全热解石墨管石墨炉原子吸收法测定痕量锶

Determination of Trace Strontium by Graphite Furnace Atomic Absorption Spectrometry with All-Pyrolytic Graphite Tube

摘要: 研究了热解涂层和全热解石墨管中Sr的原子吸收信号形状和原子化行为,讨论了CaCl_2、FeCl_3和HClO_4,抑制Sr吸收信号的原因。采用EDTA铵盐作基体改进剂,全热解石墨管石墨炉原子吸收法直接测定河泥中痕量Sr,方法的特征量为6.9pg/0.0044A。

Abstract: The shape of absorption signal and atomization behavior of strontium inpyrolyticlly coated and all-pyrolytic graphite tubes were studied. The reason why CaCl2, FeCl3 and HC1O4 suppress the absorption signal was discussed. A method for direct determination