Question

tandem mass spectrometry combines the use of a gas spectrometer and a ___.
component spectrometry
light spectrometry
mass spectrometry
magnetic spectrometry

Explanation:

Tandem mass spectrometry, also known as MS - MS, is a technique that involves two stages of mass spectrometry. The first stage (using a gas spectrometer which is a type of mass spectrometer) separates ions, and the second stage (another mass spectrometry step) further analyzes the selected ions (e.g., by fragmentation and then analyzing the fragment ions). Component spectrometry is not a standard term in this context. Light spectrometry is about analyzing light - related properties (not relevant here). Magnetic spectrometry is a less common and more specific sub - type (not the general term for the second stage in tandem MS).

Answer:

mass spectrometry