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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
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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
