Application of functional gold nanoparticles on the determination of copper ion in water
MA Wanchao1, QU Yingjuan*2, SONG Limei2, ZHU Gang2
1. Key Laboratory of Mine Geological Hazards Mechanism and Control, MNR, Xi'an 710054,China; 2. School of Chemical Engineering, Xi'an University, Xi'an 710065,China
Abstract：Copper is an essential trace element for human body, but its amount should be strictly controlled. The establishment of determination method for copper in water is of great importance. Gold nanoparticles (AuNPs) with average diameter of about 15 nm were synthesized by reducing HAuCl4 with sodium citrate.AuNPs were modified with mercaptopropionic acid and chitosan to prepare functional mercaptopropionic acid/chitosan-AuNPs. Under weakly acidic conditions, the mercaptopropionic acid and chitosan modified AuNPs could be aggregated in the presence of Cu2+, leading to the change of solution color. Cu2+ standard solution was added into mercaptopropionic acid/chitosan-AuNPs solution. The absorbance was measured by spectrophotometry at 539 nm after 10 min, which was applied for the determination of Cu2+ in water. The results showed that the absorbance at 539 nm had a linear relationship with the concentration of Cu2+ in range of 2.0×10-8-3.0×10-7 mol/L. The linear correlation coefficient of calibration curve was 0.996 6. The apparent molar absorptivity was about 1.0×107 L·mol-1·cm-1. The limit of detection was 1×10-8 mol/L. The proposed method was applied for the determination of Cu2+ in lake water. The relative standard deviation (RSD, n=5) of determination results was 2.7%. The recoveries were between 97% and 106%.
马万超, 屈颖娟, 宋立美, 朱刚. 功能化纳米金在测定水中铜离子中的应用[J]. 冶金分析, 2023, 43(4): 72-76.
MA Wanchao, QU Yingjuan, SONG Limei, ZHU Gang. Application of functional gold nanoparticles on the determination of copper ion in water. , 2023, 43(4): 72-76.
[1] 黄运瑞,张廉奉,卢驰元,等.分散液相微萃取光度法测定水中痕量铜[J].冶金分析,2016,36(12):65-68. HUANG Yunrui,ZHANG Lianfeng,LU Chiyuan,et al.Determination of trace copper in water by dispersive liquid phase microextraction combined with spectrophotometry[J].Metallurgical Analysis,2016,36(12):65-68. [2] 孙亚兰,蔡伊娜,任冰雪,等.基于铜/银纳米簇检测铜离子的方法研究[J].分析测试学报,2020,39(2):227-232. SUN Yalan,CAI Yina,REN Bingxue,et al.Detection of copper ions based on copper/silver nanoclusters[J].Journal of Instrumental Analysis,2020,39(2):227-232. [3] 李满秀,任光明,杨俊芳,等.氨基化碳量子点荧光猝灭法测定铜[J].冶金分析,2017,37(6):61-64. LI Manxiu,REN Guangming,YANG Junfang,et al.Determination of copper by amino-functional carbon quantum dots fluorescence quenching method[J].Metallurgical Analysis,2017,37(6):61-64. [4] 杨海芬,张浩,李萍,等.基于氮掺杂碳点荧光猝灭法检测Cu2+[J].光谱学与光谱分析,2016,36(S1):369-370. YANG Haifen,ZHANG Hao,LI Ping,et al.The fluorescence quenching method for detecting copper ion based on nitrogen doped carbon dots[J].Spectroscopy and Spectral Analysis,2016,36(S1):369-370. [5] LUO Minchuan,DI Junwei,LI Liang,et al.Copper ion detection with improved sensitivity through catalytic quenching of gold nanocluster fluorescence[J].Talanta,2018,187(9):231-236. [6] LIN Meng,CHO Misuk,CHOE Woo-Seok,et al.Electrochemical detection of copper ion using a modified copolythiophene electrode[J].Electrochimica Acta,2009,54(27):7012-7017. [7] 杨海波,周文慧,甄雪,等.银纳米线柔性电极的制备及电化学方法测定水中微量铜离子[J].分析化学,2018,46(3):446-453. YANG Haibo,ZHOU Wenhui,ZHEN Xue,et al.Preparation of silver nanowires flexible electrode for electrochemical detection of trace copper in water[J].Chinese Journal of Analytical Chemistry,2018,46(3):446-453. [8] 莫东兰,张夏红,董雁,等.十二烷基苯磺酸钠增敏水杨叉-2-氨基-4-硝基苯酚分光光度法测定水中微量铜(Ⅱ) [J].冶金分析,2022,42(4):53-56. MO Donglan,ZHANG Xiahong,DONG Yan,et al.Salicylidene-2-amino-4-nitrophenol spectrophotometric determination of trace Cu(Ⅱ) in water with sodium dodecylbenzene sulfonate enhancing semsiticity[J].Metallurgical Analysis,2022,42(4):53-56. [9] 孙长霞,苏逸菲,汤梦怡,等.双波长等吸收点紫外可见分光光度法测定口蘑中微量铜(Ⅱ) 离子的研究[J].分析试验室,2019,38(12):1427-1431. SUN Changxia,SU Yifei,TANG Mengyi,et al.Determination of copper(Ⅱ) content in tricholoma by dual-wavelength isobestic point UV-visible spectrophotometry[J].Chinese Journal of Analysis Laboratory,2019,38(12):1427-1431. [10] CHEN Xueye,SHEN Jienan,LI Tiechuan.PMMA microreactor for chemiluminescence detection of Cu(Ⅱ) based on 1,10-phenanthroline-hydrogen peroxide reaction[J].J. Food Sci. Technol.,2016,53(1):915-919. [11] ZIEGLER C,EYCHMÜLLER A.Seeded growth synthesis of uniform gold nanoparticles with diameters of 15-300 nm [J].The Journal of Physical Chemistry C,2011,115(11):4502-4506. [12] 罗芳,陶映州,林振宇.金基纳米材料在传感领域的研究进展[J].福州大学学报(自然科学版),2021,49(5):588-598. LUO Fang,TAO Yingzhou,LIN Zhenyu.Progress of gold-based nanomaterials in the field of sensing[J].The Journal of Fuzhou University(Natural Science Edition),2021,49(5):588-598. [13] WENG Ziqing,WANG Hongbin,LI Runqing,et al.Self-assembly of core-satellite gold nanoparticles for colorimetric detection of copper ions[J].Analytica Chimica Acta,2013,803(19):128-134. [14] SUNG Yiming,WU Shupao.Colorimetric detection of Cd(II) ions based on di-(1H-pyrrol-2-yl) methanethione functionalized gold nanoparticles[J].Sensors & Actuators B Chemical,2014,201(4):86-91. [15] Tripathy S K,Ju Y W,Han C S.Colorimetric detection of Fe(III) ions using label-free gold nanoparticles and acidic thiourea mixture[J].Sensors & Actuators B Chemical,2013,181(3):114-118. [16] 国家环境保护局.GB/T 7475—1987水质 铜、锌、铅、镉的测定 原子吸收分光光度法[S].北京:中国标准出版社,1987.
