Manufacturers' Literature Chromatography Columns. Brochure includes descriptions of packings and columns, Graphpac-GC, custom-coated packings, custom-packed metal col umns, glass-lined stainless steel GC columns, and glass columns. 12 pp. Alltech Associates 435 Direct-Drive Vacuum Pump. Brochure features pump description, dimensions, specifications, pumping-speed curves, and application information. Accesso ries and ordering information are also included. 12 pp. Sargent-Welch 436 Supelco Reporter. Vol. 1, No. 5 in cludes articles on GC, HPLC, and chem ical standards. It also details how to get rapid, selective LC analysis of underivatized sugars and reproducible hydrocar bon analysis. 11 pp. Supelco, Inc. 437
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Isolines. Fall 1982 issue is devoted to hemoglobin variants. A guest article on screening newborns for hemoglobino pathies and update information on pro cedures used in identifying and quantitating such variants as Hb Α ι , Hb F, Hb A 2 , and Hb Bart's are included. 8 pp. Isolab 438 Excimer Laser. Brochure covers the definition of excimer lasers, their per formance, and advantages. Specifically the 400/401 and the 800/801 series are described in detail with complete specs on both. 8 pp. Tachisto 439 FTIR. Brochure describes the IR/80 Se ries Spectrometers. It features the IR7 85, which handles research and analyti cal problems such as opaque samples, aqueous solutions or low concentra tions. It can be equipped for high-reso lution capillary GC/IR applications. 18 pp. IBM 440 Flavor Characterization. Application highlight illustrates simplified analysis
of flavoring constituents by HPLC. It also explains how Waters HPLC instru mentation provides extensive capabili ties for analyzing nonvolatile com pounds; analyzing complex flavoring mixtures in minutes; and for optimizing resolution of both constituents during analysis for use in subsequent taste panel evaluations. 6 pp. Waters 441 The Wescan Ion Analyzer. Fall 1982 issue features articles on ultratrace analysis of chloride and sulfate by sin gle-column ion chromatography, analy sis of corrosive solutions, and analysis of anions in seawater. 7 pp. Wescan In struments 442 Capillary Columns Wall Chart. Guide aids in capillary column selection by listing the various types of commercial ly available columns by physical char acteristics and operational parameters. It includes tables that list characteris tics of various injection methods and ta bles of equations used for column eval uation. Foxboro Analytical 443
Mettler density measurement: Easy and affordable. Mettler now offers a portable, hand-held density instrument for just $1355. The Mettler/Paar DMA35 density meter goes wherever you go. Battery powered. Simple to use—sample is introduced by the attached hand pump. Digita readout indicates density Of sample at actual sample temperature. Other models available reading in specific gravity or Brix. The Mettler/ Paar line also includes higher precision lab models and process control models. For further information, contact Mettler, Box 71, Hightstown, NJ 08520,(609)448-3000.
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ANALYTICAL CHEMISTRY, VOL. 54, NO. 14, DECEMBER 1982 · 1503 A
