Browsing Research Articles by Author "Cheng, W."

Now showing items 1-3 of 3

In situ cocoa beans quality grading by near-infrared-chemodyes systems.

Kutsanedzie, F. Y.; Chen, Q.; Sun, H.; Cheng, W. (Analytical Methods, 2017)

Fermentation level is a key bean quality indicator in the cocoa industry. Colorimetric sensor e-nose (CS e-nose) and an innovatively designed near infrared chemo-intermediary-dyes spectra technique (NIR-CDS) combined with ...
A nanosystem composed of upconversion nanoparticles and N, N-diethyl-p-phenylenediamine for fluorimetric determination of ferric ion.

Chen, M.; Kutsanedzie, F. Y.; Cheng, W.; Agyekum, A. A.; Li, H.; Chen, Q (Microchimica Acta, 2018)

A system composed of upconversion nanoparticles (UCNPs) and N,N-diethyl-p-phenylenediamine (EPA) is shown to be a useful probe for highly sensitive and selective fluorometric determination of ferric ion. The fluorescence ...
Ratiometric fluorescence detection of Cd2+ and Pb2+ by inner filter-based upconversion nanoparticle-dithizone nanosystem.

Chen, M.; Kutsanedzie, F. Y.; Cheng, W.; Li, H.; Chen, Q. (Microchemical Journal, 2019)

This paper reports a fluorescence sensor based on inner filter effect (IFE) between upconversion nanoparticles (UCNPs) and dithizone for the highly selective and sensitive detection of cadmium ion (Cd2+) and lead ion (Pb2+) ...

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