采用裂解气相色谱/质谱法剖析船用沥青

采用裂解气相色谱/质谱联用方法对三种不同类型的沥青进行分析研究,选择在550℃裂解,其裂解产物通过SE-54高效毛细管柱分离和质谱鉴定,提供了有关这三种沥青各自结构的特征信息。通过碎片峰相对峰面积的比较,可区分不同产地的石油沥青样品。具有样品无需前处理,用量少,谱图直观,对应性强,灵敏度高等特点。

Identification of asphalt for ship by pyrolysis-gas chromatograhpy/mass spectrometry

Three kinds of asphalt have been analyzed by pyrolysis gas chromatography-mass spectrometry (PyGC-MS). All pyrolysis products referred to were separated by a fused-silica capillary column (SE54 30m × 0.25mm × 0.25μm) and identified by mass spectrometry.The asphalt coating could be identified for three types, they are native pitch, petroleum pitch and coal tar pitch. Use this technique can also easily detect different area s petroleum pitch for analyzing the peak area in total-ion chromatogram. This method is sensitive, accurate, convenient, and involves minimal sample manipulation.