SPECTROMETRY, MASS, MATRIX ASSISTED LASER DESORPTION IONIZATION
\spɛktɹˈɒmətɹi], \spɛktɹˈɒmətɹi], \s_p_ɛ_k_t_ɹ_ˈɒ_m_ə_t_ɹ_i]\
Definitions of SPECTROMETRY, MASS, MATRIX ASSISTED LASER DESORPTION IONIZATION
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A mass spectrometric technique that is used for the analysis of large biomolecules. Analyte molecules are embedded in an excess matrix of small organic molecules that show a high resonant absorption at the laser wavelength used. The matrix absorbs the laser energy, thus inducing a soft disintegration of the sample-matrix mixture into free (gas phase) matrix and analyte molecules and molecular ions. In general, only molecular ions of the analyte molecules are produced, and almost no fragmentation occurs. This makes the method well suited for molecular weight determinations and mixture analysis.
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