Table 1 The maximum excitation and emission wavelengths of the PDE-DNS derivatization product and its fluorescence intensities in different organic extraction solvents
Extraction solvent | λ ex / λ em (nm) | Fluorescence intensity a | |
|---|---|---|---|
Sample | Blank | ||
Dichloromethane | 340/496 | 540.3 | 3.6 |
Chloroform | 337/494 | 432.7 | 3.5 |
Diethyl ether | 330/489 | 391.5 | 3.0 |
Ethyl acetate | 323/459 | 876.9 | 636.3 |