NEW
PRODUCTS
Equipment Apparatus Instruments
The 8th International Congress and General Assembly of the International Union of Crystallography was held August 13 to 27 at Stony Brook, New York, N.Y. A few of the new instruments shown at this meeting are briefly discussed below Automatic Single Crystal Diffractometer
Siemens America introduced a high precision a u t o m a t i c single crys tal diffractometer (Type A E D ) , designed for closed loop operational use with computers or manually, of t h e open X-circle design. All reflections of t h e reciprocal space hemispheres can be measured in t h e symmetrical position. A short focus-to-crystal distance, with a special collimator a r r a n g e m e n t , results in a high intensity of t h e measured reflections. The four-circle diffractometer h a s t h e axes of all circles factory set and t h e y are guaranteed to intersect within a sphere of 25 microns diameter. A magnetic clutch decoupling of t h e t h e t a / 2 t h e t a is provided for asym metrical operation. Other features are special photodigitizers for checking angular settings, a u t o m a t i c X - r a y s h u t t e r which closes during angular positioning of crystal, and others. F o r more detailed information, c o n t a c t Measuring I n s t r u m e n t s Division, Siemens America, Inc., 350 Fifth Ave., N e w York, N.Y. 10001 401 PW 1 1 0 0 a u t o m a t i c single-crystal diffractometer, is a computercontrolled, four-circle i n s t r u m e n t t h a t features a two-point chicircle suspension t h a t doubles t h e mechanical stability t o allow the use of crystal monochromatized radiation. The company also offers the Model PW 1170 automatic sample changer which pro vides for the X-ray diffraction analysis of up to 3 5 samples over a preset angular range. Other systems available for crystallog raphy include the N o r e l c o / A M R Model 8-600 microfocus X-ray system and the Modular l-C data handling system t o permit a broad range of options f o r system expansion o r modification. Philips Electronic Instruments, 7 5 0 S. Fulton Ave., Mount Vernon, Ν.Υ. 1 0 5 5 0 402
XRD-700D direct-reading X-ray diffractometer is completely m o d ular in construction and available in several cantilever styles. The i n s t r u m e n t features a solid-state t r a n s f o r m e r ; a solid-state KVP, Ma control and stabilizer; wide-range diffractometer; detector modules, and a heat exchanger. The unit is designed f o r future expansion and can be easily a u t o m a t e d . General Electric Co., Analytical Measurement Business Section, Schenectady, Ν. Υ. 12305 403
VOL. 41, NO. 12, OCTOBER 1969
•
123 A
New Products
ACCURATE
MOISTURE
ANALYSIS fibers • grains • semi-liquids
•
solids
mmK&B uses 1 "
m:iM:mmc brass sample .1SH$
Automatic microbalance for research in thermogravimetry, mass sorption, magnetic susceptibility, and areas which require monitoring of weight changes in the micro gram region offers digital readout and recorder output. Core of the system is an allfused quartz balance element which is of two-pan equal arm design. Shown on the right are the servo controller and readout instrument. Maximum sample weight is 10 g; minimum, 0.1 g. Resolution is 0.1 /tg; precision, 0.7 jug. There is an optional potentiometric recorder available. Worden Quartz Products, Inc., 6121 Hillcroft, Houston, Tex. 77036 404
Control costs and maintain consistent quality through ac curate moisture analysis. Dietert-Detroit Moisture Tellers are widely used in industry for research and analysis of foodstuffs, chemicals, fibers, foundry sands, soaps, tobacco, ceramics and similar materials. Complete range of models available. MODEL 278A-12 is equipped with two 8" dia. χ 12" deep sample pans, to accom m o d a t e bu Iky samples such as wool.
HARRY W. DIETERT CONTROL
CO.
