Product Capsules

Spectrophotometers, UV/VIS. Unit features 5-position cell programmer, multizero multi-range modules, tem­perature readout, wavelength program­mer. A 217

Spectrophotometers, visible. Wave­length range is 346-600 nm, extendable to 950 nm with an inexpensive photo­tube and filter accessory. A 27

Spectrophotometers, visible. Sam­pling versatility and performance at low cost. Accepts virtually any test tube or cell. Three interchangeable sample compartments. A 28

Supply house. 1,424 page catalog available on letterhead request. A 202

Syringes. Inject samples at 0.1 μ\ with new, all-metal, sub-microliter liquid in­jector. Catalog. A 96

Thermal analyzers. System can be hooked up with computers, teleprinter, has flame ionization detection capabili­ties. A 50

Timers. Six decade preset 10 MHz scaler, synchronized start. A 138

Titrators. Automatic unit features simple programming controls. Bro­chure. A 140

Towels. Lintless, highly absorbent towels for cleaning and polishing. Sam­ple. A 187

Tubing. Specially processed standard vinyl tubing cut to 15" lengths, with color-coded wishbone bridges. Catalog.

A 63

UV monitors. New absorbance detec­tor gives superior resolution, detects very low concentrations, gives easily quantifiable curves. Bulletin. A 35

Voltmeters. New, autoranging, digital multimeter for in-probe display is bat­tery operated, has high-speed readout.

A 122

X-ray analyzers. System based on en­ergy dispersion rather than wave­length dispersion. Simultaneous analy­sis of all elements from sodium thru uranium. Brochure. A 64

New Price List! Materials for: Ion exchange, Gel chromatography, Adsorption,

Gel electrophoresis, Hollow fiber technique. Columns and Stable isotopes.

B i o - R a d ' s Price List X is the most detailed guide p u b l i s h e d anywhere on materials for the techniques listed above. New items featured in Price List X include Hollow Fiber Devices for desalting, concentrating and fractionating proteins, enzymes, viruses and othei biomolecules.

You'll also find 3 new

pages on gel intermediates

for a f f i n i t y c h r o m a t o g ­raphy and com­

plete details on mater ia ls and

equipment for gel electrophoresis. A

new applications index and a new easy-to-use for­

mat makes X our most useful cat­alog yet. For your FREE copy, contact:

BIO-RAD Laboratories 32nd & Griffin Ave.. Richmond, CA 94804, Phone (415) 234-4130

Also in: Rockville Centre, Ν. Υ.: St. Albans. England; Milano; Munich CIRCLE 26 ON READER SERVICE CARD

Shandon gets to the bottom of your chromatography tank problems

The bottom of a Shandon Model 500 Panglas* Chromatank' is different because it's absolutely flat. Press molding eliminates the mound found at the bottom of ordinary tanks, giving you an even distr ibu­tion of solvent throughout the tank and saving sol­vent, especially in ascending techniques.

Press molding also gives the Panglas Chromatank stronger corners and heavier walls. It's made entirely of glass, without metal or plastic fitt ings, to eliminate solvent contamination.

The Model 500 is the largest tank of its kind, measuring 20" χ 8" χ 22" high, accommodating either sheets or strips for ascending or descending chromatography. It will also accept 46 cm by 57 cm sheets making it ideal for two-way chromatography.

For more information, write for Bulletin L383, Shandon Southern Instru­ments, Inc., 515 Broad Street, Sewickley, Pa. 15143 (Pittsburgh District).

S H A N D O N P I T T S B U R G H L O N D O N F R A N K F U R T

CIRCLE 194 ON READER SERVICE CARD

ANALYTICAL CHEMISTRY, VOL. 4 4 , NO. 1 1 , SEPTEMBER 1972 · 111 A

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