高级检索
    姚秀娟, 王书舟, 李俊玲, 王冬梅. 动态三磁场塞曼背景校正石墨炉原子吸收法测定工作场所空气中铅及其化合物[J]. 环境卫生学杂志, 2016, 6(6): 420-424. DOI: 10.13421/j.cnki.hjwsxzz.2016.06.008
    引用本文: 姚秀娟, 王书舟, 李俊玲, 王冬梅. 动态三磁场塞曼背景校正石墨炉原子吸收法测定工作场所空气中铅及其化合物[J]. 环境卫生学杂志, 2016, 6(6): 420-424. DOI: 10.13421/j.cnki.hjwsxzz.2016.06.008
    shu
    YAO Xiujuan, WANG Shuzhou, LI Junling, WANG Dongmei. Determination of Lead and its Compounds in Workplace Air by GFAAS with Dynamic Tri-magnetic Field Zeeman Background Correction[J]. Journal of Environmental Hygiene, 2016, 6(6): 420-424. DOI: 10.13421/j.cnki.hjwsxzz.2016.06.008
    Citation: YAO Xiujuan, WANG Shuzhou, LI Junling, WANG Dongmei. Determination of Lead and its Compounds in Workplace Air by GFAAS with Dynamic Tri-magnetic Field Zeeman Background Correction[J]. Journal of Environmental Hygiene, 2016, 6(6): 420-424. DOI: 10.13421/j.cnki.hjwsxzz.2016.06.008
    shu

    动态三磁场塞曼背景校正石墨炉原子吸收法测定工作场所空气中铅及其化合物

    Determination of Lead and its Compounds in Workplace Air by GFAAS with Dynamic Tri-magnetic Field Zeeman Background Correction

      摘要
    • 摘要:
      目的 建立动态三磁场塞曼背景校正石墨炉原子吸收法测定工作场所空气中铅及其化合物的分析方法。
      方法 用微孔滤膜采集空气样品，使用高氯酸-硝酸（1：9，V：V）消解，以1%硝酸定容至25 mL，在283.3 nm波长下，使用动态三磁场塞曼背景校正模式进行测定。
      结果 使用动态三磁场模式，同时得到2-磁场和3-磁场模式下的吸光值及校正曲线，在0~800 μg/L质量浓度范围内有较好的线性关系，其中0~100 μg/L浓度范围采用二磁场模式校正曲线，曲线方程为A=2.76×10-3C+2.08×10-2，r=0.9975，特征浓度1.58 μg/L；100 μg/L~800 μg/L浓度范围采用三磁场模式校正曲线，曲线方程A=（4.05×10-3+9.67×10-4C）/（1+6.50×10-4C），r=0.9970，特征浓度4.51 μg/L，方法最低检出浓度为2.6 μg/L，加标回收率为95.1%~104.8%，RSD为2.4%~4.5%。
      结论 本法操作简单，兼具两种磁场模式的优点，有效扩展了线性范围，准确灵敏，适用于不同浓度级别空气中铅及其化合物的同时测定。

       

      Abstract:
      Objective To establish an analytical method for the determination of lead and lead compounds in the air of workplace by GFAAS with dynamic tri-magnetic field Zeeman effect background correction.
      Methods Air sample was collected with microporous filter membrane, digested with perchloric acid+nitric acid (1:9, V:V), fixed the volume to 25 mL with 1% nitric acid and determined by GFAAS at wavelength 283.3 nm with a dynamic tri-magnetic field Zeeman effect background correction mode.
      Results Using a dynamic tri-magnetic field mode, the absorption value and calibration curve could be obtained both from bi-magnetic field mode and tri-magnetic field mode.There was a good linear relationship for the concentration of lead in the range of 0~800 μg/L by using a bi-magnetic field mode for 0~100 μg/L with a correlation equation of A=2.76×10-3C+2.08×10-3(r=0.9975) and a characteristic concentration of 1.58 μg/L; and using a tri-magnetic field mode for 100 μg/L~800 μg/L with a correlation equation of A=(4.05×10-3+9.67×10-4C)/(1+6.50×10-4C; r=0.9970) and a characteristic concentration of 4.51 μg/L.The minimum detectable concentration of this method was 2.6 μg/L.The recovery rate was 95.1%~104.8%, RSD was 2.4%~4.5%.
      Conclusion With the advantage of two kinds of magnetic field mode, the linear range could be effectively extended.This method was simple, accurate, sensitive and suitable for the determination of lead and lead compounds in the air for different concentration levels at the same time.

       

      • HTML全文
      • 参考文献(14)
      • 相关文章
      • 施引文献
    • 资源附件(0)

    /

    返回文章
    返回