 East College Ave., State College, Pa. 615 ATR in Infrared Spectroscopy. A 4-page data sheet describes the multiple reflection accessories for the company's standard and micro attenuated total reflectance attachments. The accessories amplify the intensity of ATR spectra by as much as a factor of four. Data Sheet 21A. Connecticut Instrument Co., Wilton, Conn. 616

Pipeting. A single sheet describes the "Quantapettor." This device can be used for micro- or macropipeting. Sheet SB 264. Standard Scientific Supply Corp., 808 Broadway, New York 3, Ν. Υ. 617

X-Ray Densitometer. A 4-page brochure describes a new instrument for the measurement of local density of a gas. Included are schematics and a tvpical performance curve. Itek Corp., 1450 Page Mill Rd., Palo Alto, Calif.

618

Instrumentation Recorder. A 6-page folder describes the SP-300 Portable Instrumentation Recorder. This is a magnetic tape recorder designed to be used for analytical data. Any measurable phenomena that can be converted into an electrical data signal can be recorded on magnetic tape. Ampex Corp., 934 Charter St., Redwood Citv, Calif. 619 Laboratory Furniture. A 4-part, illustrated catalog of laboratory furniture includes sections on industrial, hospital, and research institutions; hoods; educational equipment; and services and accessories for all types of laboratory equipment. Catalog D7. Duralab Equipment Corp., 303 Stanley Ave., Brooklyn 7, Ν. Υ. 620 Thermocouples. A 32-page booklet pictures and describes thermopiles and thermocouples for all makes of spectrometers. Catalog-1963. Charles M. Reeder & Co., Inc., 173 Victor Ave., Detroit 3, Mich. 621 Glassware. A 72-page catalog supplement (SC-180) lists, 246 new addi-


The busy Cary Model 14

SPECTROPHOTOMETER OF MANY TALENTS

For details on the Model 14, send for Data File A302-63

Model 14 has proved of value in almost all areas of spectro

photometry because of built-in versatility and a variety of acces

sories and modifications. Standard instrument can be used for

fixed-wavelength kinetic studies, for recording absorbance or

transmittance spectra, linear in wavelength. Spacious sample

compartment accommodates cryostats, furnaces, etc. Unique

beam geometry allows use of very small cells without masking.

Accessories available for flame, fluorescence, reflectance and

other studies. Standard modifications for near-IR studies of

heat- or photosensitive samples, or for scanning samples up to

1000°C with no loss of photometric accuracy.

APPLIED P H Y S I C S C O R P O R A T I O N 2 7 2 4 SOUTH PECK ROAD • MONROVIA, CALIFORNIA

I N S T R U M E N T S

Raman /UV/1R Recording Spectrophotometers · Vibrating

Cary

N£W

CATALOC

VITREOSIL PURE FUSED

QUARTZ LABORATORY WARE INDUSTRIAL WARE TUBING AND ROD SPECIAL APPARATUS IF YOU DON'T HAVE THIS NEW 30 PAGER, WHICH INCLUDES THE UNUSUAL PHYSICAL PROPERTIES OF VITREOSIL, WRITE TODAY, IT 'S FREE.

THERMAL AMERICAN FUSED QUARTZ CO.

RT 202 & CHANGE BRIDGE RD. MONTVULE, NEW JERSEY



tions to the list of lime glass and hard glass laboratory apparatus. Owens-Illinois, Toledo 1, Ohio. 622

Gas Chromatograph. A single sheet describes an inexpensive gas chromatograph "kit". The instrument can be built in 8 hours. Gow-Mac Instrument Co., 100 Kings Rd., Madison, N. J.

623

Process Chromatography. An 8-page bulletin describes in detail the operation of process gas chromatography. Included are diagrams explaining the basic process and various components. Bulletin 37-101d. The Fox-boro Co., Foxboro, Mass. 624

Balances and Weights. Catalog G contains illustrations and complete specifications of balances with capacity ranges from 10 grams to 20 kilograms and sensitivity ranges from 10 milligrams to 1 gram. Ohaus Scale Corp., 1050 Commerce Ave., Union, N. J.

