Publication: Colorimetric detection of Cr3+ in dietary supplements using a smartphone based on EDTA and tannic acid-modified silver nanoparticles
2
0
Issued Date
2021
Resource Type
File Type
application/pdf
ISSN
13861425
Other identifier(s)
2-s2.0-85092640225
Rights
Srinakharinwirot University
Rights Holder(s)
มหาวิทยาลัยศรีนครินทรวิโรฒ
Bibliographic Citation
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy. Vol 246, (2021)
Suggested Citation
Sangsin S., Srivilai P., Tongraung P. Colorimetric detection of Cr3+ in dietary supplements using a smartphone based on EDTA and tannic acid-modified silver nanoparticles. Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy. Vol 246, (2021). doi:10.1016/j.saa.2020.119050 Retrieved from: https://hdl.handle.net/20.500.14740/4343
Author(s)
Abstract
A simplistic, portable and low-cost method for the rapid detection of Cr3+ was developed based on a smartphone readout and a co-functionalized silver nanoparticles (AgNPs) system for use as an on-site device in resource-poor areas. The presence of Cr3+ induced aggregation of AgNPs through coordinated complex formation between Cr3+ and stabilizing agents on the NPs surface, resulted in a bright yellow of an AgNPs solution turned to wine red along with a SPR band was red-shifted from 429 nm to 625 nm. A smartphone with an available free application, called “PhotoMetrix” was used to measure the RGB (red, green, blue) values of the color intensities in the AgNPs system and convert into Cr3+ concentration by using univariate calibration curves in less than 60s. This smartphone-based detection system showed a high selectivity of AgNPs with Cr3+ and gave a positive coefficient correlation (R2 = 0.9878) between the intensity of channel R and the Cr3+ concentration, with a linear range of 2.0–5.0 mg L−1, and a detection limit of 1.52 mg L−1. Furthermore, the proposed method has been successfully applied for quantification of Cr3+ in dietary supplement samples. The results obtained were in close agreement with those obtained in FAAS (Flame Atomic Absorption Spectrometry). The developed colorimetric system based on a smartphone readout device exhibits feasibility and reliability for on-site Cr3+ detection in the real samples. © 2020 Elsevier B.V.
Subject(s)
Absorption spectroscopy
Atomic absorption spectrometry
Colorimetry
Coordination reactions
Food additives
Metal nanoparticles
Nutrition
Red Shift
Silver nanoparticles
Smartphones
Vitamins
Calibration curves
Colorimetric detection
Coordinated complexes
Detection limits
Flame atomic absorption spectrometry
Positive coefficients
Silver nanoparticles (AgNps)
Stabilizing agents
Dietary supplements
Atomic absorption spectrometry
Colorimetry
Coordination reactions
Food additives
Metal nanoparticles
Nutrition
Red Shift
Silver nanoparticles
Smartphones
Vitamins
Calibration curves
Colorimetric detection
Coordinated complexes
Detection limits
Flame atomic absorption spectrometry
Positive coefficients
Silver nanoparticles (AgNps)
Stabilizing agents
Dietary supplements