NOW available with first and SECOND supplements at no increase in

^ from the specialists in liquid chromatography

The first $2900 high pressure LC Here's a new liquid chromatograph with all the important features you've asked for. It's our Model 3100 Liquid Chromatograph. For $2900 you get 3000 psi operation, dual wavelength UV detectors —, : (254 nm and 280 nm). ease of operation, simplicity and reliability. So whether you're buying your first, second or third LC, you'll agree that if the features are as good as we say, this instrument is a great buy. And we're ready to prove it. Let us tell you al about our 30 day free trial.

NOW

available

with first and SECOND

supplements at no increase in price. Fourth Edition offers specifications for 26 new reagents, such as acetonitrile, brucine sulfate, cyclohexane, thioacetamide, water reagent (deionized), and many more. Second supplement contains 8 new reagents, a new test for arsenic, which changes procedures for 33 reagents, revised tests for 7 reagents, and new limits for 9 reagents. 651 pages + Supplements $14.00 postpaid in U.S. and Canada; 40 cents postage elsewhere.

Chromatronix, Inc., 2743 Ninth Street, Berkeley, CA 94710. Phone (415) 841-7221

CHROMATRONIX CIRCLE 40 ON READER SERVICE CARD 98 A

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ANALYTICAL CHEMISTRY, VOL. 4 4 , NO. 1 1 , SEPTEMBER

1972

order from: Special Issues Sales American Chemical Society 1155 Sixteenth St., N.W. Washington, D.C. 20036