A sensitive and selective sensing platform based on CdTe QDs in the presence of L-cysteine for detection of silver, mercury and copper ions in water and various drinks

被引：141

作者：

Gong, Tingting ^{[1
]}

Liu, Junfeng ^{[2
]}

Liu, Xinxin ^{[1
]}

Liu, Jie ^{[1
]}

Xiang, Jinkun ^{[1
]}

Wu, Yiwei ^{[1
]}

机构：

[1] Hubei Normal Univ, Hubei Collaborat Innovat Ctr Rare Met Chem, Hubei Key Lab Pollutant Anal & Reuse Technol, Coll Chem & Chem Engn,Inst Adv Mat, Huangshi 435002, Peoples R China

[2] Second Hosp Huangshi, Dept Clin Lab, Huangshi 435002, Peoples R China

来源：

FOOD CHEMISTRY | 2016年 / 213卷

关键词：

Cys-CdTe QDs; Fluorescence spectrofluorometer; Silver; mercury and copper ions; Water and tea infusion; CLOUD POINT EXTRACTION; GRAPHENE QUANTUM DOTS; POT GREEN SYNTHESIS; CARBON DOTS; FLUORESCENCE SENSOR; HEAVY-METALS; NANOPARTICLES; HG2+; PROBES; AG+;

D O I：

10.1016/j.foodchem.2016.06.091

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Water soluble CdTe quantum dots (QDs) have been prepared simply by one-pot method using potassium tellurite as stable tellurium source and thioglycolic acid (TGA) as stabilizer. The fluorescence of CdTe QDs can be improved 1.3-fold in the presence of L-cysteine (Cys), however, highly efficiently quenched in the presence of silver or mercury or copper ions. A sensitive and selective sensing platform for analysis of silver, mercury and copper ions has been simply established based on CdTe QDs in the presence of L-cysteine. Under the optimum conditions, excellent linear relationships exist between the quenching degree of the sensing platform and the concentrations of Ag+, Hg2+ and Cu2+ ranging from 0.5 to 40 ng mL(-1). By using masking agents of sodium diethyldithiocarbamate (DDTC) for Ag+ and Cu2+, NH4OH for Ag+ and Hg2+ and 1-(2-Pyridylazo)-2-naphthol (PAN) for Hg2+ and Cu2+, Hg2+, Cu2+ and Ag+ can be exclusively detected in coexistence with other two ions, and the detection limits (3 sigma) were 0.65, 0.063 and 0.088 ng mL(-1) for Ag+, Hg2+ and Cu2+, respectively. This effective sensing platform has been used to detection of Ag+, Hg2+ and Cu2+ in water and various drinks with satisfactory results. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：306 / 312

页数：7

共 36 条

[1] Ionothermal Synthesis of Crystalline, Condensed, Graphitic Carbon Nitride [J].

Bojdys, Michael J. ;

Mueller, Jens-Oliver ;

Antonietti, Markus ;

Thomas, Arne .

CHEMISTRY-A EUROPEAN JOURNAL, 2008, 14 (27) :8177-8182

[2] Mercaptosuccinic acid modified CdTe quantum dots as a selective fluorescence sensor for Ag+ determination in aqueous solutions [J].

Cai, Cheng ;

Cheng, Heyong ;

Wang, Yuanchao ;

Bao, Haifeng .

RSC ADVANCES, 2014, 4 (103) :59157-59163

[3] Determination of silver ion based on the redshift of emission wavelength of quantum dots functionalized with rhodanine [J].

Chen, Li ;

Zhao, Qin ;

Zhang, Xiao-Yan ;

Tao, Guan-Hong .

CHINESE CHEMICAL LETTERS, 2014, 25 (02) :261-264

[4] In Situ Building of a Nanoprobe Based on Fluorescent Carbon Dots for Methylmercury Detection [J].

Costas-Mora, Isabel ;

Romero, Vanesa ;

Lavilla, Isela ;

Bendicho, Carlos .

ANALYTICAL CHEMISTRY, 2014, 86 (09) :4536-4543

[5] Synthesis of L-glutathione-capped-ZnSe quantum dots for the sensitive and selective determination of copper ion in aqueous solutions [J].

Ding, Yongling ;

Shen, Shirley Z. ;

Sun, Huadong ;

Sun, Kangning ;

Liu, Futian .

SENSORS AND ACTUATORS B-CHEMICAL, 2014, 203 :35-43

[6] Polyamine-Functionalized Carbon Quantum Dots as Fluorescent Probes for Selective and Sensitive Detection of Copper Ions [J].

Dong, Yongqiang ;

Wang, Ruixue ;

Li, Geli ;

Chen, Congqiang ;

Chi, Yuwu ;

Chen, Guonan .

ANALYTICAL CHEMISTRY, 2012, 84 (14) :6220-6224

[7] "Turn-On" Fluorescent Sensor for Hg2+ Based on Single-Stranded DNA Functionalized Mn:CdS/ZnS Quantum Dots and Gold Nanoparticles by Time-Gated Mode [J].

Huang, Dawei ;

Niu, Chenggang ;

Wang, Xiaoyu ;

Lv, Xiaoxiao ;

Zeng, Guangming .

ANALYTICAL CHEMISTRY, 2013, 85 (02) :1164-1170

[8] Size-controlled sensitivity and selectivity for the fluorometric detection of Ag+ by homocysteine capped CdTe quantum dots [J].

Jiao, Hangzhou ;

Zhang, Ling ;

Liang, Zhenhua ;

Peng, Guihua ;

Lin, Hengwei .

MICROCHIMICA ACTA, 2014, 181 (11-12) :1393-1399

[9] An ultra sensitive fluorescent nanosensor for detection of ionic copper [J].

Kacmaz, Sibel ;

Ertekin, Kadriye ;

Mercan, Deniz ;

Oter, Ozlem ;

Cetinkaya, Engin ;

Celik, Erdal .

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2015, 135 :551-559

[10] Selective turn-on fluorescence sensor for Ag+ using cysteamine capped CdS quantum dots: Determination of free Ag+ in silver nanoparticles solution [J].

Khantaw, Thitima ;

Boonmee, Chanida ;

Tuntulani, Thawatchai ;

Ngeontae, Wittaya .

TALANTA, 2013, 115 :849-856

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