英语语法分析

The product was identi-fied by elemental and spectral analyses.

对合成的配合物进行了元素及光谱分析。

Structute of nitrogen heterocyclic ring quaternary ammonium salt cationic surfactants was identi fied by mass spectrography, nuclear magnetic resonance spectra, infrared spectra and etc.

用质谱法、核磁共振波谱法、红外光谱法等，确定了未知氮杂环季铵盐型阳离子表面活性剂的结构。