Inhibitory Fluorophotometric Determination of Trace Amount of Mercury in Simulated Wastewater
摘 要
基于在pH8.00磷酸氢二钠-柠檬酸缓冲介质中,血红蛋白对过氧化氢氧化对甲酚反应具有强的催化作用,汞(Ⅱ)对上述指示反应具有灵敏的抑制作用,从而提出了抑制荧光光谱法测定模拟废水中汞含量的方法。优化的试验条件如下:① 血红蛋白的浓度为2.00×10-7mol·L-1;② 对甲酚的浓度为1.60×10-3mol·L-1;③ 过氧化氢的浓度为1.11×10-3mol·L-1;④ 反应时间为80 min。在激发波长318 nm、发射波长405 nm处,反应体系的ΔF(即F0与F值之差)与汞(Ⅱ)的浓度在2.00×10-8~1.00×10-5mol·L-1范围内呈线性关系。方法用于模拟废水的分析,测得加标回收率在94.0%~105%之间,相对标准偏差(n=8)在2.5%~3.3%之间。
Abstract
It was found that in Na2HPO4-citric acid buffer medium of pH 8.00, the oxidation of p-cresol by hydrogen peroxide was strongly catalyzed by haemoglobin (Hb), leading to an enhancement of fluorescence. The indicator reaction was inhibited by the presence of Hg(Ⅱ). Based on these facts, the determination of trace amount of Hg(Ⅱ) in simulated wastewater by inhibitory spectrofluorimetry was proposed. The optimized conditions found were as follows: ① concentration of Hb: 2.00×10-7mol·L-1; ② concentration of p-cresol: 1.60×10-3mol·L-1; ③ concentration of H2O2: 1.11×10-3mol·L-1; ④ time of reaction: 80 min. Linear relationship was found between values of ΔF(F0-F) determined at wavelengths of 318 nm (λex) and 405 nm (λem) and concentration of Hg(Ⅱ) in the range of 2.00×10-8-1.00×10-5mol·L-1. The proposed method was used in the analysis of simulated wastewater, giving values of recovery and RSD′s (n=8) in the ranges of 94.0%-105% and 2.5%-3.3%.
中图分类号 O657.3
所属栏目
基金项目 国家自然科学基金(NO.20973087)
收稿日期 2011/1/8
修改稿日期
网络出版日期
作者单位点击查看
备注李晓燕(1960-),女,四川乐山人,教授,主要从事生物活性物质及环境物质分析研究。
引用该论文: LI Xiao-yan,ZHANG Yuan-qin,HU Yu,CHENG Si-qing. Inhibitory Fluorophotometric Determination of Trace Amount of Mercury in Simulated Wastewater[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2012, 48(2): 207~209
李晓燕,张元勤,胡育,程四清. 抑制荧光光谱法测定模拟废水中痕量汞[J]. 理化检验-化学分册, 2012, 48(2): 207~209
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】李咏梅,李人宇,张龙,等.Hg2+-碘化物-吖啶橙-聚乙烯醇缔合体系褪色光度法测定痕量汞[J].冶金分析, 2010,30(5):61-64.
【2】HE Xiao-ling, WANG Yong-qiu, LING Ke-qing. Synthesis of a novel bistriazene reagent 4,4′-bis[3-(4-phenylthiazol-2-yl)triazenyl]biphenyl and its highly sensitive color reaction with mercury(Ⅱ)[J]. Talanta, 2007,72:747-754.
【3】孙旭辉,马军,李小华,等.光度法直接测定水溶液中微量汞的分析方法研究[J].工业水处理, 2008,28(12):73-76.
【4】金岚.冷原子吸收光谱法直接测定尿汞[J].理化检验-化学分册, 2008,44(10):1002-1003.
【5】MARTINIS E M, BERTN P, OLSINA R A, et al. Trace mercury determination in drinking and natural water samples by room temperature ionic liquid based-preconcentration and flow injection-cold vapor atomicabsorption spectrometry[J]. Journal of Hazardous Materials, 2009,167:475-481.
