theoretical plate


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theoretical plate

[‚thē·ə′red·ə·kəl ′plāt]
(chemical engineering)
A distillation column plate or tray that produces perfect distillation (that is, produces the same difference in composition as that existing between a liquid mixture and the vapor in equilibrium with it); the packed-column equivalent of a theoretical plate is the HETP, or height (of packing) equivalent to a theoretical plate.
References in periodicals archive ?
Figure S1: the relationship between theoretical plate numbers (N), peak asymmetry (As), resolution (Rs) and pH/ammonium acetate concentration.
Substituting the [t.sub.1], [t.sub.2] and N terms for [W.sub.avg] in equation 1, the [R.sub.s] equation can then be calculated in terms of time and theoretical plate number as shown in equation 3.
Number of Theoretical Plates, N: Number of theoretical plates; = 16 ([t.sub.R]/[w.sub.b])2
Use of equations for the description of experimental dependence of the height equivalent to a theoretical plate on carrier gas.
For the stationary phase, the conditions were given by the chromatographic column, such as length, diameter, particle diameter, number of theoretical plates, among others.
Chapter <621> states: "Alternatively (as for the application of particle-size adjustments to superficially porous particles), other combinations of L and dp can be used provided the number of theoretical plates (N) is within-25 percent to +50 percent relative to the prescribed column"
Under the chromatographic conditions of this method, the resolution between crotonoylbetaine and L-carnitine was 1.1 [+ or -] 0.9% (Figure 2), the theoretical plates for L-carnitine peak was 2087.0 [+ or -] 0.82%, the tailing factor for L-carnitine peak was 1.3 [+ or -] 1.54%, and total run time was less than 8 min.
Theoretical plates 11510 12141 Resolution 15.64 Tailing factor 1.01 1.20 RSD for peak area [+ or -] 0.25 % [+ or -] 0.22 % LOD 0.002 ppm LOQ 0.006 ppm Correlation 0.9999 coefficient [R.sup.2] Recovery 92.26 %,96.15 % and 101.15 % Stability in 48 h 48 h solution RSD = Relative Standard Deviation

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