期刊
MICROCHIMICA ACTA
卷 188, 期 1, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-020-04686-w
关键词
Picric acid; 2; 4; 6-trinitrophenol; Water contamination; Fluorescence determination; Lanthanide nanoparticles; Terbium nanoparticles; Coordination polymer nanoparticles; Photo electron transfer
资金
- National Natural Science Foundation of China [51573078]
- Fundamental Research Funds for the Central Universities [30919011219]
A new method based on coordination polymer nanoparticles for the selective and sensitive determination of aqueous 2,4,6-trinitrophenol has been established. The method shows good sensitivity and accuracy in real water samples, providing a feasible way to avoid the threat of contaminated drinking water.
A new method based on coordination polymer nanoparticles (CPNs) derived from nucleotides and Tb3+ ions (GMP/Tb) for the selective and sensitive determination of aqueous 2,4,6-trinitrophenol (TNP) (picric acid) is established. The fluorescence of GMP/Tb nanoparticles is effectively quenched by TNP via photo-induced charge transfer (PCT), thus achieving its selectivity toward TNP over other nitroaromatic explosives. The decreased fluorescence of GMP/Tb shows a good linear relationship to the concentrations of TNP ranging from 5.0 to 40.0 mu M, and the limit of detection is 26.0 nM (5.96 ppb). The proposed GMP/Tb probe also achieves satisfactory results in real samples. The obtained recoveries of this method in river water samples are in the range 93.15-106.10%. The relative standard deviation (RSD) are 0.57 to 1.01% based on three repeated determinations. This fabricated detector provides a feasible path for determination of ppb-level TNP in natural water samples, which can help humans to avoid TNP-contaminated drinking water.
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