FUTURE ARTICLES Submolecular Group Analysis of High Resolution Mass Spectra of Peptides and Other Sequence Molecules A. Kunderd, R. B. Spencer, and W. L. Budde Determination of Blood in Dried Formalin-Fixed Lung Tissue. Spectrophotometric Method Involving Pyrrole Residues of the Porphyrin Ring /. Bergman and R. Lox/ey Estimation of Chromatographic Peak with Particular Con sideration of the Effects of Base-Line Noise P. C. Kelly and W. E. H a r r i s
Direct Potentiometric Measurement of Hydrogen Ion Con centrations in Sodium Chloride Solutions G. N. Hedwig and H. K. J. Powell Characterization and Analysis of Waxes by Gel Permeation Chromatography D. E. Hillman Determination of Uranium(IV), Uranium (VI), and Total Uranium in Phosphoric Acid Process Solutions by Tri-nOctylamine Extraction and Polarography /. Hodara and I. Balouka Electrochemical Reduction of «,,β-Unsaturated Ketones J. P. Zimmer, J. A. Richards, J. C. Turner, and D. H. Evans Utilization of the Matrix as a Standard in Trace Analysis by Neutron Activation Analysis. Analysis of Cadmium-Doped Sodium Chloride Crystals M. Heurtebise and J. A. Lubkowitz
Identification of New Steranes, Terpanes, and Branched Paraffins in Green River Shale by Combined Capillary Gas Chromatography and Mass Spectrometry E. J. Gaf/egos
Mercury-Platinum Optically Transparent Electrode W. R. Heineman and T. Kuwana Conducting Glass Electrode in a Thin-Layer Electrochemi cal Cell with Application to the Analysis of Neptunium R. C. P r o p s t
Automation of Nitrogen Analysis of Grain and Grain Prod ucts D. E. Uni, E. B. Lancaster, and C. Vo/nov/ch Spectroelectrochemistry: Application of Optically Trans parent Minigrid Electrodes under Semi-Infinite Diffusion Conditions M. Petek, T. E. Neal, and R. W. Murray Potentiometric Study of Base Strengths in the Binary Sol vent, Acetic Acid-Chloroform O. W. Kolling and K. I. Laws X-Ray Photoelectron Spectroscopy of Quaternary Phosphonium Compounds W. E. Schwartz and D. M. Hercules Laser Pyrolysis Gas Chromatography: mers
Application t o Poly
0 . F. Folmer, Jr.
Instrumental-Computer System for Analysis of Multicomponent Organic Mixtures /. Lysyj, P. R. N e w t o n , a n d W. J . Taylor
Use of the Nitrous Oxide-Acetylene Flame for Determina tion of Arsenic and Selenium by Atomic Absorption Spec trometry G. W. Kirkbright and L. Ransom
L901 LIQUID PHASE CHROMATOGRAPH High-pressure operation (4500 psig) Carrier liquid flow controller Low dead volume elements Interchangeable columns Choice of detectors : Ultra-Violet, Conductivity, etc. Possibility of introducing an elution gradient Automatic temperature control to within 0.5 °C.
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104 A • ANALYTICAL CHEMISTRY, VOL. 43, NO. 7, JUNE 1971
