Product Capsules Chromatography supplies. New catalog of materials for ion exchange, gel chromatography, adsorption, columns, and stable isotopes. A 26 Chromatography supplies. 48-page catalog on chemicals, supplies, gadgets forGC. A 42 Chromatography supplies. 12-page catalog offers all product for thin layer and column chromatography. A 66 Chromatography supplies. Column tubing in prepacked boxes, available on spools in several lengths and sizes. A 96
We Handle With Care... Elkay knows the care a laboratory must take in both the tests it performs and the equipment and supplies it uses. That's why we take extra special care in the production and delivery of our full line of glassware products. All glassware items are manufactured to meet or exceed OEM specifications and all items are guaranteed to be delivered intact and without delay. Our line of glassware includes heating bath coils, glass fittings, connectors, mixing coils and phasing coils for all auto analysis systems. For a complete catalog of products, prices, quantity discounts and list of authorized distributors, write to ELKAY.
ELK AY PRODUCTS, INC. 95 Grand Street Worcester, Mass. 01610 Tel. (617) 757-4435
Chromatography supplies. Catalog lists silica gels, cellulose powders, foils, other TLC products. A 190 Chromatography, thin layer. Streaker delivers samples which produce clean, sharp bands. Uniformly deposits predetermined sample amount on plate. A 45
Conductivity instruments. Catalog describes line of equipment and cells for lab applications. A 23 Conductivity meters. Unit has solid state circuitry, new tungsten electrode dip cell with automatic temperature compensation from 0 to 100°C. A 98 Counters. Range of units from 1 Hz to 600 MHz. Visible LED readout, computer compatibility, high input sensitivity. A105 Counting vials. Lower cost of liquid scintillât on chemicals with 7-ml capacity units. Catalog. A 147 Cryogenic systems. For spectroscopy, X-ray diffraction, magnetic resonance. Either magnetic or automatic control. Al Desiccants. Moisture remaining after drying is 0.005 mg/liter. Available regular or indicating. A 94 Electrodes, ion. Comprehensive, upto-date survey of analytical methods using specific ion electrodes. A 156 Electrodes, pH. Combination unit features special connecting cable, internal buffer, refill aperture for reference electrode. A 188 Electrometers. Unit haslinear dynamic range of > 108, and peak area accuracy will stay typically within ± 4 % over that range. A 103
CIRCLE 6 4 O N READER SERVICE CARD
110 A ·
ANALYTICAL CHEMISTRY, VOL. 44, NO. 12, OCTOBER 1972
Electrometers. Brochure illustrates 3 new models with full line of accessories. A 168 Electron microscopy. Publication devoted to electron microscopy and X-ray analysis. A 164 Environmental chambers. Line of units from economical jar type to aircooled units. A 27 Filter aids. Catalog and product file on products for filtration, extraction, absorption, electrophoresis, and chromatography. A 185 Flow meters. Compact unit for determination of hydrogen, nitrogen, helium, or air. A 161 Fluorometers. Direct-reading unit serves as colorimeter, turbidimeter, and nephelometer. Two solid state models. A 5 Fraction collectors. 4 components comprise an automatic system for monitoring and collecting liauid effluent. A 24
Gel scanners. High resolution UV unit allows pushbutton scanning of polyacrylamide gels for RNA and protein work. A 118 Helium. Diffusion cell purifier produces ultra-pure helium from commercial grades. A 63 Incubators. Incubate 60 samples in a single, self-contained unir with temperature ranges from — 5°C to +80°C. Built-in shaker provides agitation of aerobic samples. Brochure. A 195 Labels. Consecutive number labels are self-sticking, adhere to any surface. Samples. A 173 Lasers. Tunable laser from 265-340 nm with tunable dj-e laser covering visible range from 53f>-680 nm. A 37 Liquid scintillation systems. New, completely automatic system analyzes up to 300 samples. A 146 Microscopes, electron. High-resolution unit with 5A guaranteed, 4A under optimum conditions. A 165 Microscopes, polarizing. New, lowcost unit for education and routine/research applications. A 106 Mixers. 4 or more test tubes can be mixed simultaneously by vortex mixing action. Catalog. A 201
