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Comparison of Photoacoustic Spectroscopy, Conventional Absorption Spectroscopy, and Potentiometry as Probes of Lanthanide Speciation 298
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Photoacoustic spectroscopy provides the same information about the number and strength of metal-ligand complexes as conventional absorption spectroscopy or potentiometry at metal concentrations where the latter techniques are insensitive. Richard A. Torres*, Cynthia E. A. Palmer, Patricia A. Baisden, Richard E. Russo, and Robert J. Silva, Lawrence Livermore National Laboratory, P.O. Box 808, L-234, Livermore, CA 94551
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Kinetics of the Reaction between Aromatic Aldehydes and p-Dianisidine
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304
Kinetic studies of the Schiff base formation reaction between aromatic aldehydes and o-dianisidine provide evidence of a three-path mechanism. Two paths are catalyzed by acetic acid and the other by stannic chloride. Analytical implications of the kinetic studies are discussed. Mayda Lopez-Nieves, Peter D. Wentzell, and S. R. Crouch*, Department of Chemistry, Michigan State University, East Lansing, MI 48824
Correspondence Comparison of Diffuse Reflectance and Diffuse Transmittance Spectrometry for infrared Microsampling 308 David J. J. Fraser, Kelly L. Norton, and Peter R. Griffiths, Department of Chemistry, University of California, Riverside, CA 92521-0403 Differentiation of Leucine and Isoleucine Residues in Peptides by Consecutive Reaction Mass Spectrometry 311 Takemichi Nakamura*, Hidemi Nagaki, Yasuko Ohki, and Takeshi Kinoshita, Analytical and Metabolic Research Laboratories, Sankyo Co., Ltd., 2-58, Hiromachi 1-Chome, Shinagawa-ku, Tokyo 140, Japan Continuous On-Line Monitoring of Biomolecules Based on Automated Homogeneous Enzyme-Linked Competitive Binding Assays 314 Sylvia Daunert and Leonidas G. Bâchas*, Department of Chemistry, University of Kentucky, Lexington, KY 40506-0055 and Genevieve S. Ashcom and Mark E. Meyerhoff, Department of Chemistry, The University of Michigan, Ann Arbor, MI 48109-1055
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Polishable and Robust Biological Electrode Surfaces 318 Joseph Wang* and Kurian Varughese, Department of Chemistry, New Mexico State University, Las Cruces, NM 88003
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ANALYTICAL CHEMISTRY, VOL. 62, NO. 3, FEBRUARY 1, 1990
