Laser-induced electron transfer desorption/ionization on MoO and WO surfaces for the determination of dithiocarbamates.

Surface layers of molybdenum oxide MoO and tungsten oxide WO produced by thermal oxidation of molybdenum and tungsten plates in the air were studied for the first time as a platform for laser-induced electron transfer desorption/ionization. High analytical performance of such layers for the determination of metal complexes with dithiocarbamates, such as tetramethylthiuram disulfide, tetraethylthiuram disulfide, and diethyldithiocarbamate, has been demonstrated. All studied complexes are detected as radical cations, with no fragment ions.