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应用项空固相微萃取法提取尿中邻、间、对位二氯苯。0．5mL检尿密封在12mL玻璃瓶中，30℃下用100μm聚二甲基硅氧烷萃取头萃取15min。用重氢对二甲苯作内标。选择离子监测m/z146（二氯苯异构体）和m／z116内标）两分子离子峰。以得到的上述两峰面积之比为纵坐标，以二氯苯异构体的浓度为横坐标做校正曲线。尿中检测浓度可达0．01mg/L。用此方法快速准确地测定了二氯苯中毒患者尿中浓度的经时变化。
Application of air - solid phase microextraction method for extraction of ortho, meta and para dichlorobenzene in urine. A 0.5 mL urine test was sealed in a 12 mL glass vial and extracted with a 100 μm polydimethylsiloxane extraction head at 30 ° C for 15 min. With heavy hydrogen paraxylene as an internal standard. Selected ion monitoring m / z146 (dichlorobenzene isomers) and m / z116 internal standard) two molecular ion peaks. The obtained ratio of the two peak areas as the ordinate, dichlorobenzene isomer concentration as the abscissa of the calibration curve. Urine test concentrations up to 0.01mg / L. With this method, the urine concentration in patients with dichlorobenzene poisoning was rapidly and accurately determined over time.