高等学校化学学报

高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (4): 459.

• 论文 • 上一篇    下一篇

速差动力学分析法同时测定铬铁离子的研究

陈烨璞1, 张君1, 彭红宇1, 姚飚2, 李培之2   

  1. 1. 无锡轻工业学院纺织分院, 无锡, 214064;
    2. 江南大学化学系, 无锡
  • 收稿日期:1991-01-24 出版日期:1992-04-24 发布日期:1992-04-24
  • 通讯作者: 陈烨璞

Differential Speed Spectrophotometric Determination of Fe and Cr Ions in Sewage with Xylenol Orange

CHEN Ye-pu1, ZHANG Jun1, PENG Hong-yu1, YAO Biao2, LI Pei-zhi2   

  1. Textile Branch of Wuxi Light Industry Institute, Wuxi, 214064
  • Received:1991-01-24 Online:1992-04-24 Published:1992-04-24

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被引次数

6

摘要： 速差动力学分析是利用2种性质不同的离子与显色剂反应速度不同进行测定的分析方法[1,2].目前各种废水中Fe(Ⅲ)、Cr(Ⅲ)共存的情况较为多见,测定时互有干扰.二甲酚橙与Fe3+、Cr3+作用形成的2种配合物具有相似的吸光特性,但生成速率有显著差异.铁与二甲酚橙在室温下反应迅速,而且随温度升高其吸光度几乎不变,而铬与二甲酚橙在室温下几乎不发生反应,加热才有明显反应.据此本文同时测定了铬、铁混合物.该方法快速简便,最低检出限0.1μg/mL,回收率95%～106%.利用本法可监测印染废水中的铬、铁离子.

关键词: 二甲酚橙, 铬(Ⅲ), 铁(Ⅲ), 速差动力学

Abstract: The present paper contains the A～t kinetics activity that exhibits in the process of reaction of Cr(Ⅲ) and Fe(Ⅲ) ions with XOand other colorants.Two complex compounds derived from the reaction of Fe (Ⅲ) and Cr (Ⅲ) with xylenol orange and other colorants have similar light absorbance but their speeds of reaction are obviously different while the repeatability of their A～t curves is satisfactory accordingly, a new differential speed kinetics analysis has been devel-opped, with which the bimixtrue of Fe(Ⅲ) and Cr(Ⅲ) was determined simultaneously.The result is satisfactory when it is used in the determination of sample sewage.Linearity 0～0.25 mg/ mL, recovery 95%～106% and detection limit 0.1μg/mL.

Key words: Xylenol orange, Cr(Ⅲ), Fe(Ⅲ), Differential speed kinetics

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