Analysis of amino acids as N-dithiocarbamic derivatives. A comparison of electron impact and field ionization mass spectra
作者:Janusz Szafranek、Grzegorz Blotny、Paul Vouros
DOI:10.1016/0040-4020(78)88416-6
日期:1978.1
to their N-dithio-alkylcarbamate derivatives by reaction with carbon bisulfide in basic solution followed by reaction with ethyl bromide to form an ethyl thioester. The derivatives are sufficiently volatile for mass spectrometric analysis via the direct inlet probe, without the need for further esterification of the carboxylic acid group. The electronimpactspectra exhibit relatively intense molecular