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Which 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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