625

Temperature Controllers. A 4-page bulletin describes the various models of a resistance thermometer-electronic bridge circuit which controls temperatures to within 0.001° C. Bulletin 84. Bavlev Instrument Co., Box 538, Danville, Calif. 626

Recorders. A 2-page data sheet illustrates and describes the TR 800/600 Direct Writing Recording Systems. These 8-channel and 6-channel systems are compact analog recorders. Data Sheet TR 800/600. Techni-Rite Electronics, Inc., 65 Centerville Rd., Warwick, R. I. 627

Recording Microphotometer. An 8-page brochure contains photographs, drawings, and data concerning the Model 23-500 Recording Microphotometer. This instrument has an optional digital read-out system and a photoelectric setting device. Jarrell-Ash, 26 Farwell St., Newtonville 60, Mass.

628

Micro-Flow Pumps. Literature describes a line-operated micro-flow pump which operates by electrolysis. Pumps come in capacities of 10, 25, and 50 ml. with controls for 8 flow rate settings from 1 ml./Vé hr. to 1 ml./24 hr. Sage Instruments, Inc., 2 Spring St., White Plains, Ν. Υ. 629 Fume Hoods and Lab Carts. A 32-page brochure describes benches, carts, instrument desks, portable tables, and the new fiberglass fume hoods for laboratories. Labconco, 8811 South Prospect, Kansas City, Mo. 630 Chloride Ion Analyzer. A 4-page bulletin gives description, operation, and specifications of the Model J Chlo-

Precision Temperature Control! J U M O CONTACT THERMOMETERS with ROTARY SETTING MAGNET • Instant temperature ad

justment • All operating parts sealed

in * No loose connect ions-

no erratic contacts * Temperature maintained to

0.01 °C

This regulating and control thermometer, in a single unit, gives excellent service for lengthy periods at up to 3 0 0 0 switching actions per hour. The upper portion comprises the temperature selector, the lower part the mercury reservoir and control thermometer with stem. A molded bakélite cap encloses the terminals and carries the rotary setting magnet, rotation of which moves the setting bar to the desired temperature setting. Regulation is effected by a contact wire attached to the setting bar and extending through a sliding contact into the control thermometer where it makes contact with the mercury as the latter rises in the capillary.

Catalog No. A-98770 150mm stem length Catalog No. A-98772 300mm stem length

1 1 100

RANGE PRICE 0 - 50°C $28.00 0-100°C $28.00 0-150°C $30.00 0-200°C $31.00 0-250°C $33.00 0-300°C $35.00

Please specify stem length and range when ordering

For use with Junto Thermometers, we recommend our #98885 Electronic Relay $75.00

S T A N D A R D S C I E N T I F I C

/

Supply Corp. l O t t R O A D W A Y N E W V O t K 3 , N . V .

IABORATORY APPARATUS · REAGENTS AND CHEMICALS

* 75th Anniversary Year • Circle No. 115 on Readers' Service Card

VOL. 35 NO. 7, JUNE 1963 · 149 A

PURE MATERIALS

τ* s

Jarrell-Ash . . . as exclusive U.S. distributor for Johnson, Matthey & Co., Ltd. . . . offers you the most complete line of high-pur i ty mater ia ls for use in quant i ta t ive spectrochemical analysis and research:

METALLIC SALTS METALS — powder, foil, sponge, lump, wire, etc. RARE EARTH OXIDES ELECTRODES SOLUTIONS STANDARD SETS OF ALLOYS

Each sh ipmen t of each mate r ia l is accompanied by a laboratory report which l ists detected impur i t i es in par ts per m i l l i on .

SPECTROGRAPHS SUPPLIES Jarrel l -Ash also carr ies in stock for your convenience: • Jarrel l -Ash S Q Powder Standards. • Kodak S p e c t r o g r a p h s F i lm, Plates.

