建立了土壤中20种有机氯农药、16种酞酸酯和18种多氯联苯的全二维气相色谱-质谱分离和定性方法。土壤样品与无水Na2SO4(1:1,m/m)混匀后,用丙酮、正己烷(1:1,V/V)在微波快速溶剂萃取仪上以1600W的功率,在20 min内从室温升至110℃,并保持20 min的条件进行萃取。通过优化升温速率、调制周期及热喷时间等参数,该方法能够在40.5 min内分离目标化合物及土壤萃取杂质,并通过二维谱图和质谱检索对54种目标化合物准确定性。 A total of 20 organochlorine pesticides, 16 kinds of phthalates and 18 kinds of PCBs in soil by gas chromatography - mass spectrometry and qualitative methods were established. The soil sample was mixed with anhydrous Na2SO4 (1: 1, m / m) and then eluted with acetone, hexane (1: 1, V / V) on a microwave rapid solvent extractor at 1600 W for 20 min The room temperature was raised to 110 ° C and extracted for 20 min. By optimizing parameters such as heating rate, modulation period and thermal spraying time, this method can separate target compounds and soil extraction impurities in 40.5 min, and accurately identify 54 target compounds by two-dimensional spectroscopy and mass spectrometry.