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← ScienceWhich outcome occurs when a laser desorbs large, fragile molecules for mass spectrometry?
A)Analyte fragmentation decreases resolution✓
B)Ionization efficiency increases dramatically
C)Matrix signal suppression intensifies
D)Background noise decreases significantly
💡 Explanation
When a laser desorbs fragile molecules, the energy input can cause excessive internal vibrational excitation leading to analyte fragmentation, because bonds break before ionization, reducing the mass resolution. Therefore fragmentation becomes a dominant issue, rather than other effects needing tuned molecular concentrations.
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