Future Articles Theoretical Comparison of Chromatography and Spectrometry as Methods of Measuring Weak Complexation Constants Claude Eon and Georges Guiochon
Critical Evaluation of Correction Methods for Interelement Effects in X-Ray Fluorescence Analysis Applied to Binary Mixtures Cesia Shenberg and Saadia Amiel
Introducing et n e w c h o i c e in spinning band stills
Accurate Determination of Ten Major and Minor Elements in Silicate Rocks Based on Separation by Cation Exchange Chromatography on a Single Column F. W. E. Strelow, C. J. Liebenberg, and A. H. Victor
Streaming Potentials in Automatic Potentiometric Systems Pierre Van den Winkel, John Mertens, and Desire L. Massait
Semiintegral Electroanalysis: Studies on the Neopolarographic Plateau Masashi Goto and Keith B. Oldham
Separation Technique for Mass Spectrometry Fractionated Evaporation from a Direct Inlet System Which Maintains a Fixed Total Ion Current Jochen Franzen, Hendrik Kuper, and Wolfgang Riepe
The Kontes Spinning Band Micro Still—a greatly improved modification of the Piros-Glover spinning band still. We've redesigned and repackaged a still of remarkable accuracy and convenience. And we've manufactured it to be shipped completely assembled and ready for operation ! The operating characteristics of this new Kontes still tell the story: Size of charge: 2 to 70 ml. Pressure range: Atmospheric to less than 1 mm. Hg absolute. Holdup: Using di-butyl phthalate, holdup was found to be between 0.5 and 0.7 ml. at normal boilup rates and a 1 mm. Hg absolute head pressure. Boilup rate: Varies from 20 to 100 ml/hr. Take-off rate: Rate is held below 2 ml/hr. for efficient fractionation. Efficiency to 155+ H.E.T.P. dependent upon boilup rate, rotor speed, and sample characteristics. Pressure drop: at a 40 ml/hr. boilup rate of di-butyl phthalate at 1 mm. Hg at the head, the pressure drop through the column is 1.5 mm. Hg. And, since control is such an important aspect of precise fractionation, we've developed compact, solid-state controlsforan air preheater, column jacket, and pot isolation chamber and pot. The motor speed control—also solid state— is an integral part of the unit, as can be the direct reading pyrometer gage and the thermocouple switching junction. This junction allows monitoring of seven locations throughout the system. For complete technical data, prices and information on accessories, write for Bulletin SBS-10, or contact your Kontes man. - A s manufactured by our affiliate Kontes/Martin under patent U2,608,528.
KONTES Vineland, N.J.
08360
Regional Distributors: KONTES OF ILLINOIS. Evanston, Illinois · KONTES OF CALIFORNIA, San Leandro. Calif.
Direct Determination of Gold, Cobalt, and Lithium in Blood Plasma Using the Mini-Massmann Carbon Rod Atomizer F. J. M. J. Maessen, F. D. Posma, and Johannes Balke
Fundamental Aspects of Flameless Atomic Absorption Using the Mini-Massmann Carbon Rod Atomizer F. J. M. J. Maessen and F. D. Posma
Determination of Traces of Peroxides in Hydrocarbon Process Streams I. J. Thomson and G. C. Bell
Alternating Current Linear Sweep and Stripping Voltammetry with Phase-Selective Second Harmonic Detection H. Blutstein and A. M. Bond
Method for the Choice of Optimal Analytical Positions in Spectrophotometric Analysis of Multicomponent Systems J. Sustek
Determination of Trace and Ultra-Trace Quantities of Rare-Earth Elements by Ion Exchange Chromatography-Mass Spectrography F. W. E. Strelow and P. F. S. Jackson
Theoretical Treatment of the Selectivity and Detection Limit of Silver Compound Membrane Electrodes Werner E. Morf, Gunter Kahr, and Wilhelm Simon
Method for Prediction of Partition Coefficients in Liquid-Liquid Chromatography Paul Menheere, Claude Devillez, Claude Eon, and Georges Guiochon
Automated Atomic Absorption Determination of Arsenic, Antimony, and Selenium in Natural Waters P. D. Goulden and Peter Brooksbank
CIRCLE 147 ON READER SERVICE CARD 844 A · ANALYTICAL CHEMISTRY, VOL. 46, NO. 9. AUGUST 1974
