Briefs S i m p l e M e t h o d for the P r e p a r a t i o n , S t o r a g e , and U s e of C h r o m o u s Chloride S o l u t i o n s When prepared in a polyethylene squeeze bottle with a long delivery tube, air-sensitive solutions of chromous chloride can be stored and dispensed for several weeks without significant reoxidation. Roger L. Williams and Claude W. Sill, Health Services Laboratory, U.S. Atomic Energy Commission, Idaho Falls, Idaho 83401 Anal. Chem., 46, 791 (1974)
R a p i d and C o n v e n i e n t L a b o r a t o r y M e t h o d for Extraction and Subsequent Spectrophotometric D e t e r m i n a t i o n of B i t u m e n Content of B i t u m i n o u s Sands Anew procedure with photometric repeatability of 1.26% and precision of 1.20% bitumen is described. Total time required for analysis ranges from 1 to 2 hours. Mahendra S. Patel, Product Research and Development Division, Research Council of Alberta, 11315—87 Avenue, Edmonton, Alberta, Canada T6G 2C2 Anal. Chem., 46, 794 (1974)
D e t e r m i n a t i o n of Iron in S e r u m by A t o m i c Fluorescence Flame Spectrometry The relative standard deviation for measurements of a 0.5 Mg/ml standard solution and a pooled serum sample is approximately 3%. No treatment of the sample is required prior to nebulization into a premixed acetylene-air flame. W. E. Rippetoe, V. I. Muscat, and T. J. Vickers, Department of Chemistry, Florida State University, Tallahassee, Fla. 32306 Anal. Chem., 46, 796(1974)
Correspondence R e l a t i v e Effect of M o l e c u l a r Absorption on A t o m i c Absorption and A t o m i c F l u o r e s c e n c e C. David West, Department of Chemistry, Occidental College, Los Angeles, Calif. 90041 Anal. Chem., 46, 797(1974)
Aids for Analytical Chemists S i m p l e a n d I n e x p e n s i v e T e m p e r a t u r e Controlled S p e c t r o p h o t o m e t r i c Cell Holder R. L. Wilson and J. D. Ingle, Jr., Department of Chemistry, Oregon State University, Corvallis, Oregon 97331 Anal. Chem., 46, 799(1974)
Optical D r o p F a l l D e t e c t o r for U s e w i t h a D r o p p i n g M e r c u r y Electrode Brian K. Hahn and C. G. Enke, Department of Chemistry, Michigan State University, East Lansing, Michigan 48823 Anal. Chem., 46, 802(1974)
A u t o m a t i c H i g h T e m p e r a t u r e V e n t V a l v e for a Gas Chromatograph/Mass Spectrometer Interface Douglas W. Kuehl, Gary E. Glass, and Frank A. Puglisi, National Water Quality Lab., EPA, 6201 Congdon Blvd., Duluth, Minn. 55804 Anal. Chem., 46, 804 (1974)
I n t e r n a l S t a n d a r d Addition M e t h o d for P r e p a r a t i o n of H o m o g e n e o u s P o w d e r M i x e s John J. Jaworski, Ronald A. Burdo, and George H. Morrison, Department of Chemistry, Cornell University, Ithaca, N.Y. 14850 Anal. Chem., 46, 805 (1974)
Split Crystal Ion S e l e c t i v e M e m b r a n e E l e c t r o d e s Ronald Wawro and G. A. Rechnitz, Department of Chemistry, State University of New York, Buffalo, N.Y. 14214 Anal. Chem., 46, 806 (1974)
ACS Reprint Collections Instrumentation in Analytical Chemistry Comprises 43 articles from Volumes 41 - 4 4 of Analytical Chemistry. Spectrometry, chromatography, electrochemistry, and other techniques. 428 pages 1973 Hardback $7.95, Paper $4.50. Collected Accounts of Transition M e t a l Chemistry Includes 29 articles from Volumes 1 - 4 , Accounts of Chemical Research. Structure, bonding, inorganic reaction mechanisms, organometallic compounds and reactions, biological aspects. 249 pages 1 973 Hardback $6.95, Paper $3.95. Air Pollution Contains 38 articles from Volumes 3 - 6 of Environmental Science & Technology. Laws and regulations, specific pollutants and standards, monitoring, control methods, transportation. 139 pages 1973 Hardback $5.95, Paper $3.50. Solid W a s t e s 25 articles that originally appeared in Environmental Science & Technology. Government, specific solids, mining, sewage sludge, technology. 87 pages 1971 Paper $2.00. Cleaning Our Environment. The Chemical Basis for Action 249 pages 1 969 Paper $2.75. Supplement to Cleaning Our Environment. The Chemical Basis for Action 20 pages 1971 Paper $1.00. All books postpaid in U.S. and Canada, plus postage elsewhere. Order from: Special Issues Sales American Chemical Society 11 55 Sixteenth St., N.W. Washington, D.C. 20036 ANALYTICAL CHEMISTRY, VOL. 46, NO. 6, MAY 1974 · 505 A
