LC USP Methods

Method

Recommendations

L1

Octadecyl silane chemically bonded to porous silica or ceramic microparticles, 3 to 10µm in diameter.

L2

Octadecyl silane chemically bonded to silica gel of a controlled surface porosity that has been bonded to a spherical core, 30 to 50 µm in diameter.

L3

Porous silica microparticles, 5 to 10 µm in diameter.

L4

Silica gel of a controlled surface porosity bonded to a 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

Octyl silane chemically bonded to totally porous microsilica particles, 5 to 10 µm in diameter.

L8

An essentially monomolecular layer of aminopropylsilane chemically bonded to totally porous silica, 10 µm in diameter.

L9

10 µm irregular, totally porous silica gel having a chemically bonded, strongly acidic cation exchange coating.

L10

Nitrile groups chemically bonded to porous silica microparticles, 5 to 10 µm in diameter.

L11

Phenyl groups chemically bonded to porous silica particles, 5 to 10 µm in diameter.

L12

A strong anion-exchange packing - quaternary amine bonded on a solid spherical core, 30 to 50 µm in diameter.

L13

Trimethylsilane chemically bonded to porous silica microparticles, 5 to 10 µm in diameter.

L14

Silica gel, 10µm in diameter, having a chemically bonded, strongly basic quaternary ammonium anion-exchange coating.

L15

Hexyl silane chemically bonded to totally porous silica particles, 3 to 10 µm in diameter.

L16

Dimethylsilane chemically bonded to porous silica particles, 5 to 10 µm in diameter.

L17

Strong cation-exchange resin consisting of sulfonated cross-linked styrene-divinylbenzene copolymer in the hydrogen form, 7 to 11 µm in diameter.

L18

Amino and cyano chemically bonded to porous silica particles, 5 to 10 µm in diameter.

L19

Strong cation-exchange resin consisting of sulfonated cross-linked styrene-divinylbenzene copolymer in the calcium form, about 9 µm in diameter.

L20

Dihydroxypropane chemically bonded to porous silica particles, 5 to 10 µm in diameter.

L21

A rigid, spherical styrene-divinylbenzene copolymer, 5 to 10 µm in diameter.

L22

A cation-exchange resin made of porous polystyrene gel with sulfonic acid groups, about 10 µm in size.

L23

An anion-exchange resin made of porous polymethacrylate or polyacrylate gel with quaternary ammonium groups, about 10 µm in size.

L24

A semi-rigid hydrophobic gel consisting of vinyl polymers with numerous hydroxyl groups on the matrix surface, 32 to 63 µm in diameter.

L25

Packing having the capacity to separate compounds with a molecular weight range from 100 to 5,000 daltons (as determined by polyethylene oxide), applied to neutral, anionic, and cationic water soluble polymers. A polymethacrylate resin base, cross-linked with polyhydroxylated ether (surface contained some residual carboxyl functional groups) was found suitable.

L26

Butyl silane chemically bonded to totally porous silica particles, 5 to 10 µm in diameter.

L27

Porous silica particles, 30 to 50 µm in diameter.

L28

A multifunctional support, which consists of a high purity, 100 angstrom, spherical silica substrate that has been bonded with anionic (amine) functionality in addition to a conventional C8 functionality.

L29

Gamma alumina, reverse phase, low carbon percentage by weight, alumina based polybutadiene spherical particles, 5 µm in diameter with a pore volume of 80 angstrom units.

L30

Ethyl silane chemically bonded to totally porous silica particles, 3 to 10 µm in diameter.

L31

A strong anion-exchange resin - quaternary amine bonded on latex particles attached to a core of 8.5 µm macroporous particles having a pore size of 2000 angstrom units and consisting of ethylvinylbenzene cross-linked with 55% divinylbenzene.

L32

A chiral ligand-exchange packing - L-proline copper complex covalently bonded to irregularly shaped silica particles, 5 to 10 µm in diameter.

L33

Packing having the capacity to separate proteins by molecular size over a range of 4,000 to 400,000 daltons. It is spherical, silica-based, and processed to provide pH stability.

L34

Strong cation-exchange resin consisting of sulfonated cross-linked styrene-divinylbenzene copolymer in the lead form, about 9 µm in diameter.