CONTRIBUTED ARTICLES Absorption-Emission Intensity Ratio Measurements in Flame S p e c t r o p h o t o m e t r y . R. K. Skogerboe, Rosemary Todd, and G. H. Morrison
A R a p i d Determination o f Rhodium a n d Palladium Using Liquid-Liquid Extraction with Tricapryl M o n o methyl Ammonium Chloride a n d Flame Photometry. M. H. Campbell
S p a r k Source Mass Spectrographic Analysis o f Tobacco Ash. R. M. Jones, W. F. Kuhn, and Charles Varsel
6
Thermometric Titration Determination o f Δ Η ° , A G ° , a n d A S ° o f Dissociation o f Ephedrinium a n d Pseudoephedrinium Ions. R. J. Raff a, M. j . stem, and Louis Malspeis
70
Lanthanum H e x a b o r i d e as a n for Electrochemical Studies. Fletcher III
78
Electrode M a t e r i a l D. J. Curran and K. S.
10
Electrochemical Reduction o f S u p e r o x i d e Ion a n d O x i dation o f H y d r o x i d e Ion in Dimethylsulfoxide. A. D. Goolsby and D. T. Sawyer
83
13
Electrochemistry o f Osmium in Sodium H y d r o x i d e Solutions. + 8 , + 6 , a n d + 4 States. J. G. Connery and R. E. Cover
87
Column C h r o m a t o g r a p h i c S e p a r a t i o n o f N i o b i u m , T a n t a l u m , M o l y b d e n u m , a n d Tungsten. J. S. Fritz and L. H. Dahmer
20
Response o f a Thermal Conductivity Microdetector in G a s e s o f Low Thermal Conductivity. R. L. Pecsok and M. L. Windsor
92
Ion Exchange Dissolution M e t h o d for Silicate Analysis. Kuppusami Govindaraju
24
Direct Current Discharge Spectral Emission-Type D e tector. R. S. Braman and Alexander Dynako
95
27
Specific Interactions Affecting G a s C h r o m a t o g r a p h i c Retention for M o d i f i e d Alumina Columns. D. J. Brookman and D. T. Sawyer
Ί 06
G a s C h r o m a t o g r a p h i c Analysis o f Isomeric Diaminotoluenes. L. E. Brydia and Friso Willeboordse
110
Adsorptive Properties o f Terephthalic Acid in R e l a tion to Its Use as a Solid Support in G a s C h r o m a tography. Hiroshi Miyake, Mitsuyuki Mitooka, and Tadashi Matsumoto
113
Efficiency of C h r o m a t o g r a p h i c Columns Connected in Series. N o n a d d i t i v i t y o f Theoretical Plates in Chromatography. Joel Kwok, L. R. Snyder, and J. C. Sternberg
118
R a p i d Procedure for the Chloroacetylation of M i c r o g r a m Quantities o f Phenols a n d Detection b y Elec tron-Capture G a s Chromatography. R. J. Argauer .
122
G a s C h r o m a t o g r a p h i c Microestimation o f A c e t y l choline a n d R e l a t e d Compounds. D. J. Jenden, Israel Hanin, and S. I. Lamb
125
Experimental Evaluation o f Indeterminate Error in H e i g h t - W i d t h a n d Height O n l y Measurements o f C h r o m a t o g r a p h i c Peaks. D. L. Ball, W. E. Harris, and H.W. Habgood
129
Determination o f Olefinic Unsaturation b y tion. J. S. Fritz and G. E. Wood
134
Real-Time D a t a Acquisition, Display, a n d Subsequent Processing in High Resolution Mass Spectrometry. A. L. Burlingame, D. H. Smith, and R. W. Olsen
C o m p l e t e Analysis of Uranium—Niobium—Zirconium A l loy b y X - R a y Absorption Edge Technique. J. H. Stewart, Jr., T. H. Barton, Jr., and M. R. Ferguson
Spectrophotometric Determination o f Nitric O x i d e in Dinitrogen T e t r o x i d e . C. M. Wright, A. A. Orr, and W. J. Balling
The Role o f Adduct Formation in the Extraction o f Zinc Substituted 8-Quinolinols. Fa-Chun Chou and Henry Freiser
H e a t s a n d Entropies o f Formation o f M e t a l Chelates o f C e r t a i n 8-Quinolinols, Quinoline-8-Thiols, a n d 2,4-Pentanedione. George Gutnikov and Henry Freiser .
