@article{oai:kansai-u.repo.nii.ac.jp:00011533, author = {Okuno, Shoji and Arakawa, Ryuichi and Wada, Yoshinao}, issue = {1}, journal = {Journal of the Mass Spectrometry Society of Japan}, month = {}, note = {Understanding ion-molecular reactions is suggested to be essential to delineating the mechanisms of matrix-assisted laser desorption/ionization (MALDI) and related ionization methods. To examine the implications of matrix-analyte reactions in the reduction observed in MALDI, copper(II) chloride and riboflavin were analyzed by desorption/ionization on porous silicon (DIOS) mass spectrometry. This system does not require a matrix for soft laser desorption/ionization. The two susbstances were reduced by DIOS as well, and the reduction of riboflavin was accelerated using water as a solvent, as reported in MALDI. The results indicated that target-analyte electron transfer occurs in LDI, although the possibility of matrix-analyte electron transfer in MALDI cannot be excluded.}, pages = {13--20}, title = {Reduction of Cu(II) and Riboflavin in DIOS Mass Spectrometry}, volume = {52}, year = {2004} }