摘要
利用色谱氨化学电离质谱(GC-NH3CIMS)法分析了原油及烃源岩中的咔唑类含氮化合物,分析结果与普通色谱质谱(GC-MS)进行了对比与评价。结果表明,氨化学电离质谱法对含氮化合物具有较高的灵敏度和选择性,在氮化物含量较低或有芳烃共逸出的情况下,可以进行定量分析。氨化学电离质谱没有碎片离子产生,质量色谱图上同系物间没有碎片离子产生的相互干扰,定量结果比较准确。
Carbazoles in oils and rocks were identified and quantified by mea ns of gas chromatograph and ammonia chemical ionization mass spectrometry (GC-N H3CIMS). NH3CIMS, compared with EI mass spectrometry, has higher sensitivity and selectivity on nitrogen compounds which usually interfered by polyaromatics. Ni trogen compounds could be quantified exactly even if with poor purity or lower c oncentration. There were not fragments produced in NH3CIMS condition, and theref ore, the quantification of carbazole compounds were not interfered by their larg er molecular homologues.
出处
《地球化学》
CAS
CSCD
北大核心
2004年第4期395-399,共5页
Geochimica
关键词
氮化物
咔唑
色谱
质谱
氨
化学电离
nitrogen compounds
carbazole
chromatograph
mass spectrometry
a mmonia
chemical ionization
