电感耦合等离子体原子发射光谱法测定废气中的铅方法研究

Research on Determination of Plumbum in Exhaust Gas by Inductively Coupled Plasma Atomic Emission Spectrometry

以石英纤维滤筒采样，采用硝酸一氢氟酸消解体系，建立了电感槌合等离子体原子发射光谱法测定废气中铅分析方法。研究了仪器工作条件、方法的干扰和消除因素，探讨了空白实验对分析结果的影响；在选定的最优条件下。铅标准曲线的线性相关系数为0．9999；检出限为0．010mg／L；平均相对标准偏差为2．8％；加标回收率为97．8％～104％。与国家标准方法相比，本方法准确可靠，检测限更低，灵敏度更高，线性范围更宽，可用于废气中铅的含量测定。

In this article, quartz fiber filter tube for sampling and nitric acid - hydrofluoric acid digestion system were used to develop the method for the determination of Plumbum in exhaust gas by inductively coupled plasma atomic emission spectrome- try. The working conditions of the instrument and interference and elimination factors of the method were studied, and the effect of blank test on analytical results was examined. Under the selected optimal conditions, the linear correlation coefficient of Plumbum was 0.999 9 ,the detection limit was 0. 010 mg/L, the average relative standard deviation was 2.8% , recoveries ranged from 97.8% ～ 104%. Compared with the national standard method, the method was accurate and reliable, further- more, the method had the lower detection limit, higher sensitivity and wder linear range. Obviously, it could be used for the determination of Plumbum in exhaust gas.