Linear velocity of mobile phase

FIGURE 7.4 (a) Plots of column back pressure against linear velocity of mobile phase (29,... [Pg.156]

Plate height of the column as a function of the linear velocity of mobile phase The flow rate should have an optimum where the plate height is at a minimum... [Pg.100]

Figure 6.6 Plot of plate height [H) versus linear velocity of mobile phase (0), showing contributions from the four terms detailed above.

Linear velocity of mobile phase Optimum linear velocity of mobile phase Practical linear velocity of mobile phase Reduced velocity of the mobile phase Specific retention volume... [Pg.547]

Linear velocity of mobile phase interstitial velocity of mobile phase Rohrschneider constant for nitromethane Mean interstitial velocity of mobile phase i.e., average linear gas velocity... [Pg.1003]

Fortunately the back pressure (resistance to flow presented by the packed column) is inversely proportional to the square of the column diameter. Hence, by increasing the column diameter from 4.6 to 150 mm, a pressure reduction factor of over one thousand times would be expected. However, in order to maintain a proportional linear velocity of mobile phase through the larger column, the back pressure will remain... [Pg.168]

The mixture of acetonitrile/water (1 1, v/v) was selected as most effective mobile phase. The optimum conditions for chromatography were the velocity of mobile phase utilization - 0,6 ml/min, the wave length in spectrophotometric detector - 254 nm. The linear dependence of the height of peack in chromathography from the TM concentration was observed in the range of 1-12.0 p.g/mL. [Pg.215]

V — reduced mobile phase linear velocity, u—mobile phase average linear velocity and Di2 — binary diffusivity.) A very important point is that the reduced plate height is a function of only the reduced... [Pg.136]

Linear velocity u, velocity of mobile phase through the column,... [Pg.534]

Velocity of Mobile Phase u. Synonymous with linear velocity. [Pg.21]

The first moments of the enantiomers to be separated can be plotted against the inverse interstitial velocity of mobile phase and linear equilibrium constants can be readily determined from the slopes of the lines. [Pg.266]

The average linear velocity u of the mobile phase in terms of the column length L and the average linear velocity of eluent (which is measured by the transit time of a nonretained solute) is... [Pg.1104]

Assumed reduced parameters h -linear velocity of the mobile phase. [Pg.1108]

It is seen that the value of (H) is completely dependent on the diffusivity of the solute in the mobile phase, the column radius and the linear velocity of the mobile phase. The simple uncoated open tube can clearly be used to determine the diffusivity of any solute in any given solvent (the mobile phase). This technique for measuring diffusivities will be discussed in a later chapter. [Pg.267]

Po) is the pressure at the column exit, and (uq) is the linear velocity of the mobile phase at the column exit. [Pg.268]

For an understanding of band broadening in chromatographic systems, the linear velocity of the mobile phase is more important than the column volumetric flow rate. The mobile phase velocity and flow rate in an open tubular column are simply related by... [Pg.528]

Assumed reduced parameters h = 3, v = 4.5. These are optimum values fromagraphofreducedplateheightversus reduced linear velocity of the mobile phase. [Pg.1377]

In Eq. (7), X is an auxiliary parameter, u is the linear velocity of the mobile phase, Cc is critical concentration of the displacing salt, Z is the effective charge on the solute ion divided by the charge on the mobile phase ion and B is the gradient steepness. [Pg.63]