【摘要】 基于液液萃取和气相色谱-四极杆静电场轨道阱质谱联用技术（GC-Orbitrap-MS），建立了快速分析饮用水中11种常见嗅味物质的高灵敏检测方法。考察了质谱的4种扫描模式在分析嗅味物质时的性能，选择平行反应监测扫描（PRM）模式进行定量分析。在优化条件下，所有物质的标准曲线具有较好线性（r²>0.99），方法检出限和定量下限分别为0.1～2.0 ng·L^-1和0.4～6.7 ng·L^-1；自来水中嗅味物质在3个浓度下的加标回收率为76.1%～120%，相对标准偏差（n=6）为4.1%～18%，可满足定量分析要求。采用该方法对北京市17份水源水和44份末梢水进行分析，除2-甲氧基-3,5-二甲基吡嗪和2,4,6-三氯苯甲醚外各物质均有检出。该研究可为饮用水嗅味监测或相关事件提供技术支撑。更多还原

【Abstract】 A highly sensitive determination method capable of rapidly analyzing 11 common odorants in drinking water was successfully established using liquid-liquid extraction and gas chromatographyquadrupole electrostatic field orbitrap mass spectrometry（GC-Orbitrap-MS）. Four different scanning modes,GC gradient elution and other mass parameters were thoroughly investigated. Under the optimal conditions,the standard curves of all target substances showed good linearity with correlation coefficients（r²） greater than 0. 99. The method detection limits were between 0. 1 and 2. 0 ng·L^-1,and the quantitation limits were between 0. 4 and 6. 7 ng·L^-1. Recoveries of the target odorants at three spiking levels in tap water samples ranged from 76. 1% to 120%,with relative standard deviations（n=6） of 4. 1%-18%. The established method was applied to analyze 17 source water samples and 44 terminal water samples collected from Beijing. Results showed that all target odorants were detected except for 2-methoxy-3,5-dimethylpyrazine and 2,4,6-trichloroanisole. This method is accurate and sensitive and may provide technical support for drinking water monitoring and relevant incidents responding.更多还原