Extraction Chromatography by T. Braun and G. Ghersini (Eds.)

By T. Braun and G. Ghersini (Eds.)

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In the case of a larger particle size (35 pm), a comparison of theoretical predictions with experimental results has been made in a broad range of flow velocities and for different temperatures by Horwitz and Bloomquist[9]: here too the experimental value of the plate height was found to be about 2 times greater than theoretically predicted. 4-4 ml*cm* nsec-'). This is to be expected since in this region the main contributions to the plate height are those of lateral diffusion in the organic phase, from extraction kinetics, and the transparticle effect.

Figure 5 shows the data obtained; they demonstrate the very close parallelism between the two methods, in spite of the slight difference of the distribution ratios. Thus, if this difference is determined in advance as the paper describes, the elution volume from the column could easily be predicted from the liquid-liquid extraction data. In another work involving a column of Aliquat-336[67], Am and the rare earths all gave straight lines with positive slopes of approximately 2 in the logarithmic relationship between D and the thiocyanate concentration in the eluent, the distribution of the rare earths increasing with the atomic number.

J. HENDERSON, D. E. NELSON, J. Inorg. Nucl. , 31 (1969) 3255. E. CERRAI, C. TESTA, C. TRIULZI, Energia Nucleare, 9 (1962) 377. J. J. KIRKLAND, J. Chromatog. , 7 (1969) 7. CHAPTER 2 CORRELATION BETWEEN EXTRACTION CHROMATOGRAPHY AND LIQUID-LIQUID EXTRACTION I. AKAZA 1. THEORETICAL CORRELATION BETWEEN LIOUID-LIOUID EXTRACTION AND EXTRACTION CHROMA TOGRAPH Y 2. GENERAL CONSIDERATIONS ON THE COMPARISON OF LIOUI D-LIOUID EXTRACTION AND EXTRACTION CHROMATOGRAPHIC RESULTS 3. 1. 2. 1. 2. 3. 4. 5. Synergistic extraction systems 4.

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