theoretical plate การใช้

• Those steps represent the theoretical plates ( or equilibrium stages ).
• The theoretical plate concept was also adapted for Synge.
• More theoretical plates lead to better separations.
• The required number of theoretical plates is 6 for the binary distillation depicted in Figure 1.
• The concept of theoretical plates in designing distillation processes has been discussed in many reference texts.
• The number of height equivalent to a theoretical plate ( HETP ) will be greater than expected.
• The " height equivalent to a theoretical plate " ( HETP ) will be greater than expected.
• However, the theoretical plate in packed beds, chromatography and other applications is defined as having a height.
• The IUPAC's Gold Book provides a definition of the number of theoretical plates in a chromatography column.
• Conversely, for a given desired separation, the more reflux is provided, the fewer theoretical plates are required.
• In isocratic elution, peak width increases with retention time linearly according to the equation for N, the number of theoretical plates.
• The variance per unit length of the column is taken as the ratio of the column length to the column efficiency in theoretical plates.
• Each vaporization-condensation cycle ( called a " theoretical plate " ) will yield a purer solution of the more volatile component.
• Corrections can also be made to take into account the incomplete efficiency of each tray in a distillation column when compared to a theoretical plate.
• Since an actual, physical plate is rarely a 100 % efficient equilibrium stage, the number of actual plates is more than the required theoretical plates.
• The more reflux provided for a given number of theoretical plates, the better is the column's separation of lower boiling materials from higher boiling materials.
• Where N is the number of theoretical plates, \ mu is the apparent mobility in the separation medium and D _ m is the diffusion coefficient of the analyte.
• However, when modeling packed columns it is useful to compute a number of theoretical plates to denote the separation efficiency of the packed column with respect to more traditional trays.
• A spinning band distillation system uses a spinning band of Teflon or metal to force the rising vapors into close contact with the descending condensate, increasing the number of theoretical plates.
• If each physical tray or plate were 100 % efficient, then the number of physical trays needed for a given separation would equal the number of equilibrium stages or theoretical plates.