ICP-AES法检测汽油中微量有害金属元素的技术研究

Study on determination of harmful metal elements in gasoline by ICP-AES

将汽油用煤油稀释后,利用电感耦合等离子体发射光谱法,通过绘制标准曲线,采用有机进样的方法对汽油中含有的微量有害金属元素(Ni、P、Na、Mn、Mo、V、Ti、Zn、Pb、Sn、B、Ba、Cd、Ag、Al、Fe、Mg、Cr、Cu、Si、Hg、As)进行检测,并计算其相应元素的仪器检出限、方法检出限和方法定量限。同时,通过加标方法,评价该方法回收率。研究表明,该方法对涉及到的元素具有很好的适用性,各元素与其浓度有很好的线性相关性,且具有较低的检出限和定量限,各元素加标回收率基本在95%~104%之间,说明该方法有较高的准确度。

The concentration of harmful metal elements （Ni, P, Na, Mn, Mo, V, Ti, Zn, Pb, Sn, B, Ba, Cd, Ag, A1, Fe, Mg, Cr, Cu, Si, Hg and As） contained in gasoline was determined by ICP-AES after diluting the gasoline with kerosene. The detection limit, method limit and method limit of the corresponding elements were calculated. At the same time, the recoveries were evaluated by spiking method. The results show that the method has good appli- cability to the elements involved, the elements have a good linear correlation with the concentration, and the detec- tion limit and the limit of quantification are low. The recoveries of all the elements are well with the range of 95% -104%, which indicated that the method has high accuracy.