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| Triple quadrupole mass spectrometry for the analysis of 17dioxins and furans in environmental samples |
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Abstract A method for determining 17dioxins and furans in environmental samples using gas chromatography coupled to triple quadrupole mass spectrometry (MS/MS) had been studied. Good linearity was obtained for the concentration ranged from 0.5to 2000ng/mL. The relative response factors were ranged from 0.96to 1.21, with the relative standard deviation below 14% for the 17congeners. The levels of quantitative of this method were at the range of 0.080~2.83pg/μL, which was suitable for ultra-trace dioxin analysis in environmental samples. Three sediments from the 15th round of intercalibration study were used as certified reference materials to confirm this analytical method. The obtained results are satisfactory. More than 40 environmental samples, including flue gas, fly ash, soil, and sediment were analysed using MS/MS. The obtained results were also compared with results by high resolution mass spectrometry (HRMS). Good linear correlation (R2=0.997) was observed when the concentration values ranged from 0to 60ng I-TEQ. For specific congeners, values of 2,3,7,8-TCDF and 1,2,3,7,8,9-HxCDF obtained by MS/MS were higher than by HRMS. However, value results of 1,2,3,7,8,9-HxCDD were lower. Because of the low cost of MS/MS on purchase, maintenance, and energy consumption, this method can be a simple and economic method for ultra-trace dioxin analysis in environmental samples.
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Received: 20 July 2013
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