9330 Roselawn Avenue · Detroit, Michigan 48204 Telephone: 933-9790 (Area Code 313) Please send Moisture Teller Catalog and prices. Name
,
Address_ City
_State_
Circle No. 21 on Readers' Service Card
124 A • ANALYTICAL CHEMISTRY
Rapid Glucose Analyzer
A liquid ion exchange electrode that has a 93-to-l selectivity for potassium ions over sodium ions in 0.1 molal aque ous solutions is expected to be excep tionally useful in flow-through systems for the measurement of physiological fluids. The new electrode's response to potassram ions is Nernstian between 5 X 10-* and 0.5 molal; effect of changes in pH between 3 and 9 is negli gible on the potassium response above 10~3 molal. Corning Scientific Instru ments, Corning Glass Works, Medfield, Mass. 02052 405
Three minutes from patient to an swer are all that are required for glu cose determinations with the ERA-2001 glucose analyzer. The instrument uses as little as 10 μΐ. of serum or plasma and 50 μ\. of urine and consistently maintains ± 2 % precision; the reading is linear for concentrations as high as 400 mg%. Core of the system is a polarographic oxygen sensor that measures rate of change in oxygen con centration as the sample (which needs no involved preparation) as is injected into an enzyme reagent solution. Beckman Instruments, Inc., 2500 Harbor Blvd., Fullerton, Calif. 92634 407
Cryogenic DC Instrument
EQUIPMENT
Company_
Sensitive Potassium Electrode
Model 800 picovoltmeter includes a cryogenic input head and a room-tem perature electronics package. The input head and assembly are designed for operation in liquid helium and con ventional dewar systems. Full-scale is from 30 pV to 3 μΥ in eleven IX and 3X ranges. Noise is less than 3 pV peak-to-peak. Potentiometric accuracy is ±2%. An internal current source permits the measurement of re sistances from 3 Χ 10" 11 to 3 X 10* Ω with a maximum current of only 100 mA. Keithley Instruments, Inc., 28775 Aurora Rd., Cleveland, Ohio 44139 406
Fraction Collectors
Fraction collectors of 160 and 400 test tube capacity form fractions by measuring the weight of the material being collected using a balance with an accuracy better than 90 mg/fraction. Test tube holders advance from tube to tube using a mechanism which is simi lar to a ratchet based on only five mov ing parts. The 160-test-tube model re quires only 1.1 sq ft of lab bench area. Drop count and timed flow are optional accessories. Soltec Corp., P.O. Box 312, Encino, Calif. 91316 408
New Products
NUMEC is the exclusive distributing and servicing organization in the U. S. for the Carlo Erba line • Elemental Analyzer—for the automatic analysis of CHN or O. • Porosimeter—for the automatic deter mination of pore radius from 37.5 to 75,000 . • Sorptomatic—an automatic BET instru ment for surface area measurement and pore size distribution.
NUMEC® Instruments Department 609 North Warren Avenue Apollo, PA 15613 Phone: 412-567-6736 Circle No. 164 on Readers' Service Card
The beginning of a SEISCOR sampling valve...
. . . the end of your chro matographic sampling problems. Through precision design and construction, Seiscor diaphragm -type sampling valves a s s u r e fast re sponse, long life, repeat ability and the plus of flexible specifications to meet your temperature and p r e s s u r e require ments. Contact Seiscor Division of Seismograph Service Corporation, P. O. Box 1590, Tulsa, Oklahoma 74102.
