Abstract：A new method for simultaneous determination of iron(Ⅱ), copper(Ⅰ) and cobalt(Ⅱ) was established by second derivative peak area spectrophotometry in chromogenic system of 1,10-phenanthroline. The method could avoid disturbing by some ions. The accuracy and sensitivity were improved. There is a linear relationship in the range of 0.0-8.5 μg·mL-1 for Fe(Ⅱ); of 0.0-7.3 μg·mL-1 for Cu(Ⅰ); and of 0.0-5.9 μg·mL-1 for Co(Ⅱ). The method has been applied to simultaneous determination of iron(Ⅱ), copper(Ⅰ) and cobalt(Ⅱ) in aloe with satisfactory results. The average recovery is 98.6%-102% and the RSD is 0.1%-0.2%. There is no remarkable difference between these results and those of ICP-AES method.
Key words：Second derivative spectrum;Peak area spectrophotometry;Aloe;Iron;Copper;Cobalt;1;10-Phenanthroline
李红玫，苏丽红，陈瑞战 . 二阶导数光谱-峰面积积分法同时测定芦荟中痕量的铁、铜、钴[J]. 光谱学与光谱分析, 2004, 24(04): 463-465.
LI Hong-mei, SU Li-hong, CHEN Rui-zhan . Simultaneous Determination of Trace Amounts of Iron(Ⅱ), Copper(Ⅰ) and Cobalt(Ⅱ) in Aloe by Second Derivative Peak Area Spectrophotometry . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(04): 463-465.
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