文档介绍：美国药典(USP)中规定的色谱柱类型
Chromatographic Reagents
The following list of packings (L), phases (G), and supports (S) is intended to be a convenient reference for the chromatographer. [note—Particle sizes given in this listing are those generally provided. Where other, usually finer, sizes are required, the individual monograph specifies the desired particle size. Within any category of packings or phases listed below, there may be a wide range of columns available. Where it is necessary to define more specifically the chromatographic conditions, the individual monograph so indicates.]
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Packings
L1—Octadecyl silane chemically bonded to porous silica or ceramic micro-particles, to 10 µm in diameter, or a monolithic silica rod.
L2—Octadecyl silane chemically bonded to silica gel of a controlled surface porosity that has been bonded to a solid spherical core, 30 to 50 µm in diameter.
L3—Porous silica particles, 3 USP31 to 10 µm in diameter, or a monolithic silica rod. USP31
L4—Silica gel of controlled surface porosity bonded to a solid spherical core, 30 to 50 µm in diameter.
L5—Alumina of controlled surface porosity bonded to a solid spherical core, 30 to 50 µm in diameter.
L6—Strong cation-exchange packing–sulfonated fluorocarbon polymer coated on a solid spherical core, 30 to 50 µm in diameter.
L7—Octylsilane chemica