Microwave Digestion of Hair Samples in Closed Vessels for the Determinations of Copper and Iron by Derivative Flame Atomic Absorption Spectrometry using Flow-injection Technique Chen Lanju, Zheng Lianyi, Sun Hanwen (Hebei University of Science and Techology, Shijianzhuang 050018 Hebei University, Baoding 071002) Abstract A new method was presented for the determinations of copper and iron in hair samples，which was based on the technique of microwave digestion in closed vessels，flow-injection and derivative flame atomic absorption spectrometry. The technique of microwave digestion is convenient, little of pollution, less in loss, and complete digestion. The flaws that sampling is large and matrix interference is serious in conventional flame atomic absorption spectrometry(FAAS) were overcome by flow-injection sampling technique. The sensitivity and signal selectivity were enhanced when derivative technique was used. This new method that derivative flame atomic absorption spectrometry combined with microwave digestion and flow-injection technique is simple and rapid with satisfactory results for determination of copper and iron in hair． Key words Derivative atomic absorption spectrometry, Flow-injection, Microwave digestion, Hair, Copper, Iron 微波溶样-流动注射-导数火焰原子吸收光谱测定人发中的铜和铁 陈兰菊 郑连义 孙汉文# (河北科技大学 石家庄 050018 #河北大学 保定 071002) 摘要 本文以微波消解人发样，利用流动注射-导数火焰原子吸收法测定其中微量铜、铁的含量。微波溶样技术具有快捷、污染小、损失少、消化完全等优点；流动注射进样技术可以克服常规火焰原子吸收法耗样量大和基体干扰严重的缺点；导数技术应用于火焰原子吸收可提高方法的灵敏度和信号的选择性。微波溶样、流动注射与导数技术相结合应用于火焰原子吸收成功地测定了人发中的微量铜和铁。 关键词 微波消解 流动注射 导数火焰原子吸收 铜 铁 陈兰菊 女，29岁，讲师，硕士，从事原子吸收方面的研究。 E-mail:lanju_chen@sina.com 2002-01-07收稿，2002-04-01修回 (PDF全文下载c02080)