A quick, easy, cheap, effective, rugged, and safe pretreatment method using dispersive solid-phase extraction was developed to quantify kasugamycin in Chinese cabbage samples by using ultra-performance liquid chromatography/tandem mass spectrometry. A pretreatment method involving precolumn transformation was utilized to determine the residue of saisentong in Chinese cabbage through high-performance liquid chromatography/ultraviolet detection. These methods were successfully applied through field trials to determine the contents of kasugamycin and saisentong in Chinese cabbage. The dissipation of kasugamycin and saisentong in Chinese cabbage followed first-order kinetics with a linear correlation coefficient of 0.9066–0.9731 at the 95% confidence level. The half-lives of kasugamycin and saisentong in Chinese cabbage were 1.8–2.0 and 2.2–3.8 days, respectively. Terminal residual levels of kasugamycin in Chinese cabbage were not detected 14 days after application. The dietary risk assessment of kasugamycin and saisentong in Chinese cabbage showed that their risk quotients were 0.93 and 2.58%, respectively, in the preharvest interval (PHI) of 14 days. Kasugamycin and saisentong in Chinese cabbage did not pose potential health hazards at PHI of 14 days. The maximum residue limits of kasugamycin and saisentong in Chinese cabbage were 0.02 and 0.36 mg/kg, respectively, and 14 days was the safe PHI.

开发了一种使用分散固相萃取的快速、简单、廉价、有效、耐用且安全的预处理方法，通过使用超高效液相色谱/串联质谱法对大白菜样品中的春日霉素进行定量。采用柱前转化的前处理方法，采用高效液相色谱/紫外检测法测定大白菜中塞森通的残留量。这些方法通过田间试验成功应用于测定大白菜中春雷霉素和塞森通的含量。大白菜中春雷霉素和塞森通的消散遵循一级动力学，在 95% 的置信水平下线性相关系数为 0.9066-0.9731。春雷霉素和塞森通在大白菜中的半衰期分别为1.8-2.0天和2.2-3.8天，分别。施用后14天未检测到大白菜中春雷霉素的终末残留水平。大白菜中春日霉素和塞森通的膳食风险评估表明，在14天的采前间隔（PHI），它们的风险商数分别为0.93%和2.58%。在 14 天的 PHI 条件下，大白菜中的春日霉素和塞森通不会对健康造成潜在危害。春雷霉素和塞森通在大白菜中的最大残留限量分别为0.02和0.36 mg/kg，14天为安全PHI。在 14 天的收获前间隔 (PHI)。在 14 天的 PHI 条件下，大白菜中的春日霉素和塞森通不会对健康造成潜在危害。春雷霉素和塞森通在大白菜中的最大残留限量分别为0.02和0.36 mg/kg，14天为安全PHI。在 14 天的收获前间隔 (PHI)。在 14 天的 PHI 条件下，大白菜中的春日霉素和塞森通不会对健康造成潜在危害。春雷霉素和塞森通在大白菜中的最大残留限量分别为0.02和0.36 mg/kg，14天为安全PHI。