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A Colorimetric Method for Determination of Glycols KENNETH C. LEIBMAN and ELSA ORTIZ, Department of Pharma cology and Therapeutics, University of Florida Medical School, Gainesville, Fia. 3260I Anal. Chem. 40, 251 (1968)
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Anal. Chem. 40, 253 (1968)
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A Chemically Selective Polarographic Detector f o r Gas Chromatography R. P. V A N DUYNE and DAVID A . AIKENS, Department of Chem istry, Rensselaer Polytechnic Institute, Troy, Ν. Υ. Ι 2 Ι 8 Ι Anal. Chem. 40, 254 (1968)
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N I C H O L A S E. VANDERBORGH and W . DALE SPALL, Depart ment of Chemistry, The University of New Mexico, Albuquerque. N. M. 87I06 Anal. Chem. 40, 256 (1968)
Improved Method f o r Preparative Layer Chromatography MARTIN H. STUTZ, W I L L I A M D. LUDEMANN, and SAMUEL SASS, Chemical Research Laboratory, Research Laboratories, Edgewood Arsenal, Edgewood Arsenal, M d . 21010
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Anal. Chem. 40, 258 (1968)
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A Simple Method f o r Determining the Volume of Closed Containers C. A . SEITZ and DAVID E. EMERSON, Helium Research Center, Bureau of Mines, U. S. Department of the Interior, Amarillo, Texas 79106 Anal. Chem. 40, 260 ( 1968)
Peak transmissions up to 6 0 % . Bandwidths as low as 4.0 Angstroms. Up to 100 times more efficient than the best monochromator made today. • Background t o transmission ratio —one part in ten thousand. • Low cost, stable and practically indestructable. CORION specializes in interference filters for the UV-VISnear IR regions of the spectrum. We also make: spectrally flat neutral density filters; hard anti-reflective coatings; durable laser mirrors and exotic metal coatings. GIVE OUR PERSONALIZED SERVICE A TRY
A Microcalorimeter Especially Suited for the Study of Small Quantities of Materials W I L L I A M J . EVANS, EMILE J . McCOURTNEY, and W I L L I A M B. CARNEY, Seed Protein Pioneering Research Laboratory, New Orleans, La.
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