C. H. STOELTING CO

Circle No. 33 on Readers' Service Card. TESTMATIC. BALANCE. Excitingly. Mew! For fast repetitive weighing the Test- matie Balance is a leader in its f...
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ACS MEETING PROGRAM SECTION C Symposium on Recent Advances in A n a l y t i c a l Chemistry

NOW TITRATIONS by' AUTOMATION

(Joint with Division of Chemical

C. E. Briclcer, Presiding 9:00 9:10

Make titrations a routine function for lab assistants! Cenco's new Color · Matic Endpoint Detector and Volumatic Syringe enable quick, suc­ cessive determi­ nations — just push a button and read a number. Elimi­ nates human ele­ ment and drainage er, Precise to within a few parts per thousand. Write for Bulletin 285.

10:05 11:00

W . H . Reinmuth,

2:00 2:05 2:20

CENTRAL SCIENTIFIC C O .

2:40

CENCO ®

2:55 3:10

Circle No. 33 on Readers' Service Card

3:35 3:55

TESTMATIC BALANCE

4:10

4:30 4:45

Excitingly Mew!

MODEL TYPE Optical Scale in Grams

Write for further information. Dealer inquiries invited.

T-1

2:00 2:05 2:25

T-10

T-100

2:40 3:00

Scale Divisions

0-1 g. 1-mg

0-10 a. 10-mg

0-100 g. 100-mg

Legibility with Vernier

0.1-mg

1-mg

10-mg

Weighing Time

8-Sec.

3-5 Sec.

2-3 Sec.

3:20

C. H. STOELTING CO. Analytical Balances, Micro-Manipulators, Stereotaxic Instruments, Strip Chart Recorders, Polygraphs, Research Microscopes, Kymographs 424

NORTH H O M A N AVENUE, C H I C A G O 2 4 , ILL. Circle No. 140 on Readers' Service Card

44 A

·

ANALYTICAL CHEMISTRY

Presiding

Introductory Remarks. W. H . Reinmuth, Columbia University. Continuous Differential Potentiometric Titration. M . M. Nicholson, Humble Oil and Refining Co. Design of Coulometric and Polarographic Apparatus. G. L. Booman, F . O. Cartan, Phillips Petroleum Co. An Automatic Melting Point Recorder. L. F . Berhenke, T h e Dow Chemical Co. Kinetic Masking in Thermometric Titrimetry. Joseph Jordan, The Pennsylvania State University; E . J. Billingham, Jr., Thiel College. Thermogravimetric Analysis. Temperature Limits and Rate of Heating. Alexandre Berlin, R. J. Robinson, University of Washington. X-Ray Absorption Edge Analysis. H. W . Dunn, Oak Ridge National Laboratory. Inorganic Analysis by Infrared Spectroscopy. The Solid Solution Technique. J. R. Lawson, R. Barnett, Fisk University; H . W. Morgan, Oak Ridge National Laboratory. Spectrophotometric Polarimetric Titrimetry. I. AcidBase Titrimetry with Asymmetric Indicators. II. Polarimetric Titrimetry with Metal Ions and Asymme­ tric Substances. Stanley Kirschner, D. C. Bhatnagar, Wayne State University. Elimination of Anion Interferences in Flame Spectros­ copy. A. C. West, W. D. Cooke, Cornell University. Flame Photometry Using Oxycyanogen Flames. J. W. Robinson, Esso Research Laboratories.

Monday A f t e r n o o n SECTION Β General A. M. Wilson, Presiding

For fast repetitive w e i g h i n g t h e Testmatic Balance is a leader in its field. The superb performance of this remark­ able balance was created by the world's finest Swiss craftsmen. Check it over feature by feature and you will see why. • Direct optical readout with 1000 divi­ sions on the scale. • Easy to read scale divisions 2.5 mm apart. • Scale is in direct line of sight with the pan. • The Testmatic is priced surprisingly low.

Introductory Remarks. C. E . Bricker, Princeton Uni­ versity. Precipitation Processes and Precipitation from Homo­ geneous Solution. Louis Gordon, Case Institute of Technology. Organic Analytical Reagents. F . J. Welcher, Indiana University. The Chelon Approach to Analysis. C. N . Reilley, Uni­ versity of North Carolina.

Monday A f t e r n o o n SECTION A General

No 20925 Color · Matic Endpoint Detector.$595.00 No. 20926 Volumatic Syringe $295.00 A Subsidiary o f Cenco fnsfrumenfs Corporation 1 7 0 8 Irving Park R o a d · Chicago 1 3 , Illinois Branches a n d Warehouses—Mountainside, N. J. Boston · Birmingham · Santa Clara · Los Angeles · Tulsa Houston · Toronto · Montreal · Vancouver · Ottawa

Education)

3:55 4:15 4:30

Introductory Remarks. A. M . Wilson, Wayne State University. The Solvent Extraction of Inorganic Ions with Sur­ face-Active Agents. A. M. Wilson, L. B . Churchill, Wayne State University. Foam Fractionation of Organic Compounds by Means of Added Foaming Agents. B. L. Karger, L. B. Rogers, Massachusetts Institute of Technology. Bis(di-n-hexylphosphinyl)methane. A New Metal Extractant. J. W. O'Laughlin, C. V. Banks, Iowa State University. Thionin Derivatives in the Extraction and Direct Pho­ tometric Determination of Boron. Laszlo Pasztor, J . D. Bode, Jones and Laughlin Steel Corp. Countercurrent Extraction of Rare Earth Chelates. G. W. Pope, W. F . Wanger, J. F . Steinbach, University of Kentucky. Extraction of Calcium with 8-Quinolinol. James Katekaru, Henry Freiser, University of Arizona. Homogeneous Precipitation of Aluminum 8-Quinolate. L. C. Howick, University of Arkansas; W . W. Trigg, Arkansas Polytechnic College. Detection and Estimation of Polyoxyethylene Glycol in Nonionic Surfactants by Ascending Paper Chroma-