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首页> 中文期刊> 《烟草科技》 >气相色谱-质谱法测定烟草中多氯联苯

气相色谱-质谱法测定烟草中多氯联苯

         
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摘要

为加强口含烟烟叶原料外源性污染风险管控,对烟叶中可能含有的多氯联苯(PCBs)的定性定量检测方法进行了研究,建立了同时检测烟草中7种指示性PCBs的气相色谱-质谱方法,并对国内外42个片烟样品进行了检测.烟末样品经萃取、真空浓缩、二次溶解净化后,直接用气质联用仪在选择离子监测模式下检测,采用内标法定量.结果表明:①7种PCBs的浓度/响应值关系拟合曲线线性良好,R2在0.9843~0.9948之间.②在优化条件下,7种PCBs的检出限和定量限分别为0.22~1.07和0.73~3.57 ng·mL-1,样品加标回收率为70.4%~95.5%,日内和日间相对标准偏差分别≤4.6%和9.2%.③7种PCBs在42个样品中有不同程度的检出,总量最高为0.37 mg·kg-1,均低于食品中PCBs的限量标准(总量≤0.5 mg·kg-1).该方法简单、快速,适用于烟草样品中PCBs的检测.%In order to control exogenous contamination risks for raw materials used in oral tobacco products, a qualitative and quantitative analysis method for polychlorinated biphenyls(PCBs)in tobacco leaves was established. The developed method for the simultaneous determination of seven PCBs in tobacco by gas chromatography-mass spectrometry(GC-MS)was applied to test 42 domestic and imported tobacco samples. After extraction, vacuum concentration to drying, re-dissolving and purification, the tobacco powder samples were quantified by gas chromatography-mass spectrometry(GC-MS)with internal standards. The results showed that: 1)The linearity of curves of the seven PCBs'concentration-response relationship was good with the correlation coefficient range between 0.984 3-0.994 8. 2)The limit of detection and the limit of quantification were 0.22-1.07 and 0.73-3.57 ng·mL-1, respectively. The spiked recovery ranged from 70.4% to 95.5% with the intra-day and inter-day relative standard deviations no more than 4.6% and 9.2%, respectively. 3)Different amounts of the seven PCBs were detected in the 42 samples with the maximum total amount of 0.37 mg·kg-1, which was lower than the limit level of PCBs in food(≤0.5 mg·kg-1in total). This method is simple, rapid and suitable for the detection of PCBs in tobacco samples.

著录项

  • 来源
    《烟草科技》 |2017年第9期|49-54|共6页
  • 作者

    李鹏; 沈轶; 刘俊辉; 曾世通; 简小鹏; 赵文涛; 孙世豪;

  • 作者单位

    中国烟草总公司郑州烟草研究院;

    郑州高新技术产业开发区枫杨街2号 450001;

    上海新型烟草制品研究院;

    上海市虹桥区大连路789号 200082;

    中国烟草总公司郑州烟草研究院;

    郑州高新技术产业开发区枫杨街2号 450001;

    中国烟草总公司郑州烟草研究院;

    郑州高新技术产业开发区枫杨街2号 450001;

    上海新型烟草制品研究院;

    上海市虹桥区大连路789号 200082;

    上海新型烟草制品研究院;

    上海市虹桥区大连路789号 200082;

    中国烟草总公司郑州烟草研究院;

    郑州高新技术产业开发区枫杨街2号 450001;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 TS411.1;
  • 关键词

    烟草; 多氯联苯(PCBs); 气相色谱-质谱(GC/MS);

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