Analysis method, analysis device and non-transitory computer readable recording medium storing program

An analysis system that determines a concentration of a second substance, excluding a concentration of the second substance produced from a first substance, in a sample, comprising:

• an analysis device configured to detect intensity values for the first substance, the second substance, and a reference compound having a known concentration by the analysis device, the reference compound being stable when analyzed, and the second substance being a substance that is produced by decomposition of the first substance;
• at least one processor, wherein the at least one processor is configured to
• calculate a concentration of the first substance based on the intensity value of the first substance obtained by the detection and on a relative response factor in regard to the first substance and the reference compound, the relative response factor having been obtained in advance by an analysis of the first substance at a past concentration and the reference compound at the known concentration;
• and
• determine the concentration of the second substance, excluding the second substance produced from the first substance in the analysis, based on the concentration of the first substance;
• wherein the second substance is an ester of phthalic acid.

A non-transitory computer readable recording medium storing a program for causing a computer to execute a process of determining a concentration of a second substance, excluding a concentration of the second substance produced from a first substance, in a sample, wherein

• the program causes the computer to execute
• calculating a concentration of the first substance based on detected intensities of the first substance, the second substance and a reference compound having a known concentration by an analysis device, and based on a relative response factor in regard to the first substance and the reference compound, the reference compound being stable when analyzed, and the second substance being a substance that is produced by decomposition of the first substance, and the relative response factor having been obtained in advance by an analysis of the first substance at a past concentration and the reference compound at the known concentration;
• and
• determining the concentration of the second substance, excluding the second substance produced from the first substance in the analysis, based on the concentration of the first substance;
• wherein the second substance is an ester of phthalic acid.