Developers, Stop Bath, Fixers and Hardener.

• " N a t i o n a l " Electrodes, Pre-Forms, Powders.

24 HOUR SERVICE ON STOCK ITEMS

Dedicated to excel lence in research, deve lopment and manufac tu re of precis ion analy t ica l i ns t rumen ta t i on .

For cata logs . . . c l ip the coupon, a t tach to your company le t terhead and mai l .

JARRELL-ASH COMPANY I 26 Farwell Street |

Newtonville 60, Mass. N A M E .

P M


ride Ion Analyzer. This instrument monitors the chloride ion concentrations in process streams in the ranges 1 to 1000, or 10 to 10,000 p.p.m. Beck-man Scientific and Process Instruments Division, 2500 Harbor Blvd., Fullerton, Calif. 631

Biological Glassware. An 8-page booklet describes five specialized glassware units: metabolism cages for tracer studies with small animals, Wis-treich Fat Extractor, a Chemostat, a compact Micro-Kjeldahl system, and the Auto-Qot for pipeting highly volatile materials. Delmar Scientific Laboratories, 317 Madison St., Maywood, 111. 632

Counter-Timers. A single sheet pictures and gives specifications for the 710 Series of solid-state 11 MC/100ns Universal Counter-Timers. Eldorado Electronics, 1832 Second St., Berkeley 10, Calif. 633

Warburg Auto-Manometer. A 4-page brochure, illustrated with photographs and diagrams, explains the instrument's capabilities for measuring any variable that is a function of pressure. Typical Warburg and non-Warburg applications are listed. Mechrolab, Inc., 1060 Linda Vista Ave., Mountain View, Calif. 634

Chromatograph. A 4-page bulletin describes the capabilities of the modular 26-204 Laboratory Chromatograph. This instrument automatically programs temperature with reference column accuracy from ambient to 450° C. Consolidated Electrodynamics Corp., 360 Sierra Madre Villa, Pasadena, Calif. 635

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.

Chemist-Analyst. Vol. 52, No. 2. The April issue includes among the articles giving various analytical procedures one on a method for inorganic micro qualitative analysis based on circular paper chromatography. The "Lab Suggestions" section gives some tips useful in thin layer and gas chromatography and other laboratory procedures. J. T. Baker Chemical Co., Phil-lipsburg, N. J.

Gas Chrom Newsletter. The Apr i l issue contains papers on the relation-

[=3aQ^=iZί\[RÎcû,

POLYETHYLENE F A B R I C A T E D

U N B R E A K A B L E

for al l purposes What size or type of tray do you need?

Bel-Art heavy walled polyethylene trays have a multitude of uses and are a valuable asset anywhere.

Do you need a round, square, rectangular, deep or shallow shape? Do you need flanges, outlets, spigots, threaded fittings, compartments or lids? Whatever your requirements we'll fabricate these trays to your specifications. No minimum quantities; we'll assemble a single tray to fit your purpose. Our facilities also extend to custom-made tanks, barrels, vessels, etc.


1 5 0 A · ANALYTICAL CHEMISTRY

Bel-Art trays of welded construction are rigid, tough, unbreakable and impervious to strong acids, alkalies and some solvents. In addition to regular or linear polyethylene, we also fabricate polypropylene or rigid PVC.

Sizes listed in our new catalog are representative but do not indicate size limitations. Your laboratory supply house or Bel-Art Products will be happy to quote on your special requirements.