Calculation o f Distribution Coefficients in Inorganic G e l C h r o m a t o g r a p h y . Dennis Saunders and R. L. Pecsok
M o l e c u l a r Size Analysis Using G e l Permeation Chro matography. J. G. Hendrickson
29
34
39
44
49
R a p i d Calculation o f Sensitivities, Interferences, a n d O p t i m u m Bombarding Energies in 3 H e Activation Analysis. Enzo Ricci and R. L. Hahn
54
Zone Refining for the S e p a r a t i o n o f Radioactive T r a c e Contaminants from O r g a n i c Compounds. Bod ο Diehn, F. S. Rowland, and A. P. Wolf
60
Use o f P o l a r o g r a p h y a n d Pulse-Polarography in the Determination of the Kinetic P a r a m e t e r s o f Totally Irreversible Electroreductions. K. B. Oldham and E. P. Porry
65
Bromina-
Precision S t a n d a r d i z a t i o n of Ceric Sulfate Solutions. A. J. Zielen VOL. 40, NO. 1, JANUARY 1968
·
139 3 A
CONTRIBUTED ARTICLES The Association of W a t e r with Various Mono- and Bifunctional Phosphine Oxides in Carbon Tetra chloride. J. W. O'Laughlin, J. J. Richard, J. W. Ferguson, and C. V. Bank»
Conductometric Determination of Sulfur in Beryl lium Oxide Ceramics Using Induction Heating and Peroxide Absorption. J. F. Chapman and 1 46
Logarithmic Distribution Coefficients of Rare Earth Compounds Fractionally Precipitated from Homo geneous Solution. F. H. Firiching, G. W. Alon, R. S. Bakowski, M. R. Koltz, H. N. Meggos, G. D. Melm, T. R. Paul, M. J. Smith, and J. D. White
Malcolm Thackray
Effect of Silicone Grease on Diffusion of Fluoride. D. R. Taves
152
1 57
204
Thin-Layer Chromatography of the Malto-,Oligo-, and Megalosaccharides. C. N. Huber, H. o. Scobeil, Han Tai, and E. E. Fisher
Viscosity of Liquid W a t e r from 2 5 ° to 1 5 0 ° C, Measurements in Pressurized Glass Capillary Vis cometer. Alexander Korosi and B. M. Fabuss
202
207
Standardization of Osmium(VIII) Solutions by Potentiometric Titration with Chromium(ll) Sulfate. Louis Meites and R. E. Cover
209
Study of Cerium(IV)-Thallium(l) Reaction and Anal ysis of Thallium(l) Mixtures by Kinetic Differences. G. H. Schenk and W. E. Bazzelle
1 62
Mechanism of the Determination of Phosphorus with a Flame Ionization Detector. F. M. Page and D. E. Wooley
210
Acidic Denitrosation and iodometric Determination of N-NitroSO Compounds. and S. I. Miller
Joseph Gal, E. R. Stedroniky, 1 68
Simultaneous Determination of Iron-55 and Stable Iron by Liquid Scintillation Counting. F. j . Cosolito, Norman Cohen, and H. G. Petrow
213
Determination of Oxygen-Zirconium Ratio in O x y g e n Deficient Zirconia. Chase, and W. M. Henry
R. E. Heffelflnger, C. T. Lifsey, D. L. 171
Calorimetric Determination of log Κ, Δ Η ° , and AS° from Thermometric Titration Data. Extension of the Entropy Titration Method to Intermediate pK Ranges (4 < p K < 1 0 ) . and R. M. Izatt
Rapid Gas Chromatographic Separation of Hydro carbons over 2 0 0 ° C below Their Boiling Points Using W a t e r as Liquid Phase. B. L. Karger and Arleigh Hartkopf
J. J. Christensen, 0. P. Wrathall, 1 75
Amperometric Determination of Sulfur in Plutonium Sulfide and Plutonium—Uranium Sulfide Ceramic Fuels.
An Automatic Group Separation System for the Simultaneous Determination of a Great Number of Elements in Biological Material. Recovery and Reproducibility Studies. and Ove Landstrom
Η. Β. Evans and Shiro Mori
The Recoil Technique and Its Possible Use in Acti vation Analysis. R. L. Hahn
and Takao Toryu
181
1 87
G. G. Guilbault, Paul Brignac, Jr., and 1 90
221
Preparation of Very Pure Hexafluorobenzene ( > 9 9 . 9 9 % ) by Directional Freezing. F. D. Evans, Michael Bogan, and Rubin Battino . . . .
Advantage of a Multidiameter Separation Column in Gas Chromatographic Analysis of Organics. J.Q.Walker
224
226
Gas Chromatographic Determination of Diethylene Glycol in Poly(Ethylene Terephthalate). L. H.
