Some aspects of the stability of ion current in a matrix‐assisted laser desorption/ionization source

Abstract

The effect of laser exposure (the number of laser shots) on the stability of production of matrix (gentisic acid, sinapinic acid, nicotinic acid and benzoic acid) and biomolecule (insulin and cytochrome-c) ions is presented. Two methods of sample preparation, dried-droplet and pressure, were examined. In the case of pressure preparation, the dry powder sample was pressed mechanically with a pressure of 30 MPa. The best results were obtained for the pressure method and gentisic acid as matrix.

Formation of nanoparticles and nanorods via UV irradiation of AgNO3 solutions

“…There are many methods of sample preparation in the laser desorption method, the most commonly used one is the dried-droplet method [21,22]. This method was applied for investigation presented here.…”

Mass-Spectrometric Investigations of Silver Clusters

“…There are many methods of sample preparation in the laser desorption method, the most commonly used one is the dried-droplet method [18,19]. This method was applied for investigations presented here.…”

Structural transformations in graphite induced by magneto-mechanical-milling in hydrogen atmosphere

“…The LTOF MS, described in detail elsewhere [12][13][14][15][16][17][18], was used for the mass characterization of the graphite powder milled in hydrogen atmosphere as well as for the starting graphite, which was a reference sample. The graphite sample placed on the holder was lighted by the focused pulsed laser beam (Fig.…”