Citation: DENG Xiang, HUANG Xiao-Mei, QI Wen-Jing, WU Di. Preparation of Fluorescence Carbon Nanodots by Maca and Development of Fluorescent Probe for Picric Acid Detection[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(12): 1880-1886. doi: 10.11895/j.issn.0253-3820.160114 shu

Preparation of Fluorescence Carbon Nanodots by Maca and Development of Fluorescent Probe for Picric Acid Detection

1.
Department of Chemistry and Chemical Engineering, Sichuan University of Arts and Science, Dazhou 635000, China;
2.
College of Chemistry, Chongqing Normal University, Chongqing 401331, China

Received Date: 21 February 2016
Revised Date: 5 May 2016

Fluorescent carbon nanodots were prepared by utilizing Maca as a carbon source via hydrothermal method. The carbon nanodots solution had a maximal fluorescent light emission at 425 nm and the excitation wavelength at 315 nm. Fluorescent light emission intensity of carbon nanodots solution could be effectively quenched by picric acid (PA) in 0.2 mol/L phosphate (pH 5.8) buffer conditions. Based on this, a novel method for the determination of picric acid was developed using carbon nanodots as fluorescent probe. This method had broad linear range from 0.4 μmol/L to 80 μmol/L with a correlation coefficient of 0.9978. The limit of detection (LOD, 3σ) was 0.11 μmol/L. Furthermore, it exhibited good selectivity and fast response time (within 2 min). The method was successfully applied in the detection of PA in real water samples with spiked recoveries ranging from 92.0% to 110.0%.
- Maca,
- Fluorescence carbon nanodots,
- Picric acid,
- Fluorescence probe
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