Experimental curriculum design for undergraduates based on the improvement of scientific research abilities： taking determination of pyrimidine fungicides in soil by QuEChERS-gas chromatography-mass spectrometry as an example

was the best purification combination； the linear range of the three fungicides was 0.05-2.0 mg/L， the correlation coefficient was ≥0.995， the LOD was≤0.05 mg/kg and the LOQ was ≤0.167 mg/kg， which was suitable for trace detection. Teaching practice shows that the scheme improves students' learning initiative and classroom interaction， enhances the quality of experimental reports， lays a foundation for subsequent scientific research experiments， and has important promotion value for the experimental teaching reform of related majors in colleges and universities.