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当前位置: 首页 > 文章 > 苏丹红Ⅰ褪色分光光度法测定环境水体中六价铬 湖北农业科学 2013,52 (3) 184-186
Position: Home > Articles > Determination of Chromium(Ⅵ) in Environment Samples with Sudan Ⅰby the Fading Spectrophotometric Hubei Agricultural Sciences 2013,52 (3) 184-186

苏丹红Ⅰ褪色分光光度法测定环境水体中六价铬

作  者：
沙鸥;李亚鑫;周妘;张思亮
单  位：
淮海工学院化学工程学院
关键词：
苏丹红Ⅰ;六价铬;分光光度法
摘  要：
在盐酸介质中,依据六价铬离子(Cr(Ⅵ))氧化苏丹红Ⅰ使其褪色的原理提出了测定Cr(Ⅵ)离子的新方法,确定了最优的测定条件。在485 nm处,Cr(Ⅵ)离子在0.2～2.6μg/mL范围内符合比尔定律,线性回归方程为A=0.207 0C+0.002 35,相关系数为0.996 0,表观摩尔吸光系数为6.09×104L/(cm.mol)。该方法可用于水样中的微量Cr(Ⅵ)离子的测定,回收率为97.1%～100.3%,RSD小于3.0%。
译  名：
Determination of Chromium(Ⅵ) in Environment Samples with Sudan Ⅰby the Fading Spectrophotometric
作  者：
SHA Ou1,2,LI Ya-xin1,ZHOU Yun1,ZHANG Si-liang1(1.School of Chemical Engineering,Huaihai Institute of Technology,Lianyungang 222005,Jiangsu,China;2.Analysis and Test Center of Jiangsu Marine Resources Development Research Institute,Lianyungang 222001,Jiangsu,China)
关键词：
Sudan Ⅰ;Chromium(Ⅵ);spectrophotometric method
摘  要：
A new spectrophotometric method for the determination of micro-amounts of Chromium(VI) was proposed based on the oxidation of Sudan Ⅰ by Chromium(Ⅵ) in hydrochloric acid medium.The optimal conditions were studied.The maximum absorption of Sudan Ⅰ was at 485 nm.The decrease of absorbance of Sudan Ⅰ resulted from its oxidation by Chromium(Ⅵ),and the linear relationship was established between the decrease of absorbance and Chromium(Ⅵ) concentration of 0.2～2.6 μg/mL.The equation of linear regression was A=0.207 0 C+0.002 35,coefficient of correlation was 0.996 0,apparent molar absorption coefficient was 6.09×104L/cm.mol.The proposed method had been applied to oletermine Chromium(VI) in water samples,and the recovery rate was 97.1%～100.3% and the RSD was less than 3.0%.

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