The Complete Chromatography and Mass Spectrometry Products Catalog Scientific Glass Engineering's new 1981 product catalog is now available and free for the asking. This new catalog includes the complete line of SGE products for chromatography and mass spectrometry. • capillary columns • splitters • graphite ferrules • valves • carrier gas • jet separators purifiers • syringes • GLT
analysis of the organic constituents of environmental particles collected by the dichotomous filter (18,19). This is an especially difficult task because the total amount of solid sample available from these small sample elements is in the subnanogram range. The largest problem yet unsolved is reduction of high levels of impurities introduced by a viton O-ring gasket. There is much room for improve ment in existing procedures. Design of the glassware used for rotary evapora tion and Kuderna-Danish concentra tion can be further improved to reduce the inside surface area. Extraction procedures can often be modified to reduce extraction times and the vol ume of solvent used. Surface adsorp tion of organics might be reduced by developing truly deactivated glass sur faces. In any given procedure, the ana lyst must strive for reproducibility, since variability in results is still pri marily affected by skill in the basic techniques of sample rinsing, transfer, and consistency during every step of a preconcentration procedure.
References (1) Dunges, W. "Prechromatographic Micromethods"; Dr. Alfred Huthig Publish ers: New York, in press. (2) Hertz, H. S.; May, W. E.; Wise, S. Α.; Chesler, S. N. Anal. Chem. 1978,50, 428 A. (3) Kolb, B., Ed. "Applied Headspace Gas Chromatography"; Heyden & Son Ltd.: London, 1980. (4) Clement, R. E.; Cook, R. M.; Karasek, F. W. Paper presented at 1981 Pitts burgh Conference on Analytical Chemis try and Applied Spectroscopy, Atlantic City, N.J., March 9,1981; Abstract No. 137.
(5) Hill, H. H., Jr.; Chan, Κ. W.; Karasek, F. W. J. Chromatogr. 1977,131, 245. (6) Harless, R. L.; Oswald, Ε. Ο.; Wilkin son, Μ. Κ.; Dupuy, Α. Β., Jr.; McDaniel, D. D.; Tai, H., Anal. Chem. 1980,52, 1239 (7) Webb, R. G. "Isolating Organic Water Pollutants: XAD Resins, Urethane Foams, Solvent Extraction"; EPA Re port EPA-660/4-75-003, June, 1975 ρ 15. (8) Bowers, W. D.; Parsons, M. C ; Cle ment, R. E.; Karasek, F. W. J. Chroma togr. 1981,207,203. (9) Bowers, W. D.; Parsons, M. L.; Cle ment, R. E.; Eiceman, G. Α.; Karasek, F. W. J. Chromatogr. 1981,206, 279. (10) Denney, D. W.; Karasek, F. W.; Bow ers, W. D. J. Chromatogr. 1978,151,75. (11) Keith, L. H., Ed. "Identification and Analysis of Organic Pollutants in Water"; Ann Arbor Science: Ann Arbor, Mich., 1976. (12) Junk, G. Α.; Richard, J. J.; Grieser, M. D.; Witiak, D.; Witiak, J. L.; Arguello, M. D.; Vick, R.; Svec, H. J.; Fritz, J. S.; Calder, G. V. J. Chromatogr. 1974,99,745. (13) Bean, R. M.; Riley, R. G.; Ryan, P. W. In "Water Chlorination Environmental Impact and Health Effects"; Jolley, R. L.; Gorchev, H.; Hamilton, D. H., Jr., Eds.; Ann Arbor Science, Mich., 1978; Vol. 2, ρ 223. (14) Chang, R. C; Fritz, J. S. Talanta 1978,25,659. (15) Otson, R.; Williams, D. T.; Bothwell, P. D. Environ. Sci. Technol. 1979,13, 936. (16) Bellar, Τ. Α.; Lichenberg, J. J. J. Am. Water Works Assoc. 1974,66, 739. (17) Grob, K.; Grob, K., Jr.; Grob, G. J. Chromatogr. 1975,106, 299. (18) Karasek, F. W.; Parsons, M. L. "De velopment of Microextraction Proce dures To Analyze Total Carbon and Or ganic Compounds from Dichotomous Filters"; EPA Grant #R807-028-01, Re search Triangle Park, N.C., May 1980. (19) Bowers, W. D. "Ultratrace Organic Analysis of Dichotomous Filters Using GC and GC/MS Techniques"; PhD The sis, Arizona State University, May 1981.
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Raymond Clement (left) and Janet Sweetman are seen with Francis Karasek in his laboratory at the Univer sity of Waterloo, where they work to gether on analytical methods devel opment for trace organic constituents of environmental samples. Clement, a Natural Sciences and Engineering Research Council (Canada) postdoc toral fellow, received his doctorate at the University of Waterloo; Sweet-
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1058 A · ANALYTICAL CHEMISTRY, VOL. 53, NO. 9. AUGUST 1981
man's doctorate was earned at the University of Michigan. Current new interests include development of computer software to enhance the se lectivity of GC/MS techniques, anal ysis of atmospheric aerosols for parti cle size distribution, determination of organic constituents with piezoelec tric crystal cascade impact instru mentation, and fundamental studies of ion mobility spectrometry.
