In the second-step identification, the resolution of spectrum in the secondary derivative IR spectra was better than that of 1D-IR.Furthermore, the rule of spectra in 1D-IR was further demonstrated.

• 在二级鉴定中，二阶导数谱显示了比一维红外谱图更高的分辨率，同时进一步确认一维红外谱图的成谱规律；