Splitless mode was selected for 45 s. The oven temperature was programmed as follows: 80 C for 3 min; 15 C/min ramp to 270 C for 5 min. The transfer line temperature was 270 C, and
the ion-trap manifold temperature was 250 C. The ion energy for electron impact (EI) was always 70 eV. Mass detection was performed in full scan mode to identify possible degradation products
of tebuconazole and in single ion monitoring (SIM) mode to measured tebuconazole residues in samples.