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. 2020 Jun 30;26(4):241–273. doi: 10.1177/1469066720939399

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© The Author(s) 2020

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Figure 9. — JEOL JMS-700 magnetic sector mass spectrometer (a) equipped with a FI/FD source; the numbers denote ① ion source housing, ② vacuum lock for FI/FD probe, ③ FI/FD probe, ④ GC interface, ⑤ reservoir inlet; the direct insertion probe would be located opposite to the GC interface. (b) The FI/FD source can be accessed via ⑥ GC interface, ⑦ reservoir inlet, and direct insertion probe (would be behind contacts on the right). Here, the ⑧ counter electrode is slotted for vertical emitter orientation, i.e., parallel to the analyzer entrance slit.