关键词: 便携式, 离子阱, 质谱器, 有机毒物, 方法研究

Abstract: Objective To establish a method for simultaneously detecting ten kinds of common organic toxicants in workplace by a portable ion trap mass spectrometer technique. Methods The instrument probe was used for sampling and detection. The samples were separated with DB-5MS chromatographic column. The retention time and characteristics of the ions by ion trap mass spectrometry were used for qualitative analysis,and standard curve method was used for quantitative analysis. Results The qualitative results of the self-built ion trap mass spectrometer library were more reliable than those of the NIST mass spectrometer library. The determination of common organic toxicants were linear relation in the concentration range of 2.00-50.0 ppb,and the linear correlation coefficients were all >0.999 0. The minimum detection concentration was 0.05-0.30 μg/m³,and the minimum quantitation concentration was 0.16-1.02 μg/m³. The within-run and the between-run relative standard deviation were 1.6%-5.4%（n=6） and 1.0%-4.1%（n=6） respectively,and the standard recovery rate was 95.3-101.3%. Multiple organic toxicants in the workplace had no interference with the measurement results. Conclusion This method is suitable for simultaneous determination of common organic toxicants in workplace,and the sensitivity and minimum detection limit of this method are superior to that of portable quadrupole mass spectrometry.

Key words: Portable, Ion trap, Mass spectrometry, Organic toxicants, Methods research