Glassware apparatus for determining the concentration of various gases con sists of three chambers for holding the absorbing gases; one chamber intro duces and holds gas, the second and third absorb oxygen and carbon dioxide, respectively. This system was de veloped by Scholander; carefully mea sured volumes give direct answers. The assembly uses only 0.5 ml of sample gas; accuracy is then 0 . 0 2 % ; analysis time ranges from 5 to 8 min. The Micro-Scholander includes a constant temperature water bath, motor-driven stirrer, and a spirit level. Instrumenta tion Associates, Inc., 17 W. 60th St., New York, Ν. Υ. 10023 409
Tissue Culture Hood An improved tissue culture hood has an ultraviolet-proof sash to prevent un desirable effects of exposure of materi als to UV. The new design uses bi-fold doors which allow four positions, in cluding those fully closed for TJV steril ization, and fully open for decontami nation. Labconco Corp., 8811 Pros pect St., Kansas City, Mo. 64132 4 1 0
In Quality Industrial Instruments,
We are
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Finders
Seismograph Service Corporation A
SUBSIDIARY
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RAYTHEON
Visit us in Booth 940 at the Houston ISA Show Circle No. 67 on Readers' Service Card
126 A • ANALYTICAL CHEMISTRY
COMPANY
Beryllium Oxide Laboratoryware Ultrapure beryllium oxide laborato ryware for use up to 2000 °C includes ceramic crucibles, trays, tubes, thermo couple insulators, and custom-formed units made of up to 99.99% BeO. Ex tremely corrosive acids, bases, and salts can be reacted in Berlox crucibles for high-purity chemical processing. Na tional Beryllia Corp., Greenwood Ave., Haskell, N. J. 07420 411
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32nd EXPOSITION OF CHEMICAL INDUSTRIES MANAGEMENT: INTERNATIONAL EXPOSITION CO., 200 PARK AVE., NEW YORK, N.Y. 10017 Circle No. 37 on Readers' Service Card
128 A • ANALYTICAL CHEMISTRY
I'm Thomas pH 4.01 Buffer
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Quantector indicates the concentration of a flowing gas mixture and, when used with a strip chart recorder, can provide integrated signals so that total quantity of contaminants removed from any surface (outgassing or solvent stripping) can be determined. Samples may either be purged with an inert gas or decontaminated under vacuum and then analyzed for residual contami nants. The Quantachrome Corp., 337 Glen Cove Rd., Greenvale, Ν. Υ. 11548
412
Dielectric Defect Detector
An instrument consisting of a micro scope, light source, electrophoretic test cell mounted on an X-Y stage can be used to test the integrity of organic and inorganic insulating coatings on con ductive substrates. The instrument can locate invisible pinholes as small as 0.1 μ in diameter or the absence of a few molecules of coating material. Navan, 1320 East Imperial Highway, El Segundo, Calif. 90245 413
Color me RED!
I'm Thomes
pH 7.00 Buffer Color me YELL01/V!
I'm Thomas pH 10.00 Buffer
Converter Makes pH Meter a Thermometer
The Model 632 temperature convert er makes it possible to use a pH meter as a direct-reading centigrade or Fahr enheit thermometer. The converter ac cepts three thermistor probes plus a sensing/reference electrode pair. Set ting a single switch on the converter de termines whether readings are taken from probes or electrode. Used with the digital pH/mV meter Model 801, it provides illuminated inch-high digital readout precise to 0.1 °C. Converter accuracy is better than ±0.25 °C. Orion Research, Inc., 11 Blackstone St., Cambridge, Mass. 02139 414
Color me BLUE! Get the Thomas Color-Coded 3-Pack! One pint each of color-coded buffers pH 4.01, 7.00 and 10.00-$8.80 per set.
ARTHUR H. THOMAS CO.
Scientific Apparatus VINE STREET AT 3 R D PHILADELPHIA, PA. 19105 Circle No. 89 on Readers' Service Card
Separate amines easily, efficiently with
New Products
New Chromosorb* 103 •.H.UJ.UI.IJ.U.II.I.BWfflH ΙΙ.ΜΙΙΙΙΙΜ-ΙΙ^^ΕΗΜΙ High vacuum reflection chamber for in frared studies is capable of being evac uated to pressures of less than 1 0 " mm Hg. Provisions are included for heating the sample to 450 °C to drive off absorbed gases, and high vacuum fittings are provided! for admitting sam ple gases into the chamber. From three to as many as 50 or 100 reflec tions may be obtained. This accessory will f i t into any standard IR spectro photometer and may be used for either multiple internal or multiple specular re flection measurements. Wilks Scienti fic Corp., 140 Water St., South Norwalk, Conn. 06856 415
4-ft x 4-mm I.D. glass coil, 100/120 mesh Chromosorb 103, 35 ml/min, FID. Sample size: 0.1 /il. Column program: 200-250· C, 15°/min. 1. Methylamine 2. Ethylamine 3. iso-propylamine 4. 5. 6. 7.
