同位镀铋丝网印刷电极快速检测水中铅、镉离子
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摘要
针对水体中生物毒性显著的重金属离子,本文采用丝网印刷电极三电极系统,通过同位镀铋膜阳极溶出伏安法,对水体中铅、镉两种重金属离子实现快速准确定量。结果表明:铅、镉离子在铋膜电极上可以得到灵敏的溶出峰,且铅离子与镉离子的溶出峰面积在0.1 mg/L～0.7 mg/L的浓度范围内呈现良好的线性关系,线性相关系数分别为0.9932、0.9917,检出限分别达0.034 mg/L、0.028 mg/L,样品加标回收率分别为102.51%与91.07%。基于共存离子的干扰特性,重点筛选典型干扰离子,分别研究了氧化性离子与共镀"合金"离子对铅、镉两种金属离子检测稳定性的影响。本方法简单、快速、准确,为突发重金属环境污染事件现场,提供一种可靠的分析方法。
A fast,accurate,quantitative method for detecting lead and cadmium,significant bio-toxicity ions towards organisms,in water was established with in-situ bismuth coated screen printed electrode based on three-electrode anodic stripping voltammetry system.The results indicated that lead and cadmium ions on the bismuth membrane electrode yield well defined peaks; and a good linear relationship between the peak areas and the concentration was obtained in the range from 0.1 mg/L to 0.7 mg/L with the correlation coefficients 0.9932 and 0.9917,respectively; the limits of detection were 0.034 mg/L and 0.028 mg/L for lead and cadmium ions,respectively.The Bi film electrode was used for analysis of simulation sample with the spiked recoveries from 91.07% to 102.51%.Two sorts of typical coexisting interference ions were screened based on the electrochemical behavior of oxidizing ion and co-plated alloy ions to evaluate the influence on the detection stability of lead and cadmium ions.This method is simple,fast and accurate,which would provide a reliable on-site analysis process for emergency heavy metal pollution events.
A fast,accurate,quantitative method for detecting lead and cadmium,significant bio-toxicity ions towards organisms,in water was established with in-situ bismuth coated screen printed electrode based on three-electrode anodic stripping voltammetry system.The results indicated that lead and cadmium ions on the bismuth membrane electrode yield well defined peaks; and a good linear relationship between the peak areas and the concentration was obtained in the range from 0.1 mg/L to 0.7 mg/L with the correlation coefficients 0.9932 and 0.9917,respectively; the limits of detection were 0.034 mg/L and 0.028 mg/L for lead and cadmium ions,respectively.The Bi film electrode was used for analysis of simulation sample with the spiked recoveries from 91.07% to 102.51%.Two sorts of typical coexisting interference ions were screened based on the electrochemical behavior of oxidizing ion and co-plated alloy ions to evaluate the influence on the detection stability of lead and cadmium ions.This method is simple,fast and accurate,which would provide a reliable on-site analysis process for emergency heavy metal pollution events.
引文
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[15] 郭伟强,张培敏,边平凤.分析化学手册基础知识与安全知识[M].3版.北京:化学工业出版社,2016: 893.
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[18] 王静,贺鹏,孙海林.同位镀汞膜电极同时测定水中的铅和镉[J].中国环保产业,2015(6):39-42.
[19] 王娜,董献堆.新型铋膜电极溶出伏安法测定痕量重金属元素[J].东北师大学报(自然科学),2008,40(3):93-96.
[20] 尹丽君.复合锑膜修饰铜电极溶出伏安法测定水中痕量镉、铅[J].中国科学技术大学学报,2011,41(6):550-555.
[21] 傅献彩,沈文霞,姚天扬.物理化学下册[M].5版.北京:高等教育出版社,2005:485-486.
[2] 李银保,彭湘君,张道英.沉淀富集-火焰原子吸收光谱法测定水中的铅和镉[J].光谱实验室,2009,26( 3):599-601.
[3] 时亮,隋欣.电感耦合等离子体-原子发射光谱法的应用[J].化工技术与开发,2013,42(5): 17-21.
[4] 刘晨光.应用电感耦合等离子体质谱法检测地表水中铅元素的含量[J].辽宁化工,2011,40(11):1217-1219.
[5] 尹丽君.合金层过渡铋膜与锑膜电极的制备及其分析应用[D].合肥:中国科学技术大学,2011.
[6] 霍东兴,梁精龙,李慧.电化学分析技术在金属电沉积研究中应用[J].铸造技术,2016,37(12):2780-2782.
[7] 范清杰,杜国荣,涂家润.方波阳极溶出伏安法同时测定溶液中Cd(Ⅱ)、Pb(Ⅱ)、Cu(Ⅱ)、Bi(Ⅲ)离子的多元校正方法[J].天津大学学报(自然科学与工程技术版),2013,46(2):145-149.
[8] Rico M,Olivares-Marin M,Gil E.A novel cell design for the improved stripping voltammetric detection of Zn(II) ,Cd(II),and Pb (II) on commercial screen-printed strips by bismuth codeposition in stirred solutions[J].Electroanalysis,2008,20( 24):2608-2613.
[9] Arduini F,Calvo J,Amine A.Bismuth-modified electrodes for lead detection[J].Trac-Trends in Analytical Chemistry,2010,29 ( 11SI):1295-1304.
[10] Wang J,Lu J,Hocevar S.Bismuth-coated carbon electrodes for anodic stripping voltammetry[J].Analytical Chemistry,2000,72 ( 14) : 3218-3222.
[11] 李建平,彭图治,张雪君.铋膜电极电位溶出法测定痕量铅、镉、锌[J].分析化学,2002,30(9):1092-1095.
[12] 吴志珊,宋伟,韩倩.铋膜丝网印刷电极现场快速测定工业废水中Pb2+、Cd2+[J].环境化学,2013,32(4):692-697.
[13] 王金黎,翁忠良.铋膜丝网印刷电极快速检测日用陶瓷铅、镉溶出量[J].科学技术创新,2015(34):139-140.
[14] 王兴磊,闫秀玲,何晓燕.阳极溶出方波伏安法测定水体中的铅离子[J].伊犁师范学院学报,2015(4):39-43.
[15] 郭伟强,张培敏,边平凤.分析化学手册基础知识与安全知识[M].3版.北京:化学工业出版社,2016: 893.
[16] 何艳贞,王运祥.用新方法研究钨、钼、铬酸盐难溶物性质[J].有色金属工程,1983(3):61-64.
[17] 郭伟强,张培敏,边平凤.分析化学手册基础知识与安全知识[M].3版.北京:化学工业出版社,2016: 160.
[18] 王静,贺鹏,孙海林.同位镀汞膜电极同时测定水中的铅和镉[J].中国环保产业,2015(6):39-42.
[19] 王娜,董献堆.新型铋膜电极溶出伏安法测定痕量重金属元素[J].东北师大学报(自然科学),2008,40(3):93-96.
[20] 尹丽君.复合锑膜修饰铜电极溶出伏安法测定水中痕量镉、铅[J].中国科学技术大学学报,2011,41(6):550-555.
[21] 傅献彩,沈文霞,姚天扬.物理化学下册[M].5版.北京:高等教育出版社,2005:485-486.
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