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Briefs Aids for Analytical Chemists Wide Mass Range Scanning for the Fast Atom Bombardment Mass Spectrometry of Very Large Compounds 1479 R. J. Cotter*, B. S. Larsen, D. N. Heller, J. E. Campana, and Catherine Fenselau, The Middle Atlantic Mass Spectrometry Facility, The Johns Hopkins University, Baltimore, Md. 21205 Anal. Chem., 57 (1985)
GAGEABILIlH ...one of the elements of Excellence Sufficient fitting pull-up assured with SWAGELOK Gap Inspection Gage. Precision machining and unequaled quality control procedures make gageability a reality. Accumulation of tolerances, among four precision components, is minimized. SWAGELOK Tube Fitting connections are made with a simple turn-and-a-quarter pull-up from finger tight. Assist your installer or inspector, especially in critical systems or in difficult or inaccessible locations, by providing an additional degree of safety and reliability through gageability. SWAGELOK Gap Inspection Gages assure sufficient fitting pull-up. If t h e gage will not fully enter the gap between t h e nut and body shoulder, fitting pull-up is suf-
The need for reliable performance is fully understood and respected by t h e tube fitting specialists w h o design, manufacture, sell a n d service SWAGELOK Tube Fittings.
Determination of Selenium in Copper by Hydride Generation/Atomic Absorption Spectrometry after Electrolytic Removal of Copper 1481 Ragnar Bye, Department of Chemistry, University of Oslo, Box 1033 Blindera, Oslo 3, Norway Anal. Chem., 57 (1985) Semiautomated Method for Determination of Selenium in Geological Materials Using a Flow Injection Analysis Technique 1482 Chris C. Y. Chan, Geoscience Laboratories, Ontario Geological Survey, Ministry of Natural Resources, 77 Grenville Street, Toronto, Ontario, Canada Anal. Chem., 57 (1985) Detection of Amphetamine in Air by Solid Adsorbent Preconcentration and Gas Chromatographic Analysis 1485 A. H. Lawrence* and Lome Elias, Unsteady Aerodynamics Laboratory, National Aeronautical Establishment, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada Anal. Chem., 57 (1985) Preparation of Chelex-100 Resin for Batch Treatment of Sewage and River Water at Ambient pH and Alkalinity 1488 James A. Buckley, Metro Water Quality Laboratory, 410 West Harrison Street, Seattle, Wash. 98119 Anal. Chem., 57 (1985)
Patented
FOUR
ficient. If the gage enters the gap, you'll know pull-up is incomplete. Only SWAGELOK Tube Fittings offer gageability of straight fittings and forged shaped elbows and tees in stainless steel and steel. Gages are available for 1/8" through 1 " sizes.
Swagelok®
PRECISION COMPONENTS Gageability is m a d e possible by manufacturing t h e SWAGELOK body, front ferrule, back ferrule a n d nut t o exacting tolerances. Their precise interaction during makeup produces leak-free connections.
TUBE FITTINGS
...a tradition of Excellence. CRAWFORD FITTING COMPANY 29500 Solon Road, Solon, Ohio 44139 Crawford Fittings (Canada), Ltd., Ontario CIRCLE 33 ON READER SERVICE CARD
752 A · ANALYTICAL CHEMISTRY, VOL. 57, NO. 7, JUNE 1985
Determination of lodine-131 at Low Concentrations in Formaldehyde-Preserved Milk 1490 Kar-Chun To*, Radiation Laboratory, Kansas Department of Health and Environment, Office of Laboratory Services and Research, Topeka, Kan. 66620, and Edward P. Rack, Department of Chemistry, University of Nebraska—Lincoln, Lincoln, Neb. 68588-0304 Anal. Chem., 57 (1985)
