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Packed columns nomenclature

A nonpolar mobile phase passing through a packed column that contains a polar stationary phase defines normal-phase HPLC (NP-HPLC). For example, if -hexane comprises the mobile-phase and silica gel is used for the stationary phase, separations of nonpolar organic analytes as shown in Fig. 4.1 is accomplished. With respect to neutral organic compounds, the polar and ionic domains cannot be reached by NP- HPLC. NP-HPLC was the first high-pressure form of liquid chromatography to be developed. If the stationary phase could be made hydrophobic by chemical treatment and the mobile phase made more polar, a reversal of mobile/stationary-phase polarities could be achieved. Like it or not, we are stuck with this nomenclature RP-HPLC has certainly extended the range of analyte polarity that... [Pg.377]

Packed Column Design Nomenclature References Problems... [Pg.10]

The column, including the packing, is the heart of the chromatograph. Columns used for residue detection usually are made out of glass or fused silica. FSOT means fused silica open tubular. Table 20-2 shows current nomenclature for columns based on their inner diameter (i.d.). Figure 20-16, p. 222, shows several columns for GLC. [Pg.221]

See other pages where Packed columns nomenclature is mentioned: [Pg.97]    [Pg.97]    [Pg.97]    [Pg.275]    [Pg.497]    [Pg.507]    [Pg.590]    [Pg.622]    [Pg.3]    [Pg.364]    [Pg.432]    [Pg.248]    [Pg.140]    [Pg.156]   
See also in sourсe #XX -- [ Pg.108 ]



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Packed columns

Packed columns, packing

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