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

Kun Hua Lu, Jia Hui Lin, Cheng Yu Lin, Chien Fu Chen, Yi Chun Yeh

研究成果: 雜誌貢獻文章

9 引文 斯高帕斯(Scopus)


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 330/420 nm, depends on the pH value in the range from pH 2 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 1 mM concentration range, and the detection limit (at S/N = 3) is 0.14 mM. The test was applied to the determination of chromium(VI) in (spiked) environmental water samples. [Figure not available: see fulltext.].

期刊Microchimica Acta
出版狀態已發佈 - 2019 四月 1


ASJC Scopus subject areas

  • Analytical Chemistry