S,N-Doped carbon dots for tetracyclineISs sensing with a fluorometric spectral response

被引:69
|
作者
Xing, Xuejian [1 ]
Huang, Li [1 ]
Zhao, Shaojing [1 ]
Xiao, Jiafu [2 ]
Lan, Minhuan [1 ,3 ]
机构
[1] Cent South Univ, Coll Chem & Chem Engn, Key Lab Hunan Prov Water Environm & Agr Prod Safe, Changsha 410083, Peoples R China
[2] Hunan Univ Med, Hunan Prov Key Lab Antibody Based Drug & Intellig, Huaihua 418000, Peoples R China
[3] Cent South Univ, Shenzhen Res Inst, Shenzhen 518057, Peoples R China
关键词
Carbon dots; Doping; Fluorometric probe; Tetracyclines; RATIOMETRIC FLUORESCENCE PROBE; HIGHLY SELECTIVE DETECTION; GRAPHENE QUANTUM DOTS; SENSITIVE DETECTION; NANODOTS; SENSOR;
D O I
10.1016/j.microc.2020.105065
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
S,N-doped carbon dots (S,N-CDs) were facilely prepared via a hydrothermal method by using thiourea and citric acid (CA) as precursors. The as-prepared S,N-CDs exhibited high stability in aqueous solution and were applied for fluorometric detection of tetracyclines (TCs). The approach was developed on the basic of the fluorescence of S,N-CDs at 440 nm, which was selectively quenched by TCs through the inner filter effect (IFE) mechanism. Moreover, the fluorescence of TCs with maximum at 600 nm could be used as the internal standard signal, resulting in a fluorometric spectral response. The limit of detection (LOD) was 0.25, 0.39 and 0.26 mu M for tetracycline (TC), doxycycline (DC) and oxytetracycline (OTC), respectively. Furthermore, S,N-CDs were successfully utilized for the detection of residual TCs in fish and pork samples with acceptable recovery and good RSD.
引用
收藏
页数:8
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