Classifieds - ACS Publications - American Chemical

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N E W From The PRAXIS Corporation The Praxis M o d e l PR-102 Transient NMR Analyzer.

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USES - Proton Signals From B O T H Solids and Liquids - Τ &. T? Measurements - Free Induction Decay Plots - Polymer Crystallinity - Moisture Determination - Solid/Liquid Fat Measurements

FEATURES All Solid S t a t e T o t a l Weight 2 9 lbs. 10 m m O.D. Sample 10.7 M h z 5 Different Pulse Functions Signal Averaged Readout Digital and Analog Readout

Long and Short T e r m Leasing Available W i t h Purchase Option

Price $7300

The PRAXIS Corporation

TPC

5420 JACKWOOD, SAN ANTONIO, TEXAS 78238 AC512-684-3231 CIRCLE 9 8 O N READER SERVICE CARD

ADSORPTION FROM AQUEOUS SOLUTION

NEW

+70° TO

-10°

C

BATH CIRCULATOR (CIRCULATE LIQUID AND/OR TEST - AT WILL)

ADVANCES IN CHEMISTRY SERIES NO. 79 Fifteen papers from a symposium by the Division of Water, Air, and Waste Chemistry and the Division of Colloid Chemistry of the American Chemical Society, chaired by Walter J. Weber, Jr. and Egon Matijevid. The papers in this volume deal with many of the questions and problems relating to adsorption from aqueous solution, as well as general discussions of thermodynamic and kinetic aspects of adsorption phenomena. The papers include descriptions of the results of studies on a variety of adsorbate-adsorbent systems.

Versatile! A bath for small-part testing over a b r o a d temperature range . . . a source of tempered l i q u i d f o r circulation t o a u x i l i a r y e q u i p m e n t — all in onel Patented POWER-O-MATIC 7 0 ® Solid-State Control pro­ vides ± 0 . 1 ° C . typical temperature uniformity of l i q u i d ready for use.

2 1 2 pages with index

Q u a l i t y features include all-stainless construction, exclusive l / ό H.P. aircooled mechanical r e f r i g e r a t i o n , custom-built circulating p u m p a n d mo­ tor, external f l o w control valve, function selector d i a l t h a t details each operation.

Free set of L. C. cards with library orders upon request.

For f u l l i n f o r m a t i o n , w r i t e : Blue M Electric quarters, Blue Island, Illinois 60406.Available tory supply house.

Company; Corporate Head­ f r o m your nearest l a b o r a ­

Order from:

•

1 1 5 5 SIXTEENTH ST., N.W. WASHINGTON, D.C. 2 0 0 3 6

BLUE M

ANALYTICAL CHEMISTRY, VOL. 4 3 , NO. 14, DECEMBER

SPECIAL ISSUES SALES AMERICAN CHEMICAL SOCIETY

CIRCLE 2 4 O N READER SERVICE CARD

76 A

(1968)

Postpaid in U.S. and Canada; plus 3 0 cents elsewhere.

1971 — O u r 25th Year

®M

Cloth bound

1971

$10.00