A Simple and Sensitive Assay of Gallic Acid Based on Localized Surface Plasmon Resonance Light Scattering of Silver Nanoparticles through Modified Tollens Process

Wang, Huiying; Chen, Dinglong; Wei, Yongju; Chang, Yongfang; Zhao, Jing

doi:10.2116/analsci.27.937

Cited by 34 publications

(11 citation statements)

References 25 publications

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“…Therefore, the accurate determination of GA is a very important concern for human health. To date, many methods have been developed for the determination of GA, such as flow injection analysis [5], resonance light scattering [6], reversed phase high-performance liquid chromatography (HPLC) [7], high-pressure liquid chromatography coupled with quadrupole time-of-flight tandem mass spectrometry (HPLC-ESI-QTOF-MS/MS) [2] electrochemical sensors and nano-structured sensors [1,[8][9][10]. Among these, electrochemical methods have received much attention lately, mainly due to their sensitivity, selectivity and simplicity.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Voltammetric Determination of Gallic and Protocatechuic Acids in Mango Juice Using a Reduced Graphene Oxide-Based Electrochemical Sensor

et al. 2019

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A simple and sensitive reduced graphene oxide-modified glassy carbon electrode-based electrochemical sensor was used for the concomitant determination of gallic acid (GA) and protocatechuic (PA) acid. The prepared sensor showed a significant enhancement in synergetic electro-catalytic performance towards GA and PA oxidation. A good resolution of the voltammetry peaks was obtained and a method of square wave voltammetry was developed for detection. The modified electrode was characterized by electrochemical techniques. The optimal experimental parameters were considered. GA and PA exhibited a linear increase in the peak currents with their concentrations in the range from 20 to 144 µmol·L−1 for GA and from 20 to 166 µmol·L−1 for PA, with limits of detection (S/N = 3) of 30.8 µmol·L−1 for GA and 10.2 µmol·L−1 for PA. The sensor applicability was simultaneously tested for the analytical determination of GA and PA in mango juice and exhibited a robust functionality.

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Section: Introductionmentioning

confidence: 99%

Simultaneous Voltammetric Determination of Gallic and Protocatechuic Acids in Mango Juice Using a Reduced Graphene Oxide-Based Electrochemical Sensor

et al. 2019

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“…1. Recently, the potential application of nanoparticles for biological detection in Chinese medicine and the impact of nanoparticles on the luminescence of traditional Chinese medicine have gradually attracted the attention of investigators [26]. Therefore, as a new type of Chinese medicine fluorescence probe, osthole is selected as the chromophore to study the luminescence properties of osthole in the presence of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Fluorescence quenching of osthole by silver nanoparticles

et al. 2013

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The luminescence properties of osthole in the presence of spherical silver nanoparticles (AgNPs) with sizes ranging from 5 to 25 nm were investigated by means of fluorescence and absorption spectroscopic experiments, as well as time-resolved fluorescence experiments. Quenching of the fluorescence of osthole has been found to increase with a reduction in the sizes of the silver nanoparticles. Using the Gersten-Nitzan model, the theoretical and experimental results were compared, and the results are in good unity. Stern-Volmer quenching constants have also been calculated. Both dynamic quenching and static quenching mechanisms exist between osthole molecules and silver nanoparticles.

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“…The Tollens process has been employed for many decades in the electroless deposition of silver to generate reective mirrors on the surface of solid supports. 24 The advantages of the present method against the traditional Tollens process for visualizing LFPs are that: (1) the modied Tollens process is simple and convenient; (2) the ink is stable for months, when stored in a sealed vial at 4 C; (3) this method enables in situ formation of AgNPs on the surfaces of many materials. 22 Furthermore, we found that the Tollens process cannot be used for visualization of LFPs even on glass slide, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%