指出负离子解吸化学电离质谱对鉴别低碳醣的分子离子可以提供十分有用的信息。

It pointed out that the negative ion DCIMS can provide very useful information for characterizing molecular ion of monosaccharides.

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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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