Identification
In the present method, the HPLC photo-diode array detector chosen allow the separation of OTC and SDD and identification of them by retention time and their spectra. The OTC and SDD spectra obtained from samples are practically identical with those of the standards. By way of example, the absorption spectra of the SDD and OTC peaks from an egg obtained with the photodiode array are given in Figure 3.
注:OTC为土霉素 SDD为磺胺二甲基嘧啶