There are 224 reasons why.... - American Chemical Society

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IMITATING Infrared Emission from a Flame as the Basis for Chromatographic Detection of Organic Compounds

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IR emission by carbon dioxide at 4.3 μπι (2326 cm" ), pro­ duced when organic compounds are introduced into a hydro­ gen-air flame, can be used as the basis for detection in both LC and GC. M. Keith Hudson and Kenneth W. Busch*, Department of Chem­ istry, Baylor University, Waco, Tex. 76798 Anal. Chem., 59 (1987) BUT D O N ' T S E T T L E FOR AN I M I T A T I O N

Data Processing Techniques to Extract Pure-Component Spectra from Mixture Spectra and Their Application to Polymeric Systems

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Novel Fragmentation Process of Peptides by Collision-Induced Decomposition in a Tandem Mass Spectrometer: Differentiation of Leucine and Isoleucine 2621

There are 224 reasons why.....

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The fragmentation process involves both the cleavage of a —Ν—CR— peptide bond and of the /3,7-bond in the side chain R. Formation of this ion and its mass depends on the nature of the substituent at the /3-carbon atom of the amino acid involved in the peptide bond cleavage. Richard S. Johnson, Stephen A. Martin, and Klaus Biemann*, Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Mass. 02139, and John T. Stults and J. Throck Wat­ son, Department of Biochemistry, Michigan State University, East Lansing, Mich. 48824 Anal. Chem., 59 (1987)

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Kinetic Study of Speciation of Nickel(ll) Bound to a Fulvic Acid 2616 Species present in solutions of Ni (II) equilibrated with soil fulvic acid are studied by a kinetic method based on initial parameterization using a Laplace transform and final fitting by nonlinear regression. J. Allen La vigne, Cooper H. Langford*, and Mark K. S. Mak, Chemistry Department, Concordia University, Montreal, Quebec H3G 1M8, Canada Anal. Chem., 59 (1987)

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A nonlinear optimization technique is developed to extract pure-component spectra from the mixture spectra. Three different conformational "pure" spectra of poly(ethylene terephthalate) are obtained. Juwhan Liu and Jack L. Koenig*, Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106 Anal. Chem., 59 (1987)

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1228 A · ANALYTICAL CHEMISTRY, VOL. 59, NO. 21, NOVEMBER 1, 1987