聚丙烯腈和二氧化硅复合纤维膜富集-高分辨质谱法测定烟气中的有害化合物

发布时间：2018-01-02 04:10

本文关键词：聚丙烯腈和二氧化硅复合纤维膜富集-高分辨质谱法测定烟气中的有害化合物　出处：《分析化学》2017年02期 　论文类型：期刊论文

【摘要】：以聚丙烯腈(PAN)和二氧化硅(SiO_2)纳米粒子的混合溶液为纺丝溶液,采用静电纺丝技术制备具有高吸附性能的新型PAN-SiO_2疏水性复合纤维膜,对香烟燃烧产生的烟气进行富集,用甲醇作为洗脱溶剂,对待测组分进行洗脱,并使用高分辨串联质谱技术进行测定。实验结果表明,通过调控PAN和SiO_2纳米粒子的浓度,优化静电纺丝参数,得到对小分子有机化合物吸附性较强的纤维膜。对所收集到的烟气进行质谱测定,在正离子模式下,检测到的主要成分有尼古丁、丙酮、苯乙烯、丙烯醛、异戊二烯、丙烯腈等21种小分子有机化合物;在负离子模式下,检测到的主要成分有水杨酸、苹果酸和乳酸等6种有机酸。同时,对烟气中的主要有害成分尼古丁进行定量分析,方法的检出限为0.071 ng/L,定量限为0.236 ng/L。
[Abstract]:The mixed solution of polyacrylonitrile (PAN) and silica (SiO2) nanoparticles was used as spinning solution. A novel PAN-SiO_2 hydrophobic composite fiber membrane with high adsorption performance was prepared by electrostatic spinning technology. The flue gas from cigarette combustion was enriched and methanol was used as elution solvent. The components were eluted and determined by high resolution tandem mass spectrometry. The experimental results showed that the parameters of electrostatic spinning were optimized by adjusting the concentration of PAN and SiO_2 nanoparticles. The fiber membrane with strong adsorbability to small molecular organic compounds was obtained. The main components were nicotine, acetone, styrene and acrolein in the positive ion mode by mass spectrometry. Isoprene, acrylonitrile and other 21 small molecular organic compounds; Six organic acids, salicylic acid, malic acid and lactic acid, were detected in the negative ion mode, and nicotine, the main harmful component in flue gas, was analyzed quantitatively. The detection limit of the method was 0.071 ng / L and the quantitative limit was 0.236 ng / L.
【作者单位】：吉林大学无机合成与制备化学国家重点实验室;吉林大学环境与资源学院;东华理工大学江西省质谱科学与仪器重点实验室;长春中医药大学;
【基金】：吉林省科技厅重点科技攻关项目(No.20160204027YY) 吉林省教育厅"十三五"科学技术研究项目(No.2016002)资助
【分类号】：X831;O657.63
【正文快照】： 1引言香烟烟气化学成分复杂,主要是由刺激性气体和致癌的焦油颗粒物混合组成,目前已鉴定出的化学物质有近5000种[1~3],其中已被证实的有致癌、致畸、致突变作用的化合物有50种[4],例如尼古丁[5]、亚硝胺[4,6]、多环芳烃[7]等。香烟燃烧产生的烟气损伤吸烟者呼吸道的上皮细胞

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