A fluorometric paper test for chromium(VI) based on the use of N-doped carbon dots

被引：53
|
作者：
Lu, Kun-Hua [1 ]
Lin, Jia-Hui [2 ]
Lin, Cheng-Yu [1 ]
Chen, Chien-Fu [2 ]
Yeh, Yi-Chun [1 ]
机构：
[1] Natl Taiwan Normal Univ, Dept Chem, Taipei 11677, Taiwan
[2] Natl Taiwan Univ, Inst Appl Mech, Taipei 10617, Taiwan
来源：
MICROCHIMICA ACTA | 2019年 / 186卷 / 04期
关键词：
Carbon dots; Three-dimensional paper analytical devices; Chromium(VI); Origami; Paper microfluidic; Fluorescence; Environmental analysis; LABEL-FREE DETECTION; ON-PAPER; LOW-COST; CHEMILUMINESCENCE; NANODOTS; IONS; GOLD; PRECONCENTRATION; IMMUNODEVICE; IMMUNOASSAY;
D O I：
10.1007/s00604-019-3337-5
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Water-soluble nitrogen-doped carbon quantum dots (C-dots) were fabricated by microwave-induced decomposition of the precursor materials citric acid and N,N-bis(2-aminoethyl)-1,2-ethanediamine. The C-dots were placed on portable paper strips with novel origami designs to simplified user operations. The intensity of the blue fluorescence, best measured at excitation/emission wavelengths of 330/420nm, depends on the pH value in the range from pH2 to 12. The C-dots on the paper stripe are shown to be a sensitive fluorescent probe for chromium(VI) via an inner filter effect. Response is linear in the 0.08 to 1mM concentration range, and the detection limit (at S/N=3) is 0.14mM. The test was applied to the determination of chromium(VI) in (spiked) environmental water samples.
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页数：7
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