Mass analysis data processing device for qualitative analysis

摘要

The degree of similarity of the peak pattern between the mass spectrum obtained for the unknown target substance in the sample and the known mass spectrum of the specific substance is calculated (S4), and the similarity is in the range of 80 to 60% (No in S6 ), The ratio of the signal intensities at the two m / z characterizing the specific substance is calculated and compared with the reference value (S 7, S 8). If the intensity ratio exceeds the reference value, there is a high possibility that the target substance is a specific substance. Therefore, as in the case where the similarity is 80% or more, it is judged that the specific substance is contained in the sample (S10). Also, prior to such a determination, from the graph of the total ion current signal generated based on the data collected by performing the measurement from the point before the sample is placed at the measurement position, it is determined whether or not the sample has been reliably subjected to mass spectrometry (S2, S3). When there is no significant peak in the graph, it is judged that a sample introduction error is present (S11). In this way, the qualitative accuracy can be improved more than the conventional qualitative analysis using only the similarity.