| 摘要 |
PROBLEM TO BE SOLVED: To provide a high performance liquid chromatography system having a column filled with porous graphite as a stationary phase between two columns filled with high performance liquid chromatography filler. SOLUTION: By means of this high performance liquid chromatography system, isolation and quantity determination of an oxidizing/reducing substance, which cannot be isolated sufficiently by means of a conventional one, can be carried out excellently with ease.
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