导数光谱也叫微分光谱,是对原始光谱数据进行微分处理而得到的吸光度对波长(或波数)的变化率曲线,实际就是在整个区域内沿原始光谱曲线计算出的每个数据点处的斜率曲线。随导数阶次的递增,依次可得到一阶导数谱、二阶导数谱、n阶导数谱,其吸收带宽依次变窄,峰形变锐,光谱分辨率 Derivative spectroscopy, also called differential spectroscopy, is the curve of the ratio of absorbance to wavelength (or wave number) obtained by differentiating the original spectral data. It is actually the slope at each data point calculated along the original spectral curve in the entire region. curve. With the increase of the derivative order, the first derivative spectrum, the second derivative spectrum, and the nth derivative spectrum can be obtained in turn, and the absorption bandwidth becomes narrower in sequence, the peak shape becomes sharper, and the spectral resolution becomes higher.