What is mass spectrometry used for in drug identification?

What is mass spectrometry used for in drug identification?

• A. To provide actual specific identification by sorting molecular fragments by mass.
• B. To measure the color change of a compound.
• C. To separate compounds by size.
• D. To detect odor compounds.

Answer: (A)

Mass spectrometry provides actual specific identification by analyzing how molecules break apart and by measuring their exact masses. In a mass spectrometer, the sample is ionized and the ions are separated based on their mass-to-charge ratio. The detector records a spectrum showing peaks for the molecular ion and for characteristic fragments. This fragmentation pattern serves as a fingerprint for the compound, and when compared to reference spectra or exact-mass data, it confirms the molecule’s identity with high confidence. This approach is different from color changes used in some tests, which are not highly specific; from separating compounds by size, which is the domain of certain chromatographic or physical separation methods; and from detecting odor, which is subjective and not precise for identifying exact chemical structures. In practice, mass spectrometry is often paired with chromatography (like GC-MS or LC-MS) to both separate mixtures and provide definitive identification through mass data and fragmentation patterns.

Mass spectrometry provides actual specific identification by analyzing how molecules break apart and by measuring their exact masses. In a mass spectrometer, the sample is ionized and the ions are separated based on their mass-to-charge ratio. The detector records a spectrum showing peaks for the molecular ion and for characteristic fragments. This fragmentation pattern serves as a fingerprint for the compound, and when compared to reference spectra or exact-mass data, it confirms the molecule’s identity with high confidence.

This approach is different from color changes used in some tests, which are not highly specific; from separating compounds by size, which is the domain of certain chromatographic or physical separation methods; and from detecting odor, which is subjective and not precise for identifying exact chemical structures. In practice, mass spectrometry is often paired with chromatography (like GC-MS or LC-MS) to both separate mixtures and provide definitive identification through mass data and fragmentation patterns.