【6】CHEN Hai-ting, CHEN Jian-guo, JIN Xian-zhong, et al. Determination of trace mercury species by high performance liquid chromatography-inductively coupled plasma mass spectrometry after cloud point extraction[J]. Journal of Hazardous Materials, 2009,172:1282-1287.(下转第212页)
【7】VESELOVA I A, SHEKHOVTSOVA T N. Visual determination of mercury(Ⅱ) using horseradish peroxidase immobilized on polyurethane foam[J]. Anal Chim Acta, 1999,392:151-158.
【8】李囡,姜子涛,李荣.辣根过氧化物酶催化动力学光度法测定汞[J].光谱实验室, 2006,23(6):1311-1313.
【9】王全林,刘志洪,蔡汝秀,等.血红蛋白的过氧化物酶催化特性研究[J].化学学报, 2003,61(1):34-39.
【10】WANG Rui-yong, LIU Zhi-hong, CAI Ru-xiu, et al. A new spectrofluorometric method for the determination of ascorbic acid based on its activating effect on a hemoglobin-catalyzed reaction[J]. Analytical Sciences, 2002,18:977-980.
【11】李晓燕,宋九华,胡苗.荧光光度法测定痕量色氨酸——基于其对一甲酚荧光反应的增强作用[J].理化检验-化学分册, 2008,44(10):1005-1006.
【12】张爽,汪涛,Fatima,等.汞(Ⅱ)与牛血红蛋白相互作用研究[J].化学研究与应用, 2007,19(6):611-614.
【2】HE Xiao-ling, WANG Yong-qiu, LING Ke-qing. Synthesis of a novel bistriazene reagent 4,4′-bis[3-(4-phenylthiazol-2-yl)triazenyl]biphenyl and its highly sensitive color reaction with mercury(Ⅱ)[J]. Talanta, 2007,72:747-754.
【3】孙旭辉,马军,李小华,等.光度法直接测定水溶液中微量汞的分析方法研究[J].工业水处理, 2008,28(12):73-76.
【4】金岚.冷原子吸收光谱法直接测定尿汞[J].理化检验-化学分册, 2008,44(10):1002-1003.
【5】MARTINIS E M, BERTN P, OLSINA R A, et al. Trace mercury determination in drinking and natural water samples by room temperature ionic liquid based-preconcentration and flow injection-cold vapor atomicabsorption spectrometry[J]. Journal of Hazardous Materials, 2009,167:475-481.
【6】CHEN Hai-ting, CHEN Jian-guo, JIN Xian-zhong, et al. Determination of trace mercury species by high performance liquid chromatography-inductively coupled plasma mass spectrometry after cloud point extraction[J]. Journal of Hazardous Materials, 2009,172:1282-1287.(下转第212页)
【7】VESELOVA I A, SHEKHOVTSOVA T N. Visual determination of mercury(Ⅱ) using horseradish peroxidase immobilized on polyurethane foam[J]. Anal Chim Acta, 1999,392:151-158.
【8】李囡,姜子涛,李荣.辣根过氧化物酶催化动力学光度法测定汞[J].光谱实验室, 2006,23(6):1311-1313.
【9】王全林,刘志洪,蔡汝秀,等.血红蛋白的过氧化物酶催化特性研究[J].化学学报, 2003,61(1):34-39.
【10】WANG Rui-yong, LIU Zhi-hong, CAI Ru-xiu, et al. A new spectrofluorometric method for the determination of ascorbic acid based on its activating effect on a hemoglobin-catalyzed reaction[J]. Analytical Sciences, 2002,18:977-980.
【11】李晓燕,宋九华,胡苗.荧光光度法测定痕量色氨酸——基于其对一甲酚荧光反应的增强作用[J].理化检验-化学分册, 2008,44(10):1005-1006.
【12】张爽,汪涛,Fatima,等.汞(Ⅱ)与牛血红蛋白相互作用研究[J].化学研究与应用, 2007,19(6):611-614.
相关信息