FUTURE ARTICLES Gas Chromatographic Analysis of Phenol and Substituted Methyl Phenol Using Open Tubular Columns J. Hrinvnak and J. Macâk Thin Layer Electrochemistry. sated Resistance G. M. Tom and A. T. Hubbard
Optimum Parameters for Flame Emission Spectroscopy with the Nitrous Oxide-Acetylene Flame G. D. Christian
and F. J.
Feldman
Further Investigation of the Colorimetric Reaction between Aromatic Isocyanates and Peroxy Compounds R. F. Layton and L. A. Knecht Colorimetric Determination of Traces of Zinc in Zinc Oxide J. M. Kruse
Minimization of UncompenDetermination of Dissolved Oxygen Using Photoreduced Leuco Phenothiazine Dyes P. A. Hamlin and J. Lambert
Solvent Effects on Protonation Constants: Ammonia, Acetate, Polyamine, and Polyaminocarboxylate Ligands in Methanol-Water Mixtures D. B. Rorabacher, W. J. MacKellar, F. R. Shu, and M. Bonavita
Quantitative Determination of Dialkyl Phosphates and Dialkyl Alkylphosphonates by Gas-Liquid Chromatography E. J. Quinn and D. H. Ahlstrom
Dynamics of Continuous Segmented Flow Analysis R. D. Begg
Polarimetric Studies of Alkali Metal Ion Complexes of D-Propylenediaminetetraacetic Acid J. D. Carr and D. G.
Continuous Electrochemical Determination of Cyanide. Application to Cyanogenic Glycosides in Sudan Grass D. B. Easty, W. J. Blaedel, and L. Anderson Computer Acquisition of Frontal Analysis Chromatographic Data for Surface Area Determination M. F. Burke and D. C. Ackerman, Jr.
Swartzfager
New Approach to the Microdetermination of Fluoride Adsorption-Diffusion Technique P. Venkateswarlu and P. Sita Thin-Layer Densitometry of Certain Malto-Oligosaccharides C. T. Mansfield and H. G. McElroy
Radioisotope Derivative Procedure for the Determination of Epinephrine or Norepinephrine W. J. Blaedel and T. J. Anderson
Some Anomalies of the Gibbs Reaction J. C. Dacre
Instrumental Peak Distortion. III. The Analysis of Overlapping Curves /. G. McWilliam and H. C. Bolton
Gas Chromatographic Determination of Polycyclic Aromatic Hydrocarbons K. Bhatia
another 1st in Gas
Chromatography
PRETESTED MOLECULAR SIEVES Now the standard material for GC analysis of 02 and N2 is available with assurance of quality. Proper preparation and pretesting of the finished product guaran tees these molecular sieves for excellent performance. Each batch is supplied with test results showing the 02/N2 separa tion under specific operating conditions. See example at left.
r
Available in all mesh sizes: PT MOLECULAR SIEVE 5A - for trace analyses PT M O L E C U L A R SIEVE 13X - for speed analyses
Separation of H2, 0 2 and N2. Column: 6' χ 1/8" copper P. W. MOLECULAR SIEVE 5A 6 0 / 8 0 . He carrier, 15 psig. at 18 ml/min. Col. temp. 24°C. Thermistor detector at 10 ma with sensitivities as shown.
For more details, write for the March/April GAS-CHROM NEWS LETTER.
Applied Science Laboratories, Inc. Post Office Box 440 / State College, Pennsylvania 16801 / 814-238-2406
Circle No. 7 on Readers' Service Card
120 A
.
ANALYTICAL CHEMISTRY, VOL. 4 3 , NO. 3 , MARCH 1 9 7 1
