Abstract
Combined liquid chromatography-mass spectrometry (LC-MS) is increasingly used as a powerful technique in research and quality control. Among thermospray, FAB and electrospray, atmospheric pressure chemical ionization (APCI) is a powerful technique for high flow-rate LC-MS. APCI has primarily been used with a quadrupole mass spectrometer, where only low mass resolution experiments are possible. In this article we describe a newly designed APCI source for high-accelerating-voltage and high-resolution double focusing mass spectrometers. Detection in the pg range is possible.
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