七年代初用于小分子分析鉴定的电离技术，如：电子轰击(Electron impact, EI)电离和化学电离(Chemical ionization, CI)技术等。质量分析 器主要为磁场分析器(magnetic Sector)。
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运用GC/MS的电子电离和化学电离技术，考察了精神病患者头发中精神药物及其代谢物的存在状况；
The presence of therapeutic drugs and their metabolites in the hair of psychiatric patients was investigated using GC/EIMS and GC/PCIMS.
并比较了正离子化学电离方式和负离子化学电离方式测定氯化苦的灵敏度。
The sensitivity for the measurement of chloropicrin by the modes of positive ion and negative chemical ionization was compared.
研究了胆甾醇酯类和胆甾醇卤代物的电子轰击电离（EI）、场解吸电离（FD）、化学电离（CI）的质谱。
Mass spectra (MS) of cholesterol esters and halides were obtained by means of Electron Impact (EI), Field Desorption (FD) and Chemical Ionization (CI).
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