Carbon nano coatings: new approach to obtaining mass spectra of low molecular compounds using surface assisted laser desorption/ionization mass spectrometr
T12N3
D.S. Kosyakov, E.A. Sorokina, N.V. Ul’yanovskii, E.A. Varakin,
D.G. Chukhchin, N.S. Gorbova
A simple and rapid way to obtain the targets for investigation of low molecular weight compounds by surface-assisted laser desorption / ionization mass spectrometry (SALDI), comprising a vacuum sputtering of the carbon layer with thickness of about 50 nm onto the metal surface, is proposed. The resulting coatings are characterized by homogenity, hydrophobicity and a high mechanical strength, eliminating the possibility of contamination of the mass spectrometer. The comparison of the SALDI mass spectra of test compounds recorded with the aid of conventional carbon materials and carbon nanocoating demonstrates such advantages of the latter as high spectral resolution and the absence of spectral interferences in the low values of m/z.
