摘要:
A packing material for liquid chromatography, comprising a spherical clay mineral powder which comprises a naturally occurring or synthetic water-swellable clay mineral, a clay mineral having foreign cations substantially substituted for interlayer ions inherently present in the naturally occurring or synthetic water-swellable clay mineral, or a calcined product thereof.
摘要:
A liquid chromatograph includes pumps for supplying solvents, a mixer for mixing the solvents, a controller for controlling a mixing ratio of the solvents in the mixer, a chromatograph column for separating a sample carried with the solvents, a flow path control valve for supplying the sample together with the solvents to the chromatograph column, and a detector for detecting the sample supplied thereto, wherein the mixer includes a mixing chamber and a porous medium accommodated in the mixing chamber, the porous medium having a size and shape in conformity with a size and shape of said mixing chamber such that no substantial gap is formed between an outer surface of the porous medium and an inner surface of the mixing chamber.
摘要:
A liquid chromatograph and a column packing material effectively condensing cationic specimen and exhibiting a high resolution. The liquid chromatograph includes a pre-focusing column (30, 40) having a volume of less than 2.0 milliliters and packed with a column packing material, in which a porous support is coated by a silicone polymer having a Si—R—X (R is a spacer part, X is a sulfonic group) bond and a Si—R′ (R′ is a hydrophilic group) bond, wherein the specimen to be analyzed is supplied to the pre-focusing column in the state dispersed in a solvent for condensation. The condensed specimen is then separated in a separation column (16, 43) used for separating the specimen dispersed in the solvent, and the separated specimen is analyzed by a detector (17, 41).
摘要:
A packing material for liquid chromatography bears a polyalkylene polyamine moiety linked through a spacer moiety as the pendant group to a porous silica gel coated with a silicone polymer, and optionally is crosslinked by a crosslinking agent on two or more amino group of the different polyalkylene polyamine moieties, and a process for production thereof. Such a packing material is especially useful in the analysis of sugars.
摘要:
Disclosed herein are a cation-exchanged clay mineral comprising a swelling clay mineral with the cations between layers substantially replaced by low-valence metal amine complexes and/or low-valence metal ammine complexes, and a packing material for chromatography using the same. Use of the packing material provides a sharp peak with respect to a highly unsaturated compound. Since the packing material is unlikely to be influenced by a solvent, it is usable for a long time with good stability.
摘要:
A liquid chromatograph includes pumps for supplying solvents, a mixer for mixing the solvents, a controller for controlling a mixing ratio of the solvents in the mixer, a chromatograph column for separating a sample carried with the solvents, a flow path control valve for supplying the sample together with the solvents to the chromatograph column, and a detector for detecting the sample supplied thereto, wherein the mixer includes a mixing chamber and a porous medium accommodated in the mixing chamber, the porous medium having a size and shape in conformity with a size and shape of said mixing chamber such that no substantial gap is formed between an outer surface of the porous medium and an inner surface of the mixing chamber.
摘要:
A modified powder or particulate material having a silicone polymer film coated on substantially the entire surface thereof, this powder or particulate material being produced by bringing at least one silicone compound, in the form of a vapor, having the general formula (I):(R.sup.1 HSiO).sub.a (R.sup.2 R.sup.3 SiO).sub.b (R.sup.4 R.sup.5 R.sup.6 SiO.sub.1/2).sub.c (I)Wherein R.sup.1, R.sup.2, and R.sup.3 represent, independently, hydrogen or a hydrocarbon residue having 1 to 10 carbon atoms, which may be substituted with at least one halogen atom, provided that R.sup.1, R.sup.2, and R.sup.3 are not hydrogen at the same time, R.sup.4, R.sup.5, and R.sup.6 represent independently, hydrogen or a hydrocarbon residue having 1 to 10 carbon atoms, which may be substituted with at least one halogen atom, a is zero or an integer of 1 or more, b is zero or an integer of 1 or more, and c is zero or 2, p rovided that c is 2 when a and b are simultaneously zero and a+b is an integer of 3 or more when c is zero, into contact with a powder or particulate material having an active site on the surface thereof, whereby the silicone compound is polymerized on substantially the entire surface of the powder or particulate material.
摘要:
There are disclosed a polymer packing material suitable for liquid chromatography and a producing method thereof. The polymer packing material having a polymer particle based on a styrene skeleton with monodispersed particle distribution can be obtained by hydrophilic treatment of an inner surface of a micropore existing in a fine pore of the polymer packing material, or subsequent introduction of a hydrophobic group into the inner hydrophilic surface by chemical modification. A method of producing the polymer packing material suitable for liquid chromatography includes the step of polymerizing glycerol dimethacrylate as a crosslinking agent and 2-ethylhexl methacrylate as a monomer according to a two-step swelling polymerization process. Alternatively, the producing method includes the step of crosslinking and polymerizing only glycerol dimethacrylate to form a polymer, and introducing the hydrophobic group into the polymer by chemical modification.
摘要:
A packing material for a column comprises a porous support coated with silicone polymer having an Si--R bond, wherein R is a hydrophobic group and an Si--R' bond, wherein R' is a hydrophilic group, and a process for the production thereof.