摘要
Solid phase extraction(SPE) and gas chromatography(GC) were combined to establish a method for detecting traces of chlorpyrifos in seawater,and the effects of extraction column type,water sample pH and salinity,and eluant type on the recovery rate of chlorpyrifos were analyzed. The results show that the linear range of the method was 0.02-2.0 μg/ml,and the correlation coefficient was 0.9993; the recovery rate of chlorpyrifos in the seawater samples to which the standard sample of chlorpyrifos averaged 101%-114%; MDL was 0.00851μg/L,and the lower limit of determination for chlorpyrifos was 0.034μg/L; the relative standard deviation ranged from 1.52% to 6.21%(n = 6). The method is simple,sensitive and accurate and has good repeatability. It is suitable for the determination of traces of chlorpyrifos in seawater.
Solid phase extraction(SPE) and gas chromatography(GC) were combined to establish a method for detecting traces of chlorpyrifos in seawater,and the effects of extraction column type,water sample pH and salinity,and eluant type on the recovery rate of chlorpyrifos were analyzed. The results show that the linear range of the method was 0.02-2.0 μg/ml,and the correlation coefficient was 0.9993; the recovery rate of chlorpyrifos in the seawater samples to which the standard sample of chlorpyrifos averaged 101%-114%; MDL was 0.00851μg/L,and the lower limit of determination for chlorpyrifos was 0.034μg/L; the relative standard deviation ranged from 1.52% to 6.21%(n = 6). The method is simple,sensitive and accurate and has good repeatability. It is suitable for the determination of traces of chlorpyrifos in seawater.
基金
Supported by Project of Shanghai Science and Technology Committee(12231203202)
