Move Mead
A C BRIEFS A Word of Caution about Use of Dimethyl Sulfoxide as Solvent in Analytical Procedures DAVID L. VENEZKY, Chemistry Division, Naval Research Laboratory, Washington, D. C. 20390 Anal. Chem., 43, 971 (1971)
Aids for Analytical Chemists Ion Exchange Filter Paper Holder for X-Ray Spectrometry STANFORD L. TACKETT, Department of Chemistry, diana University of Pennsylvania, Indiana, Pa. 15701
In
Anal. Chem., 43, 972 (1971) Use of an Atomic Absorption Spectrophotometer for Colorimetric Analysis MICHAEL A. HILDON, Roan Consolidated Mines Research and Development Department, P. 0. Box 10, Kalulushi, Zambia Anal. Chem., 43, 973 (1971)
Take a giant step forward in air pollu tion monitoring. Switch to Dry Detec tion methods to monitor a wide variety of pollutants such as sulfur and phos phorus compounds, hydrocarbons and ozone found in ambient air, pesti cides, and petrochemicals. We use FPD's* FID's and chemiluminescence detectors in our instruments. These are the advantages of Dry Detection Greater detection sensitivity Greater detection Specificity Responds in seconds No leaky valves, corrosion, chemicals Lower cost to operate Minimum Maintenance Easy to operate Continuous measurement Provides greater repeatability
Raman Spectra of Trapped Gas Chromatograph Effluents BERNARD J. BULKIN, KILIAN DILL, and J. J. DANNENBERG, Hunter College of the City University of New York, 695 Park Avenue, New York, Ν. Υ. 10021 Anal. Chem., 43, 974 (1971) An Auto-Zero and Base-Line Drift Corrector for Gas Chromatography W. A. R/GGS, Shell Oil Co., Houston Research Box 100, Deer Park, Texas 77536
Laboratory,
Anal. Chem., 43, 976 (1971) An Improved Kel-F Vacuum Valve T. A. O'DONNELL, Department of Inorganic Chemistry, University of Melbourne, Parkville, Victoria 3052, Australia Anal. Chem., 43, 977 (1971) Torch Analyzer for Precise Determination of Hydrogen in Liquid Hydrocarbons DAVID LIEDERMAN and JOHN R. GLASS, Research De partment, Paulsboro Laboratory, Mobil Research & Devel opment Corp., Paulsboro, N. J. 08066 Anal. Chem., 43, 979 (1971)
"Flame Photometric Systems detect flame emissions of S0 2 , S0 3 , H Î S , Mercaptans (394 millimicrons) in hydrogen air flame. Over 1000 flame photometric systems have been put into service since 1965. Patent 3,489,498
On-Line Laser Pyrolysis Cell for Chromatography J. P. BISCAR, Department of Physics, University of Wyo ming, Laramie, Wyo. 82070 Anal. Chem., 43, 982 (1971) Generation of Clean Air to Permit Gas Chromatography without Cylinders W. H. KING, Jr., Analytical and Information Division, Esso Research and Engineering Company, P.O. Box 121, Linden, N. J. 07036 Anal. Chem., 43, 984 (1971)
Meloy Laboratories Meloy Laboratories, Inc. Instrument and Systems Division 6631 Iron Place Springfield, Virginia 22151 Phone: (703) 354-4450 CIRCLE 1 1 6 O N READER SERVICE CARD
ANALYTICAL CHEMISTRY, VOL. 43, NO. 7, JUNE 1971
·
17 A
