Abstract: To enable appropriate analysis to easily be performed in accordance with an object to be analyzed, provided is an apparatus for determining a chromatograph analysis method includes: an input portion (220) configured to receive input of a sample name of a sample to be analyzed and a component name; a storage (230) configured to store an analysis method for a component corresponding to the component name in the sample corresponding to the sample name so that the analysis method is associated with the sample name and the component name; and a controller (210) configured to search the storage for the analysis method, which corresponds to the sample name and the component name input to the input portion, to read the analysis method from the storage, and present the analysis method to a user.

Abstract: Disclosed herein are an amino acid analysis method and a liquid chromatographic apparatus for improving separation performance of threonine, serine, glycine, and alanine. The method of analyzing amino acids using the liquid chromatographic apparatus equipped with a cation exchange column includes a process for distributing a sample containing threonine, serine, glycine, and alanine as the amino acids, together with an eluent, to the cation exchange column to separate threonine, serine, glycine, and alanine, wherein a column temperature when separating threonine and serine is higher than a column temperature when separating glycine and alanine.

Abstract: A liquid chromatograph includes a liquid feeding portion, a sample injection portion, a separation column, a first temperature adjustment device which raises temperature of the separation column to a first temperature, a detector, a second temperature adjustment device which is provided upstream of the separation column and adjusts temperature of a mobile phase to a second temperature lower than the first temperature, and a control device which controls at least one of the liquid feeding portion and the second temperature adjustment device. The control device controls at least one of the liquid feeding portion and the second temperature adjustment device such that the mobile phase adjusted to the second temperature is fed to the separation column before a next sample is injected after separation of sample components by the separation column ends.

Abstract: In a standard process for determining an unknown sample, fluorescent substances are determined from respective fluorescence characteristics and model coefficients are calculated from spectrum ranges of the fluorescence characteristics of the determined fluorescent substances. An unknown sample is measured after reading of the model coefficients, whereby a target value of the unknown sample is obtained.

Abstract: To enable appropriate analysis to easily be performed in accordance with an object to be analyzed, provided is an apparatus for determining a chromatograph analysis method includes: an input portion (220) configured to receive input of a sample name of a sample to be analyzed and a component name; a storage (230) configured to store an analysis method for a component corresponding to the component name in the sample corresponding to the sample name so that the analysis method is associated with the sample name and the component name; and a controller (210) configured to search the storage for the analysis method, which corresponds to the sample name and the component name input to the input portion, to read the analysis method from the storage, and present the analysis method to a user.

Abstract: In a standard process for determining an unknown sample, fluorescent substances are determined from respective fluorescence characteristics and model coefficients are calculated from spectrum ranges of the fluorescence characteristics of the determined fluorescent substances. An unknown sample is measured after reading of the model coefficients, whereby a target value of the unknown sample is obtained.