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Given below is the diagram of the drift tube of a tandem quadrupole/time of flight instrument. Identify the unmarked component.

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Given below is the diagram of the drift tube of a tandem quadrupole/time of flight instrument. Identify the unmarked component.

(a) Nebuliser

(b) Filter

(c) Chopper

(d) Acceleration lens

The question was posed to me during an online exam.

This intriguing question comes from Tandem Mass Spectroscopy topic in portion Mass Spectrometer of Analytical Instrumentation

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Correct option is (d) Acceleration lens

The best I can explain: The unmarked component is acceleration lens. A collision cell is located before the acceleration lens.

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