A new method to resolve nearly overlapping spectra is proposed.By means of derivative spectrum the discrepancy of constituents can be enlarged,thus the analytical sharpness of separation was improved.

• 利用导数光谱能增大组分的光谱差异,从而提高二维联用数据解析的分辨率,通过将二维数据对波长求导,以解析光谱相近的同系物体系。