| 摘要 |
<p>In the present invention, after a first sample injection, the intensities of product ions derived from a prescribed component are measured while a collision energy (CE) voltage is varied in a coarse adjustment mode having a large step width and a broad voltage range (S1-S2). After the completion of the measurements, the peak intensity and the degree of change in the ion intensity before and after the voltage exhibiting the peak intensity are calculated for each CE voltage (S3-S4). If the degree of change is less than or equal to a threshold value, a fine adjustment mode is not implemented, and the CE voltage exhibiting the peak intensity in the coarse adjustment mode is determined to be the optimal value (No in S5; S10). Conversely, if the degree of change in the ion intensity exceeds the threshold value, a narrower CE voltage range and a smaller step width are determined on the basis of the measurement results from the first sample injection, a second sample injection is carried out, and the ion intensity is measured while the CE voltage is varied in the fine adjustment mode (S6-S8). The CE voltage exhibiting the peak intensity in the fine adjustment mode is determined to be the optimal value (S9-S10). This configuration makes it possible to determine the optimal value for CE voltage by analyzing at most two sample injections.</p> |
