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本文以 1 -苯基 -3 -甲基 -4 -苯甲酰基 -吡唑酮 -5( PMBP)为化学改进剂 ,提出低温蒸发金属 PMBP气态螯合物的 ETV-ICP-AES新技术。对影响螯合物的形成及其蒸发行为的因素进行了研究。在优化的实验条件下 ,方法测定镧、铕、铝和铁的检出限分别为 8.0 ng/m L、0 .9ng/m L、 0 .6 ng/m L和 3 .2 ng/m L;相对标准偏差分别为3 .3 %、3 .4%、4.7%和 3 .9%。已将本法用于标准参考机动车尾气尘粒和米粉试样中的痕量镧、铕、铝和铁的测定 ,结果与标准值吻合
In this paper, we proposed a new ETV-ICP-AES technique for vapor phase vapor deposition of metal chelates of PMBP by using PMBP as chemical modifier. Factors affecting the formation of chelates and their evaporation behavior were studied. The detection limits of lanthanum, europium, aluminum and iron were 8.0 ng / m L, 0.9 ng / m L, 0.6 ng / m L and 3.2 ng / m L, respectively, under the optimized experimental conditions The relative standard deviations were 3.3%, 3.4%, 4.7% and 3.9% respectively. This method has been used for the determination of traces of lanthanum, europium, aluminum and iron in standard reference motor vehicle exhaust dust and rice flour samples. The results are in agreement with the standard values