基于三维荧光光谱结合小波压缩与APTLD对水中多环芳烃测定

基于三维荧光光谱结合小波压缩与交替惩罚三线性分解(APTLD)对水中多环芳烃(PAHs)进行定性和定量分析，实验以萘(NAP)、芴(FLU)、苊(ANA)为测量样品。首先用FS920荧光光谱仪测量获得样品的三维荧光光谱数据，对数据进行激发和发射校正且去散射，得到真实光谱。为了解决三维荧光光谱数据的冗余信息，通过小波变换对实验光谱数据进行压缩，其压缩分数和数据恢复分数分别大于92%和95%。用APTLD对压缩后的光谱数据进行分析，体现了二阶优势，实验结果表明，在PAHs的荧光光谱严重重叠和有干扰物共存下，该方法仍能准确地测定，其回收率为94%~98%、预测均方根误差小于0.29 μg·L-1。

Determination of Polycyclic Aromatic Hydrocarbons in Water Based on Three Dimensional Fluorescence Spectroscopy Combined with Wavelet Compression and APTLD

Based on the three-dimensional fluorescence spectroscopy combined with wavelet compression and APTLD for the detection of polycyclic aromatic hydrocarbons (PAHs) in water，the rapid determination of PAHs in water was achieved. The samples were prepared by using three kinds of PAHs，naphthalene (NAP)，fluorene (FLU) and acenaphthene (ANA). First，the three-dimensional fluorescence spectra of the samples were measured with FLS920 steady-state fluorescence spectrometer. The data were excited and emitted by calibration and de-scattering to obtain the real spectrum. In order to solve the redundant information problem of three- dimensional fluorescence spectral data，the experimental spectral data is compressed by wavelet transform，and the compression score and data recovery fraction can reach 92% and 95% respectively. APTLD was applied to analyze the compressed data and reflect the second-order advantage. The experimental results show that the method can still be used for rapid determination，and the recovery rate is more than 94% and the predicted root mean square error is less than 0.29 with seriously overlapped and intermittent fluorescence spectra of PAHs.