Notes
Ponder
Separation of Alkali Metals from Alkaline Earths and Other Elements b y Cation Exchange G i r o - ' matography in Nitric Acid. F.w. E. Strelow, J. H. J. Coetzee, and C. R. Van Zyl
1 96
W. J. de Wet and G. B. Behrens ANALYTICAL CHEMISTRY
Spectrophotometric Determination of Hydrogen Peroxide in Aqueous Media with 1,2-Di-(4PyridyDEthylene. T. R. Hauser and M. A. Koiar. . .
229
231
Use of Deuterium-Labeled Trimethylsilyl Deriva tives in Mass Spectrometry. J. A. McCloskey, R. N.
A Highly Sensitive Spectrophotometric Method for the Determination of Rare Earths and Nickel.
·
219
Very Lightly Loaded Textured Glass Beads as Sup port for Gas-Liquid Partition Chromatography. H. L. MacDonell
Homovanillic Acid as a Fluorometric Substrate for Oxidative Enzymes. Analytical Applications of the Peroxidase, Glucose Oxidase, and Xanthine
4 A
217
Knul Samsahl, P. O. Wester,
Quantitative Determination of Rare Earths in Yttrium O x i d e by Spectrophotoluminescence. Lyuji Ozawa
O x i d a s e Systems. Mary Zimmer
215
200
Stillwell, and A. M. Lawson
233
THREE Good Reasons Buchler is the First Name in Flash Evaporators
CONTRIBUTED ARTICLES A Differential Interference Refractometer. Thorndike and A. P. Marion
Ε. Μ. 236
Quantitative Gas Chromatographic Determination of Free Adipic Acid. D. E. Gross and H. B. Tinker. .
239
Consecutive Titrimetric Determination of Boron and Nitrogen in Amineboranes. H. c. Kelly
240
A Technique for Increasing the Solvent Properties in Proton Magnetic Resonance Spectrometry. H. A. Szymanski, J. J. Antkowiak, and L. A. Bauman, Jr. .
243
Coulometric Titration of Polonium at the Microgram Level. R. C. Props»
244
Universal Models for batch or Continuous Opera tion. Heavy Duty Performance. From $237.00 Correspondence
m Portable Model with Dewar Condenser. Performs evapora tion of heat sensitive materials at room temperature. Continu ous feed. $236.70
3
Continuous Ultrasonic Nebulization and Spectrographic Analysis of Molten Metals. Velmer Fassel and George Dickinson
24/
The Effect of Static Magnetic Field on Polarography. Shizuo Fujiwara, Hiroki Haraguchi, and Yoshio Umezawa
249
Aids for Analytical Chemists Application of Differential Thermal Analysis to Thin Layer Chromatography, R. v. Mangraviie .
Portable Model with Spiral Condenser. Eliminates need for separate cooling arrange ment. Temperature con trolled water bath. $344.50
To evaporate aqueous solutions, high boiling point solvents, strong acids, alkalis and radio active materials without contaminating back-drip. Distillation occurs only within glass and teflon, preventing contamination. Balanced design permits smooth rotation without drag and larger output with out loss of material. Continuous feed of solution or inert gas. No O-rings or washers necessary. Also available with temperature-controlled water bath. Easy convertibility from one model to another. Send for Bulletin AC-FE-1000B.
LABORATORY
APPARATUS·PRECISION
A
Colorimetric Method for Determination Glycols. K. C. Leibman and Eisa Ortiz
250
of
Ultrasonic Sprayer for Atomic Emission and A b sorption Spectrochemistry. C D . West
251
253
A Chemically Selective Polarographic Detector for Gas Chromatography. R. P. Van Duyne and D. A. Aikens 254 Method for Accurate Measurement of Small Tem perature Differences. N. E. Vanderborgh and W. Dale Spall 256 Improved Method for Preparative Layer Chroma tography. M. H. Stutz, W. D. Ludemann, and Samuel Sass
258
A Simple Method for Determining the Volume of Closed Containers. C. A. Seitz and D. E. Emerson .
260
A Microcalorimeter Especially Suited for the Study of Small Quantities of Materials. W. J. Evans, E. J. McCourtney, and W. B. Carney
262
INSTRUMENTS
B U C H L E R I N S T R U M E N T S , INC. 1 3 2 7 1BTH S T R E E T , FORT UEE, N E W J E R S E Y Circle No. 176 on Readers' Service Card See ACS Laboratory Guide fo.r All Products/Sales Office 6 A · ANALYTICAL CHEMISTRY
07024
