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Details for Patent: 5,171,440

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Details for Patent: 5,171,440

Title: Column for liquid chromatography
Abstract:A column for liquid chromatography comprising particles of a calcium phosphate based compound packed in a column, wherein particles of a calcium phosphate based compound which are packed in the portion of said column where a solvent is to be injected have a durability higher than that of particles of a calcium phosphate compound which are packed in the remaining portion of said column.
Inventor(s): Kawamura; Katsumi (Tokyo, JP)
Assignee: Asahi Kogaku Kogyo K.K. (Tokyo, JP)
Filing Date:Jul 24, 1991
Application Number:07/734,114
Claims:1. A column for liquid chromatography comprising particles of a calcium phosphate based compound packed in a column, wherein particles of a calcium phosphate based compound which are packed in a portion of said column where a solvent is to be injected have a durability higher than that of particles of a calcium phosphate based compound which are packed in the remaining portion of said column and wherein said particles of a calcium phosphate based compound having a higher durability form an interfere with said particles of a calcium phosphate based compound in the remaining portion of said column.

2. A column for liquid chromatography as claimed in claim 1, wherein said particles of a calcium phosphate based compound packed in the portion of the column where a solvent is to be injected are particles which have been heat treated at a temperature higher than that of the particles of a calcium phosphate based compound packed in the remaining portion of the column.

3. A column for liquid chromatography as claimed in claim 2, wherein said particles packed in the portion of the column where a solvent is to be injected are particles fired at a temperature of 800.degree. C. or higher.

4. A column for liquid chromatography as claimed in claim 2, wherein said particles packed in the portion of the column where a solvent is to be injected are packed in the portion of the column which extends from the end of the solvent injection side to not more than one half the column length.

5. A column for liquid chromatography as claimed in claim 1, wherein said particles of a calcium phosphate based compound consist of a hydroxyapatite.

6. A column for liquid chromatography as claimed in claim 1, wherein said particles of a calcium phosphate base compound packed in the portion of the column where a solvent is to be injected comprise a fluoroapatite, and said particles of a calcium phosphate based compound packed in the remaining portion of the column comprise a hydroxyapatite.
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