乙胺和二甲胺分子(n_N,3s)里德堡态共振的多光子电离

The multiphoton ionization spectra of ethylamine and dimethylamine are presented in the 400-470nm region, with resonance excitation to 3s Rydberg state. The MPI fragmentation patterns of two C2H7N isomers are readily distinguished . For ethylamine, the most prevalent fragmentation is β-Cleavage, while for dimethylamine that is H atom ejection.

气相色谱法直接测定水中微量有机胺

用配有氢火焰离子化检测器(FID)的气相色谱仪直接测定水中多种微量有机胺。试样经过滤后直接进样,在气相色谱仪上使用CP7448毛细管柱,用外标法测定水中微量甲胺、二甲胺、一乙胺、二乙胺的含量。在所选择的色谱操作条件下,甲胺、二甲胺、一乙胺、二乙胺的质量浓度分别在一定范围内与峰面积呈良好的线性关系。4种组分的回收率分别为96.7%,99.0%,101.2%,99.2%;精密度分别为4.3%,3.7%,5.5%,3.1%;检出限分别为2.0,2.0,1.5,1.5m g/L。该方法操作简便,回收率、精密度高。