Study on the Electrochemical Behaviors of Phenol and Three Isomers of Dihydroxybenzene at the MWCNTs Modified GCE and CV Determination of Total Phenols in Water Samples
摘 要
移取1.00×10-3mol·L-1的苯酚、对苯二酚、邻苯二酚和间苯二酚标准溶液各5.00 mL,分别置于4支比色管中,各加pH 5.0的柠檬酸-柠檬酸钠缓冲溶液3.00 mL,用水定容至10 mL,采用多壁碳纳米管修饰的玻碳电极为工作电极,以0.25 V·s-1速率扫描获得循环伏安曲线。结果发现:0.225,0.333,0.727 V处的氧化峰电流的加和与总酚浓度在0.5~2 000 μmol·L-1内呈线性关系,检出限(3S/N)为0.15 μmol·L-1。方法用于测定环境水样中总酚含量,加标回收率在95.0%~105%之间,测定值的相对标准偏差(n=6)小于6.0%。
Abstract
Aliquots of 5.00 mL of standard solution of 1.00×10-3mol·L-1 phenol, hydroquinone, catechol and resorcinol were taken and placed separately in 4 colorimetric tubes. Portions of 3.00 mL of citric acid-sodium citrate buffer solution (pH 5.0) were added to each of the tubes and the volume of the mixture were made up to 10 mL with water. Cyclic voltammetry curves of the 4 solutions were taken at a scanning rate of 0.25 V·s-1, using a multi-walled carbon nanotube modified glassy carbon electrode as working electrode. It was shown that linear relationship was kept between the sum of oxidation peak currents, at 0.225, 0.333, and 0.727 V, and the concentration of total phenols in the range of 0.5-2 000 μmol·L-1, with detection limit (3S/N) of 0.15 μmol·L-1. The method was used to determine total phenols in environmental water samples, and recovery was tested by standard addition method, giving values of recovery in the range of 95.0%-105%, and RSDs (n=6) less than 6.0%.
中图分类号 O657.1 DOI 10.11973/lhjy-hx201809006
所属栏目 工作简报
基金项目 国家自然科学基金项目(21475113);陕西省科技计划项目(2012JQ2013);陕西省软科学研究计划项目(2015KRM164);咸阳师范学院“青蓝人才”项目(XSYQL201507);陕西省大学生创新创业训练计划项目(201828006)
收稿日期 2017/10/18
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备注尚永辉,博士,副教授,主要从事药物分析与化学计量学研究,shangyonghui@163.com
引用该论文: SHANG Yonghui,WANG Dailin,PENG Yiting,PAN Lele,SUN Xiaomei. Study on the Electrochemical Behaviors of Phenol and Three Isomers of Dihydroxybenzene at the MWCNTs Modified GCE and CV Determination of Total Phenols in Water Samples[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2018, 54(9): 1020~1024
尚永辉,王黛琳,彭怡婷,潘乐乐,孙晓梅. 苯酚及3种苯二酚异构体在多壁碳纳米管修饰玻碳电极上的电化学行为研究及循环伏安法测定水样中总酚含量[J]. 理化检验-化学分册, 2018, 54(9): 1020~1024
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参考文献
【1】王清云,佟永纯,徐新建,等.Sn4+/TiO2光催化降解邻硝基苯酚的试验与理论研究[J].环境科学与技术, 2015,38(5):21-24.
【2】郑龙珍,董泽民,熊乐艳,等.WC/TiO2纳米复合界面光催化剂制备及其光催化降解酚类污染物研究[J].环境科学学报, 2014,34(11):2806-2814.
【3】王勇,张闪,董莹,等.水体中邻苯二酚和对苯二酚检测方法的研究进展[J].化学研究, 2015,26(1):100-104.
【4】周文敏,傅德黔,孙宗光.中国水中优先控制污染物黑名单的确定[J].环境科学研究, 1991,4(6):9-12.
【5】张群,占峰,开小明.双波长线性回归光度法同时测定苯酚和间苯二酚[J].光谱学与光谱分析, 2006,26(11):2110-2112.
【6】闫琰,叶芝祥,闫军,等.紫外光谱法同时测定水中苯酚、邻苯二酚和间苯二酚[J].化学分析计量, 2008,17(2):22-24.
【7】额日和木,王旭,张煜琳,等.高效液相色谱法测定苯、苯酚、对苯醌、苯二酚和苯三酚[J].分析仪器, 2014(3):34-39.
【8】曾凡蓉,席永清,张淑青,等.荧光光度法测定环境水样中的苯酚和对苯二酚[J].分析试验室, 2007,26(5):76-79.
【9】ZHANG H, ZHAO J, LIU H. Electrochemical determination of diphenols and their mixtures at the multiwall carbon nanotubes/poly (3-methylthiophene) modified glassy carbon electrode[J]. Microchimica Acta, 2010,169(3/4):277-282.
【10】王卫星,朱宇,崔艳萍,等.碳纳米管修饰电极对苯二酚三种异构体的研究[J].环境科学与技术, 2013,36(4):74-79.
【11】FENG S Q, ZHANG Y Y, ZHONG Y M, et al. Simultaneous determination of hydroquinone and catechol using covalent layerby-layer self-assembly of carboxylated-MWNTs[J]. Journal of Electroanalytical Chemistry, 2014,733:1-5.
【2】郑龙珍,董泽民,熊乐艳,等.WC/TiO2纳米复合界面光催化剂制备及其光催化降解酚类污染物研究[J].环境科学学报, 2014,34(11):2806-2814.
【3】王勇,张闪,董莹,等.水体中邻苯二酚和对苯二酚检测方法的研究进展[J].化学研究, 2015,26(1):100-104.
【4】周文敏,傅德黔,孙宗光.中国水中优先控制污染物黑名单的确定[J].环境科学研究, 1991,4(6):9-12.
【5】张群,占峰,开小明.双波长线性回归光度法同时测定苯酚和间苯二酚[J].光谱学与光谱分析, 2006,26(11):2110-2112.
【6】闫琰,叶芝祥,闫军,等.紫外光谱法同时测定水中苯酚、邻苯二酚和间苯二酚[J].化学分析计量, 2008,17(2):22-24.
【7】额日和木,王旭,张煜琳,等.高效液相色谱法测定苯、苯酚、对苯醌、苯二酚和苯三酚[J].分析仪器, 2014(3):34-39.
【8】曾凡蓉,席永清,张淑青,等.荧光光度法测定环境水样中的苯酚和对苯二酚[J].分析试验室, 2007,26(5):76-79.
【9】ZHANG H, ZHAO J, LIU H. Electrochemical determination of diphenols and their mixtures at the multiwall carbon nanotubes/poly (3-methylthiophene) modified glassy carbon electrode[J]. Microchimica Acta, 2010,169(3/4):277-282.
【10】王卫星,朱宇,崔艳萍,等.碳纳米管修饰电极对苯二酚三种异构体的研究[J].环境科学与技术, 2013,36(4):74-79.
【11】FENG S Q, ZHANG Y Y, ZHONG Y M, et al. Simultaneous determination of hydroquinone and catechol using covalent layerby-layer self-assembly of carboxylated-MWNTs[J]. Journal of Electroanalytical Chemistry, 2014,733:1-5.
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