目的: 通过污水毒品监测技术进行新精神活性物质异丙咪酯(依托咪酯同系物)的预警,并开展定量研究,为列管及执法打击工作提供技术支撑。方法: 通过在线固相萃取-超高效液相色谱-三重四极杆质谱联用(online solid phase extraction-ultra high performance liquid chromatography tandem mass spectrometry, Online-SPE-UPLC-MS/MS)的多反应监测模式(multiple reaction monitoring,MRM)定量分析获知异常结果,前体离子扫描模式定性确定异常物质基本信息,结合化合物定向合成后的超高效液相色谱-四极杆-静电场轨道阱高分辨质谱(ultra high performance liquid chromatography quadrupole-orbitrap high resolution mass spectrometry,UPLC-Q Exactive HRMS)平行反应监测(parallel reaction monitoring,PRM)模式进行定性确定,后购置市售对照品开展定量研究,并将所得结果运用SPSS 27进行相关性分析。结果: 确定异常物质为异丙咪酯,并通过优化MRM参数可利用特定离子丰度比实现与其同分异构体的区分,定量结果相关性分析结果表明其与依托咪酯和氯胺酮滥用地区趋同。结论: 在污水毒品监测过程中,需关注原型与代谢物的比例关系,总结归纳特定类型化合物的特征碎片及特征中性丢失信息,针对监测过程中的重点地区重点样本开展筛查性非靶向检测,结合高分辨质谱等手段进行潜在物质的分析,充分发挥污水毒品监测的预警作用。
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