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  • Title: Effect of impurities on the matrix-assisted laser desorption/ionization mass spectra of insulin.
    Author: Bajuk A, Głuch K, Michalak L.
    Journal: Rapid Commun Mass Spectrom; 2001; 15(24):2383-6. PubMed ID: 11746906.
    Abstract:
    The effect of impurity (sodium sulfate Na2SO4; copper sulfate CuSO4; potassium ferrocyanide K4Fe(CN)6; and triammonium citrate (NH4)3C6H5O7) concentration on the positive matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) spectra of insulin is described. 2,5-Dihydroxybenzoic acid was used as a desorption matrix. The estimated maximum concentrations of tested salts for which no insulin signal was observed were determined.
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