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Comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry(GC×GC-TOFMS)was applied to the quick qualitative analysis of 17 types of polychlorinated dibenzo-p-dioxins and furans(PCDD/Fs)from the iron ore sintering process.The GC×GC-TOFMS parameters were evaluated and optimized to yield a complete separation for the 17 types of PCCD/Fs from interference and to the attainment of high sensitivity.After optimization,all the 17 types of PCCD/Fs were separated within 42.5 min.The critical and most toxic tetrachlorodibenzo-p-dioxin(TCDD)detection can be up to 0.5 μg /L.The method was used to analyze real fly ash samples.Accurate identification and determination of all the analyses were by GC×GC,mass spectrum library and ion ratio.The technique is thought to be a substitute for and a supplement to high resolution gas chromatography/high resolution mass spectrometry(HRGC/HRMS)in the field of dioxin analysis.
Comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GC × GC-TOFMS) was applied to the quick qualitative analysis of 17 types of polychlorinated dibenzo-p-dioxins and furans (PCDD / Fs) from the iron ore sintering process.The GC × GC-TOFMS parameters were evaluated and optimized to yield a complete separation for the 17 types of PCCD / Fs from interference and to the attainment of high sensitivity. After the optimization, all the 17 types of PCCD / Fs were separated within 42.5 min. The critical and most toxic tetrachlorodibenzo-p-dioxin (TCDD) detection could be up to 0.5 μg / L. The method was used to analyze real fly ash samples. Accrate identification and determination of all the analyzes were by GC × GC, mass spectrum library and ion ratio. The technique is thought to be a substitute for and a supplement to high resolution gas chromatography / high resolution mass spectrometry (HRGC / HRMS) in the field of dioxin analysis.