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ÈT'S A COLORIMETER!
CURTIN...
IT'S A SPECTROPHOTOMETER.'
new GC Packing Kits help solve Column Problems
IT'S BOTH FOR ONLY
ONLY THIS B&L SPECTRONIC 20 COLOR/METER combines the fast est, most accurate colorimeter you can buy—with complete spectrophotometric capability for transmission and reflectance studies throughout the 340mu-950mu range—for less than the price of most colorimeters alone. Just dial the wavelength you need. That's all there is to it. No filters, no fussing with slit width or sensitivity controls. The Certified-Precision Grating, with constant 20m μ bandpass, instantly delivers monochromatic light of spectral purity unattainable with any other instrument... at even four times its low price. See for yourself, in your own lab.
BAUSCH & LOMB BAUSCH & LOMB INCORPORATED 60944 Bausch Street Rochester 2, Ν. Υ.
Π Please schedule a Spectronic 20 Colorimeter demonstration in my lab at my convenience. Π Please send Spectronic 20 Catalog D-266. Name (PLEASE P R I N T ) Company . A d d r e s s .. City
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ANALYTICAL CHEMISTRY
* A tradename of W. H. Curtin & Co.
W.H. CURTIN & CO. • HOUSTON · IULÎt · IKMINCHJlM · NIK fl«ll«« · Hill·!
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Circle No. 35 on Readers' Service Card 102 A
Now, with Curtin GC Packing Kits, you can try a wide variety of column packings for gas chromatography with out investing in large quantities of ex pensive materials. Three new introduc tory assortments, coated on Curtin CHROMOPAK*, give you a selection of packings for making trial separa tions with a minimum of investment and waste. Designed specifically to assist you in solving your gas chromatography prob lems, Curtin's GC Packing Kits include packing materials for use at low, medium or high column temperatures. Trial packings are furnished in 25gram bottles, a quantity sufficient for preparing the average length column. K i t " A " includes 10 selected packings, 8 of which are primarily for use with low boiling samples; 1 for medium boilers, and 1 for high boilers. Kit " B " includes 12 packings, 7 of which are for medium boiling samples, 2 for low boilers, and 3 for high boilers. Kit " C " consists of 14 packings, 9 of which are primarily for high boiling samples, 2 for low boilers, and 3 for medium boilers. Thus, with only a modest investment, you can perform numerous separations for comparison to determine the Curtin Column Packings most suitable for your work. For complete information on Curtin GC Packing Kits and Curtin Coated Column Packings, write W. H. Curtin & Company, P. O. Box 1546, Houston, Texas 77001.
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Circle No. 48 on Readers' Service Card
