Highly Sensitive Determination of Iron Ions in Water With Bromopyrogallol Red by Light Absorption Ratio Variation Spectrophotometry
Highly Sensitive Determination of Iron Ions in Water With Bromopyrogallol Red by Light Absorption Ratio Variation Spectrophotometry
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DOI：
10.1080/10739140902735639
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发表时间：
2009-02
影响因子：
1.6
通讯作者：
Yiting Tang;Yuan Yuan-Yuan;Xing Chen;Qing Zhu;H. Gong;Hongwen Gao
中科院分区：
文献类型：
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作者：
Yiting Tang;Yuan Yuan-Yuan;Xing Chen;Qing Zhu;H. Gong;Hongwen Gao
摘要铁离子（Ⅱ，Ⅲ）与溴邻苯三酚红（BPR）的络合反应在pH 6.23时是灵敏的，铁与BPR的组成比为1：2，在F-和硫脲存在下，它是选择性的。利用该反应，将光吸收比变化法应用于铁离子的直接测定。检测限仅为4.5 μg/L Fe。测定了长江、太湖、自来水和上海黄浦江中的铁离子含量，回收率在95.5%~ 106%之间。
Abstract The complexation between Fe ions (II, III) and bromopyrogallol red (BPR) is sensitive at pH 6.23 with the composition ratio at 1:2 of Fe to BPR, and it is selective in the presence of F− and thiocarbamide. Using this reaction, the light absorption ratio variation approach was applied to the direct determination of Fe ions. The limit of detection is only 4.5 µg/L Fe. The Fe ions content existing in the Yangtze River, Taihu Lake, tap water and Huangpu River in Shanghai was determined with the recovery rate between 95.5 and 106%.