期刊论文

中文

微量元素与健康研究

1005-5320

2005

22

1

44-45

10.3969/j.issn.1005-5320.2005.01.021

本校为第一机构

实验发现Fe3+对硫酸介质中过硫酸铵氧化邻甲氧基酚的反应具有明显的催化作用,对反应性能和条件进行了研究,并由此建立了一种测定水中痕量Fe3+的新催化光度法.该方法具有准确度和灵敏度高, 选择性好、操作简便等特点.实验测定Fe3+浓度在0.002～0.6 μg/25 ml范围内呈良好线性关系,方法检出限为7.52×10-10g/ml,应用于几种环境水样中Fe3+的含量测定,RSD小于4.85%,样品加标回收率为98.1%～106.1%.

A new catalytic spectrophotometry for the determination of trace iron was established.The method is based on the hyperchrome of o-methoxyphnol oxidized by ammonium persulfate under the catalysis of trace iron in H 2SO 4 medium.This method showed a high sensitivity and accuracy , good selectivity and operating simplicity, a detection limit of 7.52×10 -10g/ml for Fe 3+and a linear relation within the range of 0.002～0.6μg/25ml Fe 3+, This method has been applied to detect trace iron in several environment water samples with satisfactory resules...