| 摘要 |
<p>A method by which high-sensitivity mass spectrometry is realized by arranging in series a plurality of linear quadruple high-frequency electrodes and operating the electrodes as a mass filter and an ion-trap mass spectrometer. A background removing mass filter having a linear quadruple electrode structure is cascade-connected to the above-mentioned spectrometer as needed. Background ions are removed and the analysis sensitivity is improved. In addition, loss of minor ions in the ion trap is prevented, destruction of trace is prevented, and contamination of the ion trap electrodes is reduced.</p> |
