New Products MK-3, new addition to the HAEMACOUNT line of medical instrumentation, in conjunction with the company's MKDB computer printer will provide four hematological tests in minutes; they are red and white cell counts, and hemoglobin and hematocrit. MK-3 costs $3800; MK-DB, $4500. General Science Corp. 203-377-3784 437
Operational computer is a modular sci entific computational tool that is patch board-programmed with standard ana log computer techniques yet performs calculations digitally; it is ideal for use in solving differential equations. Denelcor, Inc. 303-892-0987 438
MiniAC is a 10-V analog/hybrid com puter specifically designed for educa tional use; outstanding features include modular expansion up to 27 amplifiers, standard digital voltmeter, optional logic expansion, and others. $5000 to $10,000. Electronic Assoc, Inc. 201229-1100 439
Uniflow fiberglass fume hoods now come in 5-ft high models; units are also available in 4- and 6-ft sizes with ser vice fixtures, work surfaces, base cabi nets, and venting accessories. About $800 to $1200. Hemco Corp. 816254-1111 440
Crystal polishing kit for infrared trans mitting crystals, including KRS-5 is sup plied with grinding powder compound and Barnsite. $60. Wilks Scientific Corp. 203-838-4537 444 Four models of hydrogen purifiers with capacities ranging from 1 to 24 liters per min are available for use in gc, metallurgy, electronics, semiconduc tors, hydrogeneration, catalytic pro cesses, etc. $710 to $1815. Mathe son Gas Products. 201-933-2400 4 4 5
REAGENT ACIDS
Automatic composite sampler for liq uids collects a composite sample up to two liters over a variety of sampling periods from a positive head of 15 me ters to a suction head of 5 meters. Op tional accessories include sample tem perature control, external trigger facility, depth sampler and probe, and shut-off valve. $850 to $875. Testing Ma chines, Inc. 516-598-1400 446
Certified reagent-grade acids available in quantities from pints to tank wagons:
Models 8287 and 8289 flow controllers adjust and maintain small gas flows for analytical instrumentation; features in clude a nonrotating needle control valve, bubble-tight O-ring seal shut-off, and integral precision needle valve with nonreversing flow characteristics and high turns-to-lift ratio. Prices are $87 and $175 depending on features. Matheson Gas Products. 201-933-2400
447 Model 8430 gas chromatograph uses elution method of separation; instru ment's accuracy depends on the tem perature controller, sampling valve, two needle valves. Unit weighs only 25 lb and measures 25 χ 16 X 1 2 % in. $650. Matheson Gas Products. 201933-2400 441
B-20A refrigerated centrifuge offers large volume and high resolution capa bilities from 1000 to 20,000 rpm; six heads, including two swinging buckets, zonal rotors, most ultracentrifuge angle rotors, and a broad range of accessories are available; gravities to 45,500 xg; maximum volume, 1500 ml (6 χ 250). $3085. Damon Corp. 617-449-0800 442
Forced-flow electrophoresis pilot plant, Model 510, can be used for separation and purification of biological materials such as gamma globulin (from horse serum), enzymes (from fermentation broths); also filtration of difficult-toclarify materials. $16,000. Canalco, Inc. 301-427-1515 443
[CXO^H^CJD]
Model 7000 constant-flow sampler pro vides flow air sampling in the range of 3 to 6 cfm; useful for sampling airborne contamination in labs, hospitals, clean rooms, and processing areas. $330. Misco Scientific. 415-843-1282 448
Model 7670 automatic sampler com pletely automates measurement of sample volume and injection into the company's gas chromatographs; ca pable of unattended operation for as many as 36 consecutive samples. Hewlett-Packard, Avondale Div. 215268-2281 449
Two new data acquisition and control subsystems for use with the PDP-8 family of small computers are designed for use where low-level analog signals are encountered or when discrete digital input/output information is required. UDC8 costs $ 3 5 0 0 + ; modules vary from $120 to $480; AFC8 fully imple mented with 120 channels costs $13,200. Digital Equipment . Corp. 617-897-5111 450
Other Corco acids: Acetic · Fuming Nitric
·
Fuming Sulphuric · Formic · Hydrofluoric ·
Perchloric
·
Phosphoric
• Assured quality • Prompt delivery Corco produces only reagentand electronic-grade chem icals.
Let us know your requirements.
CHEMICAL CORPORATION Manufacturers of Reagent and Electronic Chemicals
Tyburn Road & Cedar Lane, Fairless Hills, Pa. 19030 'Phone: (215) 295-5006
Circle No. 37 on Readers' Service Card
ANALYTICAL CHEMISTRY, VOL. 43, NO. 3, MARCH 1971
·
105 A
