Briefs
Low cost relief from high purity gas pains Say g o o d - b y e to high purity gas pains. Johnson Matthey hydrogen purifiers quickly turn commercial grade hydrogen into the highest purity gas possible. A n d y o u save up to 70% in the process. The secret is a palladium alloy diffusion m e m brane that blocks out all other gases and permits only ultra-pure hydrogen to pass t h r o u g h . The exchange is efficient, consistent and economical. J o h n s o n Matthey hydrogen purifiers. Available in capacities f r o m 2 to 400 SCFH. No other product produces such high purity so economically. For additional information write: J o h n s o n Matthey Inc., Catalytic Systems Division, 436 D e v o n Park Drive, Wayne, PA 19087. Or call 215-648-8500.
Correspondence Interferences in Determination of Hydrogen Sulfide in Air by Gas Chromatography with Flame Photometric Detection 2193 Filippo Mangani and Fabrizio Brunei·*, Istituto di Scienze Chimiche, Università di Urbino, P.zza Rinascimento, 6-61029 Urbino, Italy, and Nunzio Penna, Cattedra di Michrochimica, Università di Urbino, Via Saffi, 2-61029 Urbino, Italy Anal. Chem.,55 (1983)
Ion Promotion in Fast-Atom Bombardment Mass Spectrometry by Charge Transfer Complexation 2195 E. De Pauw, Institut de Chimie, Université de Liège, B6, Β 4000 Liège I, Belgium Anal. Chem., 55 (1983)
Aids for Analytical Chemists Time-Optimized Thin-Layer Chromatography in a Chamber with Fixed Plate Lengths 2196
JOHNSON
MATTHEY
Ronald E. Tecklenburg, Jr., Rose M. Becker, Eric K. Johnson, and David Nurok*, Department of Chemistry, Indiana University—Purdue University at Indianapolis, P.O. Box 647, Indianapolis, Ind. 46223 Anal. Chem., 55 (1983)
CIRCLE 115 ON READER SERVICE CARD
Trace Determination of Low Molecular Weight Aliphatic Amines in Air by Gas Chromatography
The pH Meter That Makes It Simple...
2199 Kazuhiro Kuwata*, Emiko Akiyama, Yoshiaki Yamazaki, Hiroyasu Yamasaki, and Yoshio Kuge, Environmental Pollution. Control Center, 62-3,1 Chôme, Nakamichi, Higashinari-ku, Osaka City 537, Japan, and Yoshiyuki Kiso, Applied Physics and Chemistry, Faculty of Engineering, Hiroshima University, Shitami, Saijo, Higashihiroshima City 724, Japan Anal. Chem.,55 (1983) Effect of Copper on the Solubility of Palladium in Nitric Acid Solutions in Analysis of Electroplated Palladium Layers 2202 A. M. Szaplonczay, Bell-Northern Research, Ottawa, Ontario, Canada K1Y 4H7 Anal. Chem., 55 (1983)
The Radiometer PHM83 Autocal pH Meter features one button automatic calibration with automatic recognition of buffers and memory storage of temperature-buffer values. Microprocessor controlled the PHM83 measures pH, mV and temperature. All values are shown on a 20 character alpha/numeric display that also provides operational information. An ideal pH meter for routine laboratory work, the PHM83 can also be connected to a printer, recorder or titration system with the optional output module. For more information, contact Radiometer America, Inc., toll free 1-800RADIOMETER 321-9484. In Ohio, call 216-871-8900. COPENHAGEN
Selectivity Coefficients of a Cyanide Ion Electrode 2205 Dinko Tuhtar, Environmental Department, Republic Hydrometeorological Institute, Sarajevo, Yugoslavia Anal. Chem., 55 (1983) Correction. Hydrophillc Complexes with Protons and Metallic Ions in the Reversed-Phase Liquid Chromatography of Azaarenes 2208
Luis Antonio d'Àvila, Instituto de Quimica UFRJ, Ilha do Fundâo 21910, Rio de Janeiro;, and Grupo Quimica Indl, Ltda R, Jacurutâ 826-21021, Rio de Janeiro, Brasil, and Henri Colin* and Georges Guiochon, Laboratoire CAP, Ecole Polytechnique, Route de Saclay 91128, Palaiseau Cedex, France
World Headquarters: Emdrupvej 72, DK2400 Copenhagen, Denmark. In the U.S.: 811 Sharon Drive, Westlake, Ohio 44145 CIRCLE 181 ON READER SERVICE CARD 1286 A · ANALYTICAL CHEMISTRY, VOL. 55, NO. 13, NOVEMBER 1983
