Briefs
The quick and easy way t o precise density measurement·
Optically Transparent Thin-Layer Electrochemical Flow Cell for Liquid Chromatography 1542 Thomas C. Pinkerton, Kiamars Hajizadeh, Edward Deutsch, and William R. Heineman,* Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221 Anal. Chem., 52 (1980)
Direct Constant-Current Electron Capture Detector 1544 Walter A. Aue* and K. W. Michael Siu, 5637 Life Sciences Centre, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4J1 Anal. Chem., 52 (1980)
X-ray Photoelectron Spectra of Dithizone and Related Compounds 1546 A. Katrib* and A. Y. Kassim, Chemistry Department, Kuwait University, Kuwait Anal. Chem., 52 (1980)
Rotating Flow Mixing Device for Post Column Reaction in High Performance Liquid Chromatography 1548 Shin-Ichiro Kobayashi and Kazuhiro Imai,* Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113, Japan Anal. Chem., 52 (1980)
Liquid Chromatography Electrochemical Detector with a Porous Membrane Separator 1549
Measure solid concentrations, density, or specific gravity of your process liquids and gases with the Paar DMA55 density meter to assure consistent product quality. Small 0.7 ml samples from the process are injected, pumped, vacuum-suctioned or continuously flowed into the sample tube. In less than a second, the instrument calculates and displays a 5-place digital result on the readout. This can be automatically transferred to other instruments. The method is fast, simple and accurate. No need for separate temperature, weight or volume measurements. No pycnometer filling. Circle the number for full details. Mettler Instrument Corporation, Box 71, Hightstown, NJ 08520.
Kenneth A. Rubinson,* T. William Gilbert, and Harry B. Mark, Jr., Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221 Anal. Chem., 52 (1980)
Determination of Low Levels of Copper by Atomic Absorption Spectrometry with a Simplified Extraction Technique 1551 W. Orville Calhoun* and R. B. Hurley, Badische Corporation, P.O. Drawer D, Williamsburg, Va. 23185 Anal. Chem., 52 (1980) Correction. Microcomputer Compatible Method of Resolving Rate Constants in Mixed First- and Second-Order Kinetic Rate Laws 1552 Paul B. Kelter and James D. Carr,* Department of Chemistry, University of Nebraska, Lincoln, Neb. 68588 Correction. Modification of a Commercial Micrometer Hanging Mercury Drop Electrode 1552 J. E. Bonelli, H. E. Taylor, and R. K. Skogerboe, U.S. Geological Survey, Denver Federal Center, Denver, Colorado 80225
Mettler
Electronic balances and weighing systems Thermal analysis instruments Titration instruments Automated laboratory systems
CIRCLE 148 ON READER SERVICE CARD 984 A · ANALYTICAL CHEMISTRY, VOL. 52, NO. 9, AUGUST 1980
