Search results with tag "Number of theoretical plates"
Chromatography Band-Broadening (rate theory)
cao.chem.ufl.eduB. Theoretical measures of band-broadening: 1. In chromatographic theory, the width of a peak is usually described in terms of H, the high equivalent of a theoretical plate, H = L/n L = colume length N= number of theoretical plates = (tR/σ)2 tR= retention time of the solute σ=standard deviation of the peak (in time units)
Separation Ch. 23 Fundamentals of Analytical Separations ...
www.calstatela.eduNumber of Theoretical Plates • Example: A solute with a retention time of 407 s has a base width of 13 s on a 12.2 m column. Find the plate height and number of plates. 4 2 2 2 2 1.57 10 13 16 (16)(407) = = = × w t N r 0.78 mm 1.57 10 12.2 m 4 = × = = N L H Factors Affecting Resolution Increase resolution: – Increase column length (Square ...
Gas Chromatography: Principles and Determination of ...
chemlab.truman.eduThe number of theoretical plates (n) of a column with respect to a particular compound can be found using the following equation: N = 16(tr/w) 2 = 5.55(t r/w1/2) 2 where w is the peak width measured in the same units as tr and w1/2 is the peak width measured at half of the peak height..
GC Column Selection Guide - Sigma-Aldrich
www.sigmaaldrich.com(number of theoretical plates) and sample capacity (amount of any one sample component that can be applied to the column without causing the desired sharp peak to overload). Optimizing one of these factors requires a sacrifice from the other. The ideal I.D. for a given application is dependent on the analytical needs.
Number of Theoretical Plates (N)
www.agilent.comshorter each theoretical plate, the more plates are "contained" in any length of column. This, of course, translates to more plates per meter and higher column efficiency. Utilization of Theoretical Efficiency (UTE%) Coating Efficiency (CE%) is a historical term that compares the measured column efficiency and its theoretical maximum efficiency.
Number of Theoretical Plates (N)
lcgcindia.comNumber of Theoretical Plates (N), Height Equivalent to a Theoretical Plate (H), Utilization of Theoretical Efficiency (UTE%), Resolution (RS), Phase Ratio (β),