Listed in our NEW 1963 56 page catalog. Write Dept. A.

for your FREE copy

BEL-ART PRODUCTS, P E Q U A N N O C K , N . J . O X b o w 4 - 0 5 0 0

T h e M O S T C O M P L E T E l i n e o f P l a s t i c L a b o r a t o r y W a r e a v a i l a b l e f r o m O N E s o u r c e


Jarrell -Ash


ship of the GLC part concentration and on ymer phases. Also tails of the ASTM p: ating quantitative an ard fatty acid ester Science Laboratories lege, Pa.

ition coefficient to organosilicon pol-included are de-

rogram for évaluasses of a stand-sample. Applied Inc., State Col-

CEC Recordings. First Quarter 1963. This 24-page issue discusses thin films, the Titrilog (measures oxidizable sulfur), seals for severe environments, oscillography, and data processing. Consolidated Electrodynamics, 360 Sierra Madre Villa, Pasadena, Calif.

ARL News Letter. Vol. XVI, No. 1. This 4-page issue contains a detailed discussion of detectors used in x-ray fluorescence analysis. Included are figures showing comparisons in efficiency and stability of various detectors. Applied Research Laboratories, Inc., P. 0. Box 1710, Glendale 5, Calif.

Commentary. No. 1. This is the first issue of a new periodical. The 4-page issue discusses the company's GC-IR Analyzer and describes an infrared ATR consulting service. Wilks Scientific Corp., Box 32, Noroton Heights, Conn.

The Spex S p e a k e r . This issue contains a tion with diagrams plasma jet fluid analy of this spectrochem: alloys, blood, sea wat and petroleum prodv. Spex Industries, Inc Metuchen, N. J.

Vol. VIII, No. 1. detailed descrip-

of the stabilized zer. Applications ical technique to er, plating baths,

:.cts are discussed. 3880 Park Ave.,

RSCo Review. Vol. 5, No. 2. The Model 1205 Automatic Fraction Collector which can collect up to 500 samples in a single run is described in this issue. The uni; can operate by volumetric siphoning, timed flow, or drop counting. Research Specialties Co., 200 South Garrard Blvd., Richmond, Calif.

RSCo Review. Vol 5, No. 4. This 4-page issue describes an automatic reagent dispenser designed to operate with automatic fraction collectors. One or two reagents can be added to each fraction during the fraction collecting operation. Research Specialties Co., 200 South Garrard Blvd., Richmond, Calif.

A e r o g r a p h Prev iews a n d Rev iews . The March issue is devoted to the Pestilyzer, Model 680, a gas chromato-graph with electron capture detector for pesticide residue analysis. Wilkens Instrument & Research, Inc., P. O. Box 313, Walnut Creek, Calif.

REXYN ION EXCHANGE RESINS IN THREE PURITY GRADES There are 40 Fisher Rexyn* ion exchange resins, including organic

and inorganic resins in strong and weak acid and base, and mixed

acid-base forms. Take your choice of these three purity grades:

/ . Research Grade Rexyn provides extremely high purity and regen

eration efficiency required in ultrasensitive analytical technique

and research. Maximum metallic impurit ies: Fe, 0.005%; Cu,

0.0025%; Pb, 0.0025%; Ni, 0.0025%. 2. Chromatographic Grade

Rexyn, designed for ion exchange chromatography, is available in

two particle sizes (100-200 and 200-400 mesh); gives excellent

resolution and sharp, clear separations. Maximum metallic im

purities: Fe, 0.05%; Cu, 0.005%; Pb, 0.001%; Ni, 0.002%. 3.

Analytical Grade Rexyn is economical, ideal for routine analytical

use and pilot plant operations. Lot analysis of key chemical and

physical properties on each label. For reference chart listing all

Rexyn ion exchange resins, write Fisher Scientific Company, 100

Fisher Building, Pittsburgh 19, Pa. J-190

*Fisher Scientific Company Trademark

FISHER SCIENTIFIC World's Largest Manufacturer-Distributor of Laboratory Appliances & Reagent Chemicals

Boston · Chicago · Fort Wor th · Houston • New York · Odessa, Tex. · Phi ladelphia P i t tsburgh · St. Louis · Un ion , N. J . · Wash ington · Edmonton · Mont rea l · Toron to


VOL. 35, NO. 7, JUNE 1963 · 1 5 1 A

CHEMICALS REAGENTS MATERIALS

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