New Products Jacketed thermal column for thermal elution chromatography measures 2.5 X 30 cm. Jacket and column form an in tegral unit made from borosilicate glass. The column is rated for temperatures up to 100°C, pressures to 0.1 kg/cm 2 . $75. Bio-Rad Laboratories. 415-234-4130 421 Dual-wavelength filter photometer for the simultaneous monitoring of multi color systems by a two-color, split-beam detection system has a built-in calibra tion circuit for easy calibration of any of the six optical density spans. $1985. Technical Consulting Services. 215-9472275 422 Model DMSP-II double-beam microspectrophotometer measures light absorbance or transmittance of micro scopically small specimens and makes both quantitative and qualitative analy ses over the spectral range of 240-700 nm. The instrument includes xenon and tungsten light sources, strip-chart re corder, reflecting, fluorite and achromatic objectives, and two wide field eyepieces. $18,000 to $28,000. Olympus Corp. of America. 516-488-3880 423 Ρ 602 microcomputer system for on-line and off-line instrument data reduction ac cepts various electronic interfaces made by Bainbridge Research and Develop ment, Inc., P.O. Box 237, Bainbridge Island, Wash. 98110, for connection to liquid scintillation counters, Auto-Analy zers, digital multimeters, and other scientific instruments. The microcorfiputer costs $3980; a special input/output adapter is $275; interfaces range from $1240 to $1980 or can be customized. Olivetti. 212-371-5500 424
Kohn electrophoresis unit is 6 units in 1 Here's real versatility. The Shandon Electrophoresis Apparatus after Kohn \ —designed for maximum flexibility, convenience and economy—easily per forms these six techniques: (1) Cellu lose Acetate . . . with a range of bridge gaps from 1 cm to 2 1 cm in 1 mm > r steps you get unrivaled economy with ^ " expensive media . . . unit is ideal for large-scale, small-scale and micro techniques, also short distance HVE; (2) Starch, Agar and Polyacrylamide Gels . . . for superb resolution . . . and for immuno techniques; (3) Paper . . . outstanding simplicity and convenience on all runs; (4) Micro-immuno and Crossed-over Techniques . . . no need to improvise, special accessories do the job with no trouble; (5) Thin Layer (TLE) . . . real advantages in many types of separation . . . fast set-up time, fine results; (6) Cooled Platen Work . . . for separations at higher voltages . . . avoid denaturation of sample . . . ideal for enzyme work. Send for catalog U77, that details all of the advantages and accessories of this versatile apparatus, to Shandon Southern Instruments, Inc., 515 Broad St., Sewickley, Pa. 15143.
SHANDON P I T T S B U R G H
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WHEN YOU WANT TO BE SURE that your fuel supplies are within prescribed limits for SULFUR
Digital photometer indicator can be at tached to spectrophotometers to provide four-digital BCD numerical display of absorbance, concentration, concentra tion factor, and transmission. Optilab Model 802B gives up to 0.2% accuracy by transforming the detector signal into a digital value by a voltage ramp to fre quency converter. Accessories include printer, remote control, and timer for kinetic reactions. $975. Kronk Scien tific Instruments. 603-883-2033 425 Model JSX-60S, X-ray spectrometer can automatically measure up to 30 preset elements on any one of six specimens. Presettable conditions for measurement include 30 elements, 20 angle, detector, slit width, six analyzing crystals, reflec tion degree, measuring time, and ab sorber; conditions are set by card pro gramming. The tabletop operating unit is separated from the goniometer, so measurements can be made by remote control. $56,000. JEOL, Ltd. 617-396-8620 426
You can rely on sulfur values as determined by the PARR bomb combustion method using ASTM D129, D271 and related standard techniques. All of the equipment you will need to determine sulfur, halogens and other elements in combustible solids and liquids is provided in the PARR 1901 Oxygen Bomb Combustion Apparatus. Spec. 1900 gives complete details. May we send you a copy?
PARR INSTRUMENT
UVVL
COMPANY
211 Fifty-Third St. Moline, I I I . 61265 Telephone ( 3 0 9 ) 762-7716
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ANALYTICAL CHEMISTRY, VOL. 44, NO. 12, OCTOBER 1972
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