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By Raymond P.W. Scott

Written by way of a pro chromatographer with extra that forty years, event within the box, this reference comprehensively covers the layout, building, and operation of gasoline chromatography (GC), liquid chromatography (LC), and thin-layer chromatography (TLC) detectors--all in a single handy, up to date resource.

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S. Ettre, Chromatographia, 14(1981)257. 5. E. Katz and R. P. W. Scott, J. , 253(1982)159. 6. D. H. Desty, "Gas Chromatography, 1958" (ed. D. H. Desty) Butterworths, London (1958)126. 7. R. P. W. Scott and P. Kucera, J. , 169(1979)51. 8. R. P. W. Scott and J. G. Lawrence, Anal. , 39(1967)830. 9. A. Klinkenberg, "Gas Chromatography 1960" (Ed. W. Scott), Butterworths, London,(1960)194. 10. R. P. W. Scott, "Liquid Chromatography Column Theory", John Wiley and Sons, New York, (1992) 26. 11. R. P. W.

Html 02/06/2004 Document Página 1 de 1 Page 39 The Concentration Sensitivity of a Chromatographic System The concentration sensitivity of a chromatographic system (Xc) is defined as that which will provide a peak with a height equivalent to twice the noise level and can be obtained directly from the system mass sensitivity. If the minimum detectable mass is dissolved in the maximum permissible sample volume [9] (that sample volume that will limit the increase in sample variance to 10% of the column variance), then this solute concentration will constitute the minimum detectable sample concentration.

6dp, where (dp) is the particle diameter of the packing. 65, substituting for (n) in equation (14), Equations (13) and (15) allow the permissible extracolumn dispersion to be calculated for a range of capillary columns and packed columns. The results are shown in table 4. The standard deviation of the extracolumn dispersion is given as opposed to the variance, because it is easier to visualize from a practical point of view. 607 of the height of the peak that would have been caused by extracolumn dispersion alone.

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