c h a n g e s t h e s i g n a t u r e of t h e s e effects upon N M R spectra. High-resolution t e c h n i q u e s h a v e b e e n successful in se lectively m e a s u r i n g each of t h e s e in t e r a c t i o n s , including t h e i r isotropic a n d anisotropic c h a r a c t e r i s t i c s , as well as t h e o r i e n t a t i o n s of t e n s o r axes w i t h r e s p e c t t o m o l e c u l a r frames. H i g h - r e s olution, liquidlike s p e c t r a a r e now at t a i n a b l e , in p r i n c i p l e , for all 118 N M R - a c t i v e nuclei in t h e periodic table.
References (1) Cheung, T.T.P.; Gerstein, B. C ; Ryan, L. M.; Taylor, R. E.; Dybowski, C. R. J. Chem. Phys. 1980, 73, 6059-67. (2) Murphy, P. DuBois; Taki, T.; Gerstein, B. C ; Henrichs, P. M.; Massa, D. J. J. Magn. Reson. 1982,49, 99-106. (3) Cheung, T.T.P.; Gerstein, B. C. J. Appl. Phys. 1981,52, 5517-28. (4) Suwelack, D.; Rothwell, W. P.; Waugh, J. S. J. Chem. Phys. 1980, 73, 2559-69. (5) Schaefer, J.; Stejskal, E. O.; Steger, T. R.; Sefcik, M. D.; McKay, R. A. Macromolecules 1980,13,1121-26. (6) Garroway, A. N.; VanderHart, D. L.; Earl, W. L. Philos. Trans. R. Soc. Lon don 1981, A299, 609-28. (7) Schaefer, J.; Stejskal, E. O. Top. Car bon NMR Spectroscopy 1979, 3, 283324. (8) Opella, S. J.; Hexem, J. G.; Frey, M. H.; Cross, T. A. Philos. Trans. R. Soc. Lon don 1981, A299, 665-83. (9) Zumbulyadis, Nicholas; Henrichs, P. M.; Young, R. S. J. Chem. Phys. 1981, 75, 1603-11. (10) Opella, S. J.; Frey, M. H. J. Am. Chem. Soc. 1979,101, 5854-56. (11) Murphy, P. DuBois; Cassaday, T. J.; Gerstein, B. C. Fuel 1982, 81,1233-40. (12) Schaefer, J.; Kier, L. D.; Stejskal, E. O. Plant Physiol. 1980, 65, 254. (13) Gerstein, B. C ; Murphy, P. DuBois; Ryan, L. M. "An Estimation of Average Polynuclear Aromatic Ring Size in an Iowa Vitrain and a Virginia Vitrain"; Adv. Chem. Series 1981,192,15-22. (14) Bartuska, V. J.; Maciel, G. E.; Schae fer, J.; Stejskal, E. O. Fuel 1977,56, 354-58. (15) Gerstein, B. C ; Murphy, P. DuBois; Ryan, L. M. In "Coal Structure"; Meyers, R. A., Ed.; Academic Press: New York, 1982; Chapter 4, pp. 87-129. (16) Balimann, Giovanni; Burgess, M.J.S.; Harris, R. K.; Oliver, A. G.; Packer, K. J.; Say, B. S.; Tanner, S. F.; Blackwell, R. W.; Brown, L. W.; Bunn, Alan; Cudby, M.E.A.; Eldridge, James W. Chem. Phys. 1980, 46, 469-75. (17) Myher, P. C ; Yannoni, C. S. J. Am. Chem. Soc. 1981,103, 230-32. (18) Maricq, M. M.; Waugh, J. S. J. Chem. Phys. 1979, 70, 3300-3316. (19) Aue, W. P.; Ruben, D. J.; Griffin, R. G. J. Magn. Reson. 1981,43, 472-77. (20) Munowitz, M. G.; Griffin, R. G.; Bodenhausen, G.; Huang, T. H. J. Am. Chem. Soc. 1981,103, 2529-33. (21) Tutunjian, P. N.; Waugh, J. S. J. Chem. Phys. 1982, 76,1223-26. (22) Eckman, R.; Alia, M.; Pines, A. J. Magn. Res. 1980,47,440-46. (23) Oldfield, E.; Schramm, S.; Meadows, M. D.; Smith, Κ. Α.; Kinsey, R. Α.; Ackerman J. J. Am. Chem. Soc. 1982,104, 919-21. (24) Bodenhausen, G. Prog. NMR Spectrosc. 1981,14, 137-73. The author's work is supported by the Office of Basic Energy Sciences of the U.S. Department of Energy under Contract No. W-7405-Eng-82.
