S A N FRANCISCO
POLARAD
9:55 10:10
AUTOMATIC
10:30 10:40
RECORDING
11:00
TITRATOR
PROGRAM
Polarography of Metal-Thiosulfate Complexes. D. G. Davis. Electrode System for Measuring Dissolved Oxygen. D. E. Carritt and J. W. Kanwisher. Biographical Sketch of Professor Lingane. R. L. Pecsok. Scientific Achievements of Professor Lingane. I. M. Kolthoff. Fisher Award in Analytical Chemistry Address. 96,493 Coulombs. J. J. Lingane. P. J . Elving, Presiding
for simultaneous measurements and recording of variable and constant pH factors
2:00 2:05 2:30
Allows automatic techniques to be applied to unknown compounds, to rapidly and accurately determine: A. Ionization constants, from which are determined minimum equivalent weights, purity, and struc tural features. B. Kinetic analysis of reactions.
3:10 3:30 3:45 4:20
FEATURES: • Speeds analysis · Provides permanent record · Automatic cut-off when reagent is exhausted permits unattended operation for round-the-clock measurements of slow reactions. A port in the cell permits addition of reagents during operation · Choice of micrometer, microburet or micrometer syringe, quick substitution for rapid titrant changes · Accuracy of 0.02 pH units · Complete titration curves can be obtained within two minutes · Typical 10 cubic centimeters sample volume capacity (other capacities available to suit specific needs) · Cell temperature can be regu lated by controlled water bath (optional) · Magnetic stirrer pro vided · Range switch, which varies the ratio of titrator travel to recorder pen movement, ensuring complete on-paper plot without changing reagent concentration after a reaction has started
Scientific
Instruments
SECTION Β Symposium on Radiochemical Analysis 3.
Ν . Ε. Ballou,
CORPORATION
Circle No. 26 A-1 on Readers' Service Card, page 83 A » tge-AaWUP**,'.» # S » » t r j?
from the Greek meaning "without pressure"
OILS WAXES GREASES
These. Aptezon products have the r e c o g nition o f l e a d i n g scientists who accord them top preference f o r high vacuum w o r k . Because o f the e x c e e d i n g l y low v a p o r pressure o f all these oil distillates, at usual room temperatures, they are in g r e a t d e mand for all sorts o f high vacuum work. Their v a p o r pressures "Wre as low as 10-6 mm. Hg., a n d even unmeasuroble a t room t e m p e r a t u r e .
4.
Nondestructive Analysis and Gamma Spectrometry H . E. Menker,
2:00
As the exclusive distributor in the United States, w e o f f e r immediate d e l i v e r y f r o m stock on the complete r a n g e o f these oils ana compounds.
2:30 3:05
J A M E S G. B I D D L E C O .
3:25
Electrical and Scientific Instruments 1316 Arch Street—Philadelphia 7 , Penna.
3:45 4:05 4:25
For applications, working
4:45
list price», write f&r • Bulletin 43-A
SECTION Β :·!
Symposium on R a d i o c h e m i c a l Analysis 5.
Applications
B. F. Rider,
9:00 ν* V i U h A ^ V
Circle No. 26 A-2 on Readers' Service Card, page 83 A 26 A
•
ANALYTICAL CHEMISTRY
Presiding
Nondestructive Methods of Analysis for Radioactive Nuclides. G. W. Leddicotte and S. A. Reynolds. Neutron Photometry as a Nondestructive Analysis Method. G. W. Leddicotte and W. A. Brooksbank, Jr. Low Energy Standards for Gamma Ray Spectrometry. G. M. Matlack, J. W. Meadows, and Gilbert Nelson. Radioanalysis of Americium by Gamma Counting. Joseph Bubernak, M. S. Lew, and G. M. Matlack. Simple Subtractive Technique for Quantitative Gamma Scintillation Spectrometry. William Lee. Determination of Gamma-Ray Abundance Directly from the Total Absorption Peak. D. F. Covell. Automatic Compensation of Dead Time in Counting Equipment. D. F . Covell, M. M. Sandomire, and M. S. Eichen. Development and Preparation of a Set of Gamma Spectrometry Standards. L. J. Beaufait, Jr., Ε. Ε . Anderson, and J. P. Peterson.
-8
t B627
Presiding
Self-Absorption Studies in 4" Counting. L. Yaffe and J. B. Fishman. 9:20 Determination of Absolute Disintegration Rates Using Λπβ Proportional-7 Scintillation Coincidence Counting. Ray Gunnink, L. J. Colby, Jr., and J. W. Cobble. 9:40 Use of 4TT Scintillation Techniques for Routine Gamma Counting. L. J. Colby, Jr., and J. W. Cobble. 10:00 System for Counting Tritium as Water Vapor. \V. F . Merritt. 10:15 Intermission. 10:25 Low Level Pu211 and Tritium Analysis by Liquid Scin tillation Techniques. D. L. Horrocks and M. H. Studier. 10:50 New Alpha Counting Technique. N . A. Hallden and J. H . Harley. 11:10 Nuclear Emulsion Technique for Determination of the Pu^YPu 23 » Ratio. E. N. Sloth and M. H. Studier. 11:30 Highly Stable Beta Particle Counting System. H. A. Trcibs and J. J. Lashock.
43-20 34th Street, Long Island City 1, Ν. Υ · EXeter 2-4500
APIEZON
Counting Methods and Techniques
9:00
Division
POLARAD ELECTRONICS
Introductory Remarks. P. J. Elving. Photoelectric Autotitrator. R. H. Muller. Potential of an Electrode, Its Electrostatic and Thermodynamic Meanings. J. B. Ramsey. Versatile Instrument for Electroanalytical Studies. D. D. DeFord. Derivative Chronopotentiometry. R. T. Iwamoto. Alternating Current Polarography. Criteria for Polarographic Reversibility. H. H. Bauer and P . J. Elving. Analytical Applications of Alternating Current Polar ography. R. A. Schreiber and W. D . Cooke.
Presiding
Excitation of Characteristic X-Rays by Beta Particle Bombardment. R. H. Muller.
