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 electron impact spectra exhibit relatively intense molecular
通过在碱性溶液中与二硫化碳反应,然后与溴乙烷反应形成乙基硫酯,将氨基酸转化为其N-二硫代烷基氨基甲酸酯衍生物。衍生物具有足够的挥发性,可通过直接入口探针进行质谱分析,而无需进一步酯化羧酸基团。电子冲击光谱在峰中显示出相对强烈的分子,并在结构上诊断出碎片离子。比较了电子碰撞质谱和场电离质谱的一般特征。