NEW PRODUCTS
SECOND IN ORION'S NEW SERIES OF CHEMICAL SENSING ELECTRODES MEASURES WATER HARDNESS DIRECTLY
measure divalent ion activities Direct measurement of water hardness is just one application of Orion's new Divalent Ion Electrode. The electrode is equally sensitive to Ca + + and Mg + + , is slightly less sensitive to Ba+ + , and slightly more sensitive to Z n + + , Ni + +, Fe+ + , Cu + + , and S r + + . These ions can be sensed even in the presence of monovalent cations. Fraction collector, designed to collect successive chromatographic fractions, offers contamination protection of the collected samples in a totally en closed cabinet. Modular plug-in ac cessories are available for all modes of collection; time-volume, drop count ing, volumetric siphons, and photo electric constant volume sampling. Automatic stop switch and event marker outlets are provided. Chroma tography Corp. of America, Box 3 6 2 , Carpentersville, III. 6 0 1 1 0 421
The electrode has applications in research studies of stability constants, precipitation, rates of corrosion and scale formation.
WATER HARDNESS MEASUREMENT Since the electrode is equally sensitive to cal cium and magnesium, it can be used for direct, continuous measurement of total water hardness. It permits direct measurement of calcium-mag nesium, calculated as carbonates, to the 2 ppm level despite the presence of 500 ppm sodium chloride. Hardness may be determined over the 1-100,000 ppm range with speed and reproducibil ity characteristic of good pH electrodes. Direct measurement is a vast improvement in speed and convenience over older indirect gravimetric and titrimetric methods.
Spectroradiometer Model 301 high-speed emission-ab sorption spectroradiometer consists of a source unit, a receiver unit, and a remotely located control and recording unit. Emission and absorption meas urements are made simultaneously through the same optical path. The signals are separated electronically and displayed separately. Measurements can be made at any wavelength be tween 3000 A. and 9 microns. The Warner & Swasey Co., 32-16 Downing St., Flushing, Ν. Υ. 11354. 422 Multi-Purpose
NEW CHEMICAL SENSING PRINCIPLE The new electrode is used with a conventional expanded scale pH meter. The Orion electrode uses an entirely new principle of chemical sens ing. In place of the glass sensing membrane of a conventional pH electrode, this unit uses a thin porous membrane containing a water-immis cible organic ion exchanger. Unlike fragile glass electrodes, the Orion electrode is made of un breakable, corrosion-resistant fluorocarbon plastic. AVAILABILITY The new electrode is available from major lab oratory supply houses in complete kit form with supplies for up to two years normal use. It is priced at $145.00.
Extractor
This unit offers three types of extrac tion: solid/liquid, liquid/liquid up ward displacement, and liquid/liquid downward displacement with rapid con version from one type to another. The 5-1 iter multi-purpose extractor provides solvent recovery and features taps for rapid draining and a triple coil con denser. Quickfit Reeve Angel, Inc., 1 Bridewell PL, Clifton, N. J. 07014 423 Oscillograph Model 447 recording oscillograph uses a new electronic drive permitting the user to specify any of 1000 chart speeds, from 0.1 inch/second to 100 inches/second. The instrument also features automatic record length based on time, a continuously variable remote speed control, and remote control op tions. Century Electronics and Instru ments, 6540 E. Apache St., Tulsa, Okla. 74115 424
The S i v a l e ^ ' i o - Lici_:rci..c, Model $M2, >s it'e SPCC·"-: ·η a
™niOHe5i« SpiKift ion ele^jcf.'?!, JJrorft. Orion Research inr/srju.=• raWei, '.First wa* t'-c r,|ii:.ur·. " Activity Etecnauf. ::c«ie\ •·?•> ·•
CONDENSED SPECIFICATIONS Concentration range: 10-5 —io° moles/liter CaCI 2 Selectivity: Equal for calcium and magnesium pH range: 5 to 11 pH Temperature range: 0° to 50°C. Electrical resistance: 25 megohms at 25°C.
Π Please send a copy of the Divalent Ion Electrode bulletin. Π Please arrange a demonstration through my laboratory supply dealer. Name Organization Street
City.
State
Zip-
Laboratory Supply Dealer.
ORION R E S E A R C H I N C O R P O R A T E D Dept. B,
11 Blackstone St., Cambridge, Mass. 02139/Tel: (617) UN 4-5400 J Circle No. 109 on Readers' Service Card VOL. 38, NO. 8, JULY 1966 ·
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