Smartphone-based colorimetric determination of fluoride anions using polymethacrylate optode

Saranchina, N. V.; Slizhov, Yuriy G.; Vodova, Y.M.; Murzakasymova, N.S.; Ilyina, A.M.; Гавриленко, Н. А.; Гавриленко, М. А.

doi:10.1016/j.talanta.2021.122103

Cited by 18 publications

(7 citation statements)

References 34 publications

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“…The formation of a 1 : 2 stable stoichiometric complex between the receptor and F − ions was confirmed since the data did not follow a linear pattern. 33…”

Section: Resultsmentioning

confidence: 99%

“…The formation of a 1 : 2 stable stoichiometric complex between the receptor and F − ions was conrmed since the data did not follow a linear pattern. 33 The majority of F − sensors in the literature are only useful for detecting organic quaternary uoride salts, whereas commercially available products like toothpaste and mouthwash and many more contain F − in the inorganic form. Further UV-vis titration was carried out using incremental addition of NaF ions to the receptor (2.5 × 10 −5 M) in DMSO.…”

Section: Uv-visible Spectral Analysis and Ph Studiesmentioning

confidence: 99%

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Ratiometric colorimetric detection of fluoride ions using a schiff base sensor: enhancing selectivity and sensitivity for naked-eye analysis

Mahishi,

Shet,

Mane

et al. 2023

Anal. Methods

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“…The formation of a 1 : 2 stable stoichiometric complex between the receptor and F − ions was confirmed since the data did not follow a linear pattern. 33…”

Section: Resultsmentioning

confidence: 99%

Section: Uv-visible Spectral Analysis and Ph Studiesmentioning

confidence: 99%

Ratiometric colorimetric detection of fluoride ions using a schiff base sensor: enhancing selectivity and sensitivity for naked-eye analysis

Mahishi,

Shet,

Mane

et al. 2023

Anal. Methods

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“…A polymethacrylate matrix was taken to tightly immobilize BCP and allow easy permeation of the analyte. There are good examples of applying PMM for the solid-phase quantification of various species [21][22][23][24][25]. The initial 6.5 pH value of spoiled milk [26] coincides with BCP's pK a value 6.5 ± 0.3 in the PMM.…”

Section: Introductionmentioning

confidence: 90%

Optical pH Sensing in Milk: A Small Puzzle of Indicator Concentrations and the Best Detection Method

2021

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Optical chemical sensors can yield distinctively different responses that are dependent on the method applied for readout and evaluation. We therefore present a comprehensive study on the pH determined non-continuously with optical sensors in real milk samples by either photometry or colorimetry (via the RGB-readout of digital images) compared to the pH values obtained electrochemically by potentiometry. Additionally, the photometric determination of pH was conducted with single-wavelength and a dual wavelength ratiometric evaluation of the absorbance. It was found that both the precision and accuracy of the pH determined by photometry benefit from lower concentrations of bromocresol purple, which served as the pH indicator inside the sensor membrane. A further improvement is obtained by the ratiometric evaluation of the photometric sensor response. The pH values obtained from the colorimetric evaluation, however, gain in precision and accuracy if a higher concentration of the indicator is immobilized inside the sensor membrane. This has a major impact on the future fabrication of optical pH sensor membranes because they can be better tuned to match to the most precise and accurate range of the planned detection method.

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“…The smartphone-based methods exhibit a highly comparable performance of analysis according to the traditional methods (14,15). Analysis of different kinds of samples by smartphone is based on the measurement of red (R), green (G), and blue (B) values with help of various software (15)(16)(17).…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric and Smartphone-based Dual Monitoring Method for the Determination of Al(III) Ions Using Fermented Black Carrot Juice (Şalgam/Shalgam) as a Green Chromogenic Agent

Yardımcı

2023

Journal of the Turkish Chemical Society Section A: Chemistry

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In this study, anthocyanin-rich fermented black carrot juice (şalgam/shalgam) was used as a chromogenic agent in order to develop eco-friendly, low-cost, simple, fast, and practical both visible spectrophotometric and smartphone-based methods for the determination of Al(III) ions in water samples. Formation of Al(III)-anthocyanin complex results in a color change from red to purple in direct proportion to the increasing Al(III) concentration. For the spectrophotometric analysis, the analytical response of the developed method between absorbance and logarithm of Al(III) concentration exhibits a satisfying wide linear concentration range from 37.0 to 1850.0 µM. The LOD and LOQ values are 6.67 µM and 22.0 µM, respectively. For smartphone-based analysis, the analytical response of the developed method between B values and Al(III) concentration obtained a linear concentration range from 18.5 to 111.0 µM. The LOD and LOQ values are 4.40 µM and 14.5 µM, respectively. LOD values are below the acceptable limit of Al(III) in water according to WHO (7.41 µM) for both methods. The interfering effect of common water ions was investigated, and the observed interferences from Sn2+, Fe2+, and Fe3+ were easily eliminated using enough concentration of Na2EDTA without affecting the blank absorbance/B value of the Al(III)−anthocyanin complex for two monitoring methods. The selectivity of the developed method was investigated in the presence of possible species such as benzoic acid, lactic acid, amino acids, and salt. Developed spectrophotometric and smartphone-based methods applied to real water samples and validated against the reference ICP-OES method at 95% confidence level using Student’s t- and F-tests.

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Smartphone-based colorimetric determination of fluoride anions using polymethacrylate optode

Cited by 18 publications

References 34 publications

Ratiometric colorimetric detection of fluoride ions using a schiff base sensor: enhancing selectivity and sensitivity for naked-eye analysis

Ratiometric colorimetric detection of fluoride ions using a schiff base sensor: enhancing selectivity and sensitivity for naked-eye analysis

Optical pH Sensing in Milk: A Small Puzzle of Indicator Concentrations and the Best Detection Method

Spectrophotometric and Smartphone-based Dual Monitoring Method for the Determination of Al(III) Ions Using Fermented Black Carrot Juice (Şalgam/Shalgam) as a Green Chromogenic Agent

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