ALDRICH CHEMICAL COMPANY, INC. - Analytical Chemistry (ACS

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New liquid chromatography columns

1967 BEST SELLER

Better in five ways: Sharper separations. ' Thin Teflon bed supports at top and bottom fan out and collect stream with minimal mixing. 2 All types of separa" tions. Same column will do ion exchange, gel permeation, and adsorption chromatography—with downward or upward flow and recycling. 3 Chemically inert. ' Only glass and Teflon touch the stream. 4

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CHEMICAL CDMPANY, INC.

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5 Automatic sample ' injection. Cheminert™ valves will inject samples while solvent flows continuously. Valves can be actuated by automatically controlled air lines for unattended operation.

i r S FREE THE LATEST ALDRICH CHEMICAL CATALOG lists nearly 9000 compounds (including 1500 new ones never before offered). Organic reagents, organo-metallics, analytical reagents, organic intermediates, and biochemical tools PLUS common laboratory and bulk chemicals. This massive source book is divided into five color-coded sections: 1 Alphabetical 2 Analytical 3 Structural Formula 4 Class of Compound 5 Empirical Formula. And most of the compounds are in stock, ready for same-day shipment. Have you received your free copy of our Best Seller? If not, use the coupon.

ALDRICH CHEMICAL COMPANY, INC. 2371 North 30th Street, Milwaukee, Wisconsin Please send me my free 1967 Aldrich Catalog:

53210

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POSITION COMPANY ADDRESS CITY

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ZIP

Circle No. 105 on Readers' Service Card

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These columns are the latest addition to our expanding line of improved chromatography equipment. Like Chromatronix valves and fittings, they are chemically inert and designed without mixing cavities. One-inch columns are adjustable from 12 to 22 inches, half-inch columns from 6 to 12 inches. Cooling jackets are available.

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NAME

150 A

Pressurized opera" tion. Resilient end seals won't leak at pressures up to bursting point of glass column itself.

ANALYTICAL CHEMISTRY

A

ALDRICH

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CHROMATRONIX

I N C O R P O R A T E D 2743-8th St., Berkeley, Calif. 94710 Phone (415) 841-7221 Circle No. 34 on Readers' Service Card