增感效应导数火焰原子吸收光谱测定金属铜和铜合金中的微量铬  

Determination of Trace Chromium in Copper and Copper -alloy by Enhancing Effect Flame Atomic Absorption Spectrometry With Derivative Technique

作　　者：孙汉文[1] 陈兰菊[1] 杨莉丽[1] 孙建民[1] 张德强[1] 

机构地区：[1]河北大学化学系,保定071002

出　　处：《分析化学》1998年第4期410-413,共4页Chinese Journal of Analytical Chemistry

摘　　要：提出了增感效应导数火焰原子吸收光谱测定金属铜和铜合金中微量铬的新方法。研究了表面活性剂十二烷基硫酸钠（ＳＤＳ）对铬的增感效果。导数技术与增感效应相结合可使火焰原子吸收光谱的灵敏度提高６８倍。本法测定金属铜和铜合金中的微量铬取得了满意效果。A new method for the determination of trace chromium in copper and copper alloy by enhancing effect-flame atomic absorption spectrometry with derivative technique is pro- posed. The enhaning effect of sodium dodectyl sulfate on chromium was investigated. The sensitivity for the determination of chromium was enhanced 68 times than that of convention- al flame atomic absorption spectrometry. The detection limit of this method is 0. 0076 mg/L. The method has been applied to the determination of Cr in the samples with satisfactory re- sults.

关 键 词：增感效应 导数 火焰原子吸收 测定 铜合金 铬 

分 类 号：TG146.11[一般工业技术—材料科学与工程]