New Products
Purify solvents inyourown laboratory Isocap 3 0 0 / a features automatic program selection of 12 analysis conditions for up to 300 beta-isotope-labeled samples. The basic system consists of a 300-sample bidirectional sample changer, automatic programming of 12 analyzer windows, pushbutton controllers for sample changer operation and display readout, and terminator switches for selection of time, count, and low-count rejection parameters. Basic price is under $11,000. Nuclear-Chicago. 312-298-6600 425
for synthesis reactions biological testing chromatography spectroscopy dehydration
Motorized chart inspector accepts any width chart paper from less than 1 in. to 12 in.; its ratings are 120 or 240 V, 50 or 60 Hz; Charts can run forward or backward; viewing area is 16 in.; the instrument weighs 17 lb and costs $225. Esterline Angus. 317-632-6501 426 RS-l gc identifier is a double-beam grating spectrophotometer that mea sures gc fractions by ir as they elute from the gc column. Scan time from 215 to 15 microns is six sec; the scan may be repeated every eight sec. Spec tra are recorded on preprinted, con tinuous linear wavelength charts. Fractions as small as 0.05 μ\ may be identified. OCLI Instruments. 203853-2224 427 Hollow-fiber dialyzer removes or ex changes salts in one-tenth the usual time; two liters can be desalted in three to five hours. $600 to $700. In addition, the company has Centriflo membrane cones capable of retaining Bence Jones proteins and other macromolecules upward of 20,000 to 30,000 molecular weight for rapid concentra tion in standard lab centrifuges. $0.50 to $3.00 each. Amicon Corp. 617862-7050 428
Purify solvents easily and inexpen sively by passing them through a column of WOELM Active Alumina Adsorbent. For complete informa t i o n about this technique, write for Application Note No. 1 0 1 , " P u r i f i cation of Solvents by Active A l u m i na." Waters Associates, Inc., 61 Fountain St., Framingham, Mass. 0 1 7 0 1 . Phone (617) 879-2000.
WATERS ASSOCIATES 5071
Circle No. 194 on Readers' Service Card
ANALYTICAL CHEMISTRY, VOL. 43, NO. 4, APRIL 1971
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