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Within mass spectrometry, which mechanism enables isotope ratio determination?

A)Magnetic field induced ion deflection
B)Photoionization cross-section variations
C)Electron multiplier gain adjustments
D)Quadrupole resonance frequency stabilization

💡 Explanation

Ions are deflected based on their mass-to-charge ratio during mass spectrometry, providing separate signals; this is the mass analyzer mechanism. Therefore, mass differences indicate different isotopes, rather than being controlled by photoionization or detectors in other processes.

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