| 摘要 |
<P>PROBLEM TO BE SOLVED: To secure accuracy of identification while shortening the time for analysis by suppressing the number of fractions to perform MS<SP POS="POST">2</SP>analysis thereon when comprehensively identifying substances contained in a sample. <P>SOLUTION: Regarding a three-dimensional graph, with a hold time, m/z and signal strength on three axes, created based on a result of performing MS<SP POS="POST">1</SP>analysis on all fraction samples (S1-S2), peak detection is performed by determining the strength with a threshold value θ<SB POS="POST">N</SB>greater than ω, and the fraction sample in which a peak top of the detected peak is present, is selected as MS<SP POS="POST">2</SP>analysis target (S3-S5). Next, a peak of which the peak top is present in the selected fraction sample and of which the strength is equal to or greater the threshold value ω is detected and the detected peak is presented as a precursor ion candidate (S6). Then, MS<SP POS="POST">2</SP>analysis is executed successively on the precursor ion candidates until identifying substances contained in the selected fraction sample (S7-S9, S14-S15). Since many precursor ion candidates can be presented for one fraction sample, an identification probability of substances contained in the fraction sample is improved. <P>COPYRIGHT: (C)2013,JPO&INPIT |
