ABSTRACT
OBJECTIVE: To establish a method for simultaneous determination of 1,2-dichloropropane and 1,3-dichloropropane in workplace air by solvent desorption-gas chromatography.METHODS: The air samples were collected by activated carbon tube and desorbed with carbon disulfide,then separated by DB-1 capillary columns,and detected by gas chromatographic.RESULTS: The linear ranges of 1,2-dichloropropane and 1,3-dichloropropane were 1.16-17 400.00 mg/L and 1.19-17 850.00 mg/L of mass concentration,respectively.The correlation coefficient was 0.999 9,and the limit of detection was 0.07 mg/L.The average desorption efficiencies of 1,2-dichloropropane and 1,3-dichloropropane were 96.9%-98.2%and 95.8%-96.8%,respectively.The within-run relative standard deviation( RSD) was 0.4%-0.6%.The between-run RSD were 1.6%-3.2% and 1.2%-2.8% respectively.The samples could be stored at room temperature for at least 14 days.CONCLUSION: This method has high desorption efficiency and sensitivity with good precision and simple operation,which is suitable for simultaneous detection of 1,2-dichloropropane and 1,3-dichloropropane in the workplace air.