ni-propylamine sec-butylamine jT-butylamine iso-pentylamine
8 . ri-pentylamine 9. n-hexylamine
Chromatographic Refrigerator
The Model CR-3 chromatographic refrigerator is 26V':> in. wide, but roomy enough to hold several labora tory instruments. I t is especially adapted for the company's linear frac tion collectors, but can accommodate others. Wire racks can be positioned anywhere at 1-in. intervals. Tem peratures from 35° 13 105° F can be maintained; temperature stability throughout 0.57r of t r e chamber is ± 2 °F. Instrumentation Specialties Co., Inc., 4700 Superior. Lincoln, Neb. 08504 416 Water Analyzers
The Series CB2 are water quality analyzers which can he used for silica, fluoride, iron, chromate, chlorine, cop per, sulfite, EDTA, permanganate, hy drazine, phosphate, arc! others. A new solution puni]) precisely meters reagent into sample. The photo colorimeter is, in some cases, capable of ppb trace de tection. Electronics a:-e solid state with integrated circuits. The instruments can be used for determining the condi tion of municipal water or industrial in take and effluent continuously, auto matically. Hach Chemical Co., Ames, Iowa 50010 417
Chromosorb 103 is a polyaromatic porous resin de veloped by Johns-Manville as a solid-type support for the separation of amines and basic compounds. Until now, amine separation has been both labo rious and difficult. With new highly selective Chromo sorb 103, it's fast and easy. For more specific information, write for our bulletin FF-181. Johns-Manville, Box 290-C, JM Trenton, New Jersey. Johns-Manville • C h r o m o s o r b is a J o h n s - M a n v i l l e registered t r a d e m a r k for its b r a n d of p r o d u c t s d e v e l o p e d for use as s u p p o r t m a t e r i a l o r a d s o r b e n t s for gas c h r o r n o t o g r a p h y . Circle No. 39 on Readers' Service Card
VOL. 4 1 , NO. 12, OCTOBER 1969
•
129 A
New Products
a new edition for the purity-minded
Pollution sampler, which is weather proof, light in weight, and operated by rechargeable batteries, takes a sample each hour and stores it in a separate bottle. The positive displacement tub ing pump draws samples up to 8 ft. Sigmamotor, Inc., 544 North Main St., Middleport, Ν. Υ. 418
Manual Countercurrent Unit
Ultra Carbon Corporation announces a complete, new, enlarged Analytical Laboratory Catalog. A 4 8 - p a g e , i n f o r m a t i v e c a t a l o g of graphite and carbon products devel oped by the most unique shop in the world, designed to meet the increasing d e m a n d s of s p e c t r o s c o p i s t s f o r a fuller range of precision manufactured graphite materials. Clearly illustrated and detailed for easy selection are 120 of the most frequent ly requested preformed e l e c t r o d e s each machined to micrometer dimen sions and purified by Ultra's famous " F " purification process. Also includ ed are listings and descriptions of Ultra Purity rods, powders, chips and over 40 laboratory products. Complete data is supplied on Ultra's unique custom fabrication services and engineering facilities. Your per sonal copy is waiting. It's free. W r i t e : Ultra Carbon Corporation, P.O. Box 747, Bay City, Mich. 48706
ULTRA CARBON unmwimtimmummmmumjÊmam Circle No. 74 on Readers' Service Card
130 A
•
ANALYTICAL CHEMISTRY
A compact manually operated coun tercurrent unit is a 20-tube instrument which uses the same exclusive center tube drain as the company's larger au tomatic units. Tube capacities are available for 1, 2, 10, and 40 ml per phase. The upper phase is automati cally recycled after 20 transfers. E-C Apparatus Corp., 755 St. Marks St., Philadelphia, Pa. 19104 419