CLASSIFIED SECTION
POSITIONS OPEN
GAS C H R O M A T O G R A P H Y Join the leading producer of instrumentation for the custody transfer of oil and natural gas. We seek a creative growth oriented professional who will develop and apply technology in new and innovative ways. Minimum qualifications include an MS in Organic or Analytical Chemistry (Ph.D. Preferred) and a track record of at least 5 years in gas chromatographic development. Responsibilities include concept determination/evaluation and direction of product development for new process gas chromatograph products and systems. Our rapid growth is conducive to professional advancement and we offer a competitive compen sation and benefit package. For strict confidential consideration please send resume to: John Naber, Vice President, Engineering DANIEL INDUSTRIES, INC.—ELECTRONICS DIVISION 9753 Pinelake, P.O. Box 55435, Houston, Texas 77255 (713) 827-5052
CLASSIFIED ADVERTISING RATES Rate based on number of insertions used with in 12 months from date of first insertion and not on the number of inches used. Space in classified advertising cannot be combined for frequency with ROP advertising. Classified advertising accepted in inch multiples only.
Unit 1 inch
1-T 6-T 12-T 24-T 48-T 72-T 117 109 104 95 90 83
(Check Classified Advertising Department for rates if advertisement is larger than 10".) SHIPPING INSTRUCTIONS: Send all material to
Analytical Chemistry Classified Advertising Department 25 Sylvan Rd. South, P.O. Box 231 Westport, CT 06881
Petroleum in the Marine Environment
Advances in Chemistry Series No. 185 Leonidas Petrakis, Editor Gulf Research & Development Fred T. Weiss Editor Shell Development Company A symposium jointly sponsored by the Divisions of Petroleum and Analytical Chemistry of the American Chemical Society.
A carefully balanced presentation of analytical methodology and application that will be of major interest to environmentalists and energy conservationists. In this volume prominent chemists, marine ecologists, microbiologists, and toxicologists bring together for the first time the most important and most pertinent analytical techniques for the complex issues involved in this field. CONTENTS The Biogeochemistry of Fossil Fuel Hydrocarbons · Analytical Chemistry of Petroleum · Oil Spill Identification and Remote Sensing · Determination of Aromatic Hydrocarbons in Zooplankton and Macrofauna • High Resolution Gas Chromatography · Polynuclear Aromatic Hydrocarbons in Environmental Samples · Solubility Behavior of Polycyclic Aromatic Hydrocarbons · Multiple Gas-Phase Equilibration Method · Nonhydrocarbons in the Analysis of Virgin and Biodegraded Petroleum · Application of Trace Analytical Techniques · Analysis of Oily Water • Hydrocarbons in the Sediments of the Bermuda Region · Polycyclic Aromatic Hydrocarbons in Marine/Aquatic Sediments · Ambient-Temperature Extraction of Hydrocarbons from Marine Sediment · Distribution of Aromatic Hydrocarbons in Sediments from Selected Areas · Comparison of Methods for Analysis of Hydrocarbons in Marine Sediments 371 pages (1980) Clothbound $49.95 LC 79-25524 ISBN 0-8412-0475-6 Order from: American Chemical Society Distribution Office — 07 1155 Sixteenth St., N.W. Washington, D.C. 20036 or CALL TOLL FREE 800-424-6747 and use your credit card.
ANALYTICAL CHEMISTRY, VOL. 55, NO. 8, JULY 1983 · 907 A
