Abstract: An information processing device generates a third content by combining a first content and a second content, and generates third identification information indicating identification information of the third content on the basis of first identification information indicating identification information of the first content and second identification information indicating identification information of the second content. The information processing device stores use history information indicating a use history of the third content and the third identification information in a storage unit in association with each other, and updates the use history information depending on the use history of the third content.

Abstract: A fluid passage connector for liquid chromatographs, which comprises a tube having a flat portion at one end, a bushing fixed to the outer periphery of said tube, a joint having therethrough a fluid passage, around the opening portion of which is provided a seal seat surface, and an engaging member for urging the bushing for said tube, which is inserted into said joint, thereby to fluid-tightly engage the flat end portion of said tube with said seal seat surface.

Abstract: A sampling valve for use in high-speed liquid chromatography comprising a first stator having therein a sample injection flow passage and a solution flow passage, a second stator (B; G; J) having therein solution flow passages and a discharge passage, and a rotor having therein three or more sample holding bores of different diameter, said rotor being rotatably interposed between said first and second stators.