SpectraSpan, Model 2 0 1 , m u l t i e l e m e n t a t o m i c analyzer, measures t w o or m o r e elements simultaneously. The s y s t e m is designed for a p p l i c a t i o n s where rou tine analysis of a fixed n u m b e r of ele m e n t s is desired. A unique h i g h - t e m perature plasma, the SpectraJet, is the excitation source. Both solids and so l u t i o n s can be analyzed. The i n s t r u m e n t incorporates a high dispersion 1 A / m m at 2 0 0 0 A échelle s p e c t r o m e ter and solid state e l e c t r o n i c s . A variety of accessories is available i n c l u d i n g a u t o m a t i c s a m p l e changers and data handling equipment. SpectraMetrics, Inc., N o r t h w e s t Park, B u r l i n g t o n , Mass. 01803 421
Calculator
A new accessory, Model 9120A calculator printer for the Model 9100 computing calculator prints at ISO lines per minute. The accessory is easily mounted on top of any of the company's calculators and requires no additional desk space. Pushbutton controls allow the operator to choose.printout of any of the three calculator registers in Ζ, Υ. X order, exactlv as thev appear on the display.' The Model 9J25A A"-}" plot ter also works with the calculât orprinter combination. Inquiries go to Manager, Hewlett-Packard Co., Ί-501 Page Mill Pd., Palo Alto, Calif. 94304 422
Laboratory Slimline ion-selective electrodes and new solid state—expanded scale pH and m i l l i v o l t m e t e r c o m b i n e to offer an iona c t i v i t y s y s t e m f r o m 1M to well below 1 ppm. The Model 3 8 A pH and mV m e t e r provide readings over a f u l l range of 0 t o ± 1 4 0 0 mV and 0 t o 14 p H . Accuracy is ± 0 . 0 0 5 pH or ± 1 . 0 mV in t h e e x p a n d e d m o d e , w i t h repeatability t o ± 0 . 0 0 1 pH or ± 0 . 1 mV. The line of S l i m l i n e electrodes now includes bro m i d e , c h l o r i d e , f l u o r i d e , copper, and sulfide/silver. Coleman Instruments Division, Perkin-Elmer Corp., 4 2 Madi s o n St., M a y w o o d , III. 6 0 1 5 3 420
Printer
Refrigerators
Model LR/FC-50 laboratory refrig erator has been made to accommodate fraction collectors. Standard features include high quality porcelain enamel finish, urethane foamcd-in-place insula tion, accurate temperature control and stability, forced air convection system, automatic defrosting, automatic con densate evaporatory, and self-closing doors with security locks. The compa ny's Uni-therm laboratory refrigerators come in various sizes and with optional accessories. Puffer-Hubbard Refrigera tor Division, Grand Haven, Mich. 49417 423
when is a "Mettler not a balance?
New Products
alone in a watery^ world they will never meet!
"
fl 2 6 . 8 *C when it's a Mettler thermal instrument for... ...conducting TGA/DTA/DTG on one sample at the same time. The Mettler Thermoanalyzer 2 allows you to d i rectly compare these test data because test conditions are truly identical. It is an invaluable research tool which allows you to work w i t h multigram as well as milligram samples. The capacity/weighing sensitivity ratio of the Thermoanalyzer 2 is the highest available anywhere. ...identifying materials by hot stage microscopy. Investigate all sorts of thermal phenomena w i t h the Mettler FP-2. Simply attach the instrument to your microscope and program the heating system. The hot stage will automatically give you precisely con trolled temperature from below room to 300°C. Temperatures at which sig nificant thermal events occur are dis played on the FP-2's digital readout panel. ...measuring temperature to +0.15°C. The Mettler TM-15 features accuracy and ease of use in just about any lab oratory application where BTU's are added or removed from a liquid, slurry, gas or solid. Readout of the TM-15 is completely digital—includ ing the tenths-of-a-degree value. For full details on these " M e t t l e r s " , write Mettler Instrument Corporation, 20 Nassau St., Princeton, N.J. 08540.
