Objective To develop a gas chromatographic method for the determination of 3,4-dinitrofurazanfuroxan(DNTF) in the workplace air.Methods According to Specifications of Air Sampling for Hazardous Substances Monitoring in the Workplace(GBZ 159-2004),the samples were absorbed by glass fiber filters and desorbed by toluene.The HP-5 capillary column and63Ni electrical conductivity detector were selected to determine the compounds.Results Calibration curve of the method was linear within the range 2-20 μg/ml and showed good linearity with r≥0.999.The determination limit of the method was 0.23 μg/ml and the lowest concentration limit was 0.05 mg/m3(45 L air for the test sample).The average levels of percent recovery were 98.2%-100.4%.Conclusion The gas chromatographic method has the characteristics of simple sample handling,high sensitivity and rapid determination,it can be used for the determination of DNTF in the workplace air.