NEWS 11:05 Interferences Affecting the Atomic Fluorescence Flame Spectrometry of Calcium and Magnesium. Donald R. Demers, David W. Ellis, University of New Hampshire, Durham, Ν. Η. 03824 11:25 Measurement of Circular Dichroism Using Polariza tion Modulators. Jack J. Duffield, Ahmad Abu-Shumays, Cary Instruments, 2724 South Peck Rd., Monrovia, Calif. 91016 11:45 Titrations of Aldehydes and Ketones in Nonaqueous Solvents. Richard Ledesma, Charles A. Reynolds, Uni versity of Kansas, Lawrence, Kan. 66044
GENERAL J. M. Dale, Presiding
9:00 Introductory Remarks. J. M. Dale 9:05 A Comparison of Packed, Capillary and Coated Capil lary Columns. Elimelech Grushka, W. D. Cooke, Cornell University, Ithaca, Ν. Υ. 14850 9:25 Standardization of a pD Scale. Maya Paabo, Roger G. Bates, National Bureau of Standards, Washington, D. C. 20234 9:45 Two New Standards for the pH Scale. Bert R. Staples, Roger C. Bates, National Bureau of Standards, Washington, D. C. 20234 10:05 Microstandards for Analytical Chemistry. David H. Freeman, National Bureau of Standards, Washington, D. C. 20234 10:40 A Comparative Spectrophotometric Study of Methods for the Determination of Traces of Boron. H. K. L. Gupta, J. Samuels, D. F. Boltz, Wayne State University, Detroit, Mich. 48202 11:00 Spectrophotometric Determination of Tantalum. Robert E. Daniel, Department of Chemistry, Samford Uni versity, Birmingham, Ala. 35209; James L. Kassner, Sr., 3434 Laclede Ave., St. Louis, Mo. 63103 11:20 Spectrophotometric Determination of Tetrafluoroborate with Ferroin. Vernon S. Archer, University of Wyoming, Laramie, Wyo. 82070; Franklin G. Doolittle, Laramie Petroleum Research Center, Bureau of Mines, Laramie,
VERSATILE DESICCANT DRIERITE is α low-cost, all-purpose anhydrous calcium sulfate used in desiccators, U-tubes, drying columns, drying tubes and large drying cabinets to dry air and gases. DRIERITE is also ideal for drying organic liquids in either the liquid or vapor phase. The moisture remaining in a gas after drying with DRIERITE amounts to only 0 . 0 0 5 mg per liter.
9:00 Introductory Remarks. R. S. Porter 9:05 Isothermal Crystallization Behavior of Polypropylene from Differential Scanning Calorimetry. J. R. Knox, Avisun Corp., Post Rd., Marcus Hook, Pa. 19061 9:30 Analysis of Polystyrene Samples in the Liquid Phase by Differential Scanning Calorimetry. James A. Currie, Malcolm Dole, Materials Research Center, Northwestern University, Evanston, III. 60201 9:55 Transition Studies of Poly(2, 6-Dimethyl 1-4, Phenylene Ether). F. E. Karasz, Goessmann Laboratory, Uni versity of Massachusetts, Amherst, Mass.; J. M. O'Reilly, Xerox Research Laboratory, Webster, Ν. Υ.; Η. Ε. Bair, Bell Telephone Labs, Murray Hill; N. J.; R. A. Kluge, General Electric Research & Development Center, Sche nectady, Ν. Υ. 10:20 Melting Point Relationships for Poly(ethylene Terephthalate) Systems. P. E. Slade, Monsanto Co., Technical Center, Pensacola, Fia.; T. A. Orofino, Chemstrand Re search Center, Inc., Inc., Durham, N. C. 27702 10:45 Thermal Analyses of Polymers. I. Aromatic Poly esters. G. W. Miller, Mobay Chemical Co., Penn Lincoln Pkwy. West, Pittsburgh, Pa. 15205 11:10 Calorimetric Studies of Drawn Polyethylene Terephthalate. J. L. Koenig, M. D. Mele, Division of Polymer Science, Case Western Reserve University, Cleveland, Ohio 44106 11:35 Crystallization of Poly(ethylene Terephthalate). David M. Cates, Ernest L. Lawton, Jr., North Carolina State University, Raleigh N. C. 27607
PERMANENT VISCOSITY STANDARDS Now available! A complete range of viscosity standards. These fluids are provided in containers of nominal one pint capacity. All available standards are silicone fluids and are permanently stable Standard Viscosity in and Newtonian. Packaged with Fluid Centipoises L-l . 10 each standard is a calibration 100 L-2 . report for viscosity at 25°C. GuarL-3 . . 1,000 anteed accuracy is ± 1 % . Select R-l . . 12,500 the one or more that best suit R-2 . . 30,000 your equipment or requirements H-l . . 60,000 from the chart shown at right. H-2 . . 100,000
REGULAR DRIERITE is constant in volume, inert except toward water, insoluble in organic liquids and refrigerants, non-disintegrating, non-wetting, non-poisonous, non-corrosive, re peatedly regenerative, and non-channeling. INDICATING DRIERITE has all of the properties of Regular DRIERITE, but is impregnated with C.P. cobalt chloride a n d , hence, makes a clearly visible change from blue when dry to pink when exhausted. SOLIDSLIQUIDSGASES SOLIDS LIQUIDS GASES SOLIDS
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Section C SYMPOSIUM ON ANALYTICAL CALORIMETRY
R. S. Porter, Presiding
Section Β
W. A. HAMMOND DRIERITE CO.
Wyo. 82070; LaVerne M. Young, Eastern Wyoming Col lege, Torrington, Wy. 82240 11:40 Spectrophotometric Determination of Tartaric Acid with /3-Naphthol. Gary D. Christian, Department of Chem istry, University of Kentucky, Lexington, Kentucky 40506
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VOL. 40, NO. 3, MARCH 1968
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