mettler® Circle No. 45 on Readers' Service Card
132 A • ANALYTICAL CHEMISTRY
Adapter systems now permit the use of nondispersive X-ray spectrometers as accessories with most electron microprobes and scanning electron micro scopes. A floor-mounted storage Dewar automatically feeds liquid nitrogen into a 10-lb assembly containing a 400-cc cryostat within a small Dewar. This as sembly mounts directly to a port on the column of the microprobe or scanning electron microscope. Counting rates to 100,000 cps may be processed with the system. Key advantage is that the op erator can determine the composition of his specimen while he is looking at it. Kevex Corp., 898 Mahler Rd., Burlingame, Calif. 94010 424
Model 320 trace impurity analyzer, a gas chromatograph with a helium ion ization detector, has a capability of 10ppb sensitivity. The instrument is use ful in the analysis of fixed gases and light hydrocarbons. Column and detec tor ovens are controlled by independent proportional temperature controllers. Electrometer has a linear dynamic range of 10" and uses a varactor input. The solid-state d.c. power supply has output in excess of 700 V. Special low dead-volume gas sampling valve is included. Compact cabinet is 16" χ 24" X 18". Antek Instruments, Inc., P. O. Box 7903, Houston, Tex. 77036 425
Two lonely impurities could escape the odds of lonXchange mixed-bed efficiency by coming through IWT's Duplex De-ionizer. There is only a 1/25,000,OOOnth chance they will ever meet. But one part impurity to twenty-five million parts water is Chemically Pure. In terms of conductivity or resistance to an electric current, the purity is 15 megohms-cm. Such purity is on TAP with our Duplex De-ionizer—that's the system that uses two cartridges in SERIES to back stop impurities and allow complete ex haustion (the color change tells you) of the resin. Then you just move No. 2 cartridge to No. 1 spot; replace No. 2 with a fresh one to return to full potential. Sorry about those two impurities. Two grades of ^ cartridge resins are offered: Universal and Research. Bui 2 6 8 , describes the cartridge options, fixtures, purity levels and costs. A copy is yours for the asking.
ILLINOIS WATER TREATMENT COMPANY 840 CEDAR ST.. R0CKF0RD, ILLINOIS 61105
iwt
ion Xchange
Circle No. 33 on Readers' Service Card
New Products
We've got more NMR Solvents to choose from ! Take y o u r pick of the best. The choice should be easy; there are n o w 67 deuterated solvents a n d standards for N M R with the EM-Reagents l a b e l . . . t h e largest selection available. Find the ones y o u need o r w o u l d like t o try in our complete catalog of EM analytical chemicals. For y o u r free c o p y , just write: EM-Reagents Division, Brinkmann Instruments, Cantiague Road, Westbury, N.Y. Π 5 9 0 . A DIVISON OF
DK 06 Multi-Dekameter measures the dielectric loss and dielectric constant of any sample, with high accuracy, over the frequency range of 100 kc to 12 Mc, as selected. Dielectric constant deter minations are based on the heterodyne beat system, with tuning indication by a built-in oscilloscope and readings from a 4000-division condenser scale, while the dielectric loss is obtained by the dif ference substitution technique. Deter minations can be made with a variety of sample-holding cells for all media ex cept gases. Moisture determinations, as well as oxidation, and other chemi cal reaction studies can be made. Kahl Scientific Instrument Corp., P. O. Box 1166, El Cajon, Calif. 92022 426
EM-Reagents
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BRINKMANN
Circle No. 98 on Readers' Service Card CELL R E C O N D I T I O N I N G SERVICE Id U
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υ Scientist 909 allows the operator to write his equation directly on its key board and read out the answer as soon as he presses the "equals" key, bypass ing "machine language." Dynamic range of the instrument is 200 decades with 10 significant-figure accuracy. An swers are displayed on a readout to 10 figures plus illuminated scientific nota tion and decimal point. All functions of the machine are executed by a single key stroke. The basic instrument pro vides 26 storage registers, with up to 122 available optionally. Up to 25,600 consecutive steps can be performed au tomatically in addition to loops, branch es, and subroutines. Modular design allows expansion into a computer with peripheral equipment such as the 941 printer and plotters etc. Cintra, 440 Logue Ave., Mountain View, Calif. 94040 427
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