Using a biphasic system and digital imaging analysis with chemometric tools for simultaneous determination of Cu<sup>2+</sup> and furfural in cachaça

Franco, Mathews; Cardoso, Wilson J; Vilanculo, Castelo Bandane; Santos, Vagner Bezerra dos; Almeida, João Paulo de; Capitán-Vallvey, L.F.; Suarez, Willian Toito

doi:10.1039/d3ay00311f

Cited by 6 publications

(1 citation statement)

References 53 publications

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“…The use of images obtained from digital devices and their processing to obtain the color modes (e. g. RGB, HSV, CMYK, and grayscale) has been successfully explored for the determination of Ca 2+ , Co 2+ , Cr 6+ , Cu 2+ , Hg 2+ , Fe 3+ , Fe 2+ , Mg 2+ and Pb 2+ in colored solutions from water, [16–21] alcoholic beverages, [22–25] foodstuffs, [21,26–27] soils, [20] and biodiesel [28] samples. These methods are attractive due to their simplicity, inexpensiveness, high sample throughput, and possible portability.…”

Section: Introductionmentioning

confidence: 99%

Direct Determination of the Aluminum Content in Antiperspirants Using Digital Image Colorimetry

Teixeira,

Virgilio,

Santos

2023

ChemistrySelect

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In this work a dilute‐and‐shoot procedure using digital image colorimetry (DIC) was evaluated for the determination of aluminum in antiperspirants. Derivatization was performed by means of the reaction between Al(III) and Alizarin Red S (ARS) reagent. Digital images were acquired using a table scanner and the average values for red, green and blue channels (RGB) were obtained. Optimal conditions were set at pH=4.5, ARS concentrations 10‐fold higher than Al(III) and using the G channel. The method presented linearity in the 2.0–10.0 mg L−1 range, the limit of detection (LOD) was 1.1 mg L−1 and precision was better than 2.55 %. Accuracy was checked by the analysis of spiked samples at 2.0 and 4.0 mg L−1 Al(III), and good recoveries (82.6–117.5 %) were obtained. Eight samples of roll‐on antiperspirants were analyzed by the proposed colorimetric method and the well‐stablished flame atomic absorption spectrometry (FAAS) comparative method. The obtained results were not statistically different at 95 % confidence level. An analytical greenness assessment was performed for both methods and the procedure based on digital image colorimetry was proven to be a greener approach due to miniaturization, low sample consumption, least amount of waste and high sample throughput.

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Section: Introductionmentioning

confidence: 99%

Direct Determination of the Aluminum Content in Antiperspirants Using Digital Image Colorimetry

Teixeira,

Virgilio,

Santos

2023

ChemistrySelect

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Smartphone-based digital images in analytical chemistry: Why, when, and how to use

Soares,

Fernandes,

Rocha

2023

TrAC Trends in Analytical Chemistry

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Determination of Thermodynamic Parameters Using Digital Image-Based Method

dos Santos,

de Sousa,

Farias

et al. 2023

J. Chem. Educ.

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Seeking to foster the learning process and encourage the active participation of undergraduate students, this work proposes a new methodology that involves integrating smartphones into the learning process under a simple and accessible approach to learning in Chemistry and Physics laboratories aiming at facilitating the learning of some chemical concepts, such as thermodynamics and chemical equilibrium. Using RGB model data collected from images captured by students’ smartphones, the ΔH°, ΔS°, and ΔG° values of a colorimetric reaction with cobalt complexes were obtained using the equilibrium constant (K eq) and the concentrations of two complex cobalt ions at varying temperatures. The values obtained from the experiments conducted by the students were in agreement with those reported in the literature at 95% confidence level. The main pedagogical objective of this experiment was to show that based on digital images obtained from a smartphone, one can understand basic physical-chemistry concepts, taught in undergraduate courses, through the application of a simple methodology based on a widely accessible, low-cost technological device, and obtain results similar to those of UV–vis spectrophotometry. The use of digital images led to better assimilation of the concepts of reflectance and absorbance. The students considered the experimental procedure to be positively surprising, since they could use their smartphones to carry out the experiment. This work also presents a step-by-step guide for the acquisition of thermodynamic data using digital images from a smartphone.

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Using a biphasic system and digital imaging analysis with chemometric tools for simultaneous determination of Cu²⁺ and furfural in cachaça

Abstract: The present study reports, for the first time, the development and application of a highly efficient method based on digital imaging analysis for the simultaneous determination of Cu2+ and furfural...

Cited by 6 publications

References 53 publications

Direct Determination of the Aluminum Content in Antiperspirants Using Digital Image Colorimetry

Direct Determination of the Aluminum Content in Antiperspirants Using Digital Image Colorimetry

Smartphone-based digital images in analytical chemistry: Why, when, and how to use

Determination of Thermodynamic Parameters Using Digital Image-Based Method

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Using a biphasic system and digital imaging analysis with chemometric tools for simultaneous determination of Cu2+ and furfural in cachaça

Abstract: The present study reports, for the first time, the development and application of a highly efficient method based on digital imaging analysis for the simultaneous determination of Cu2+ and furfural...

Cited by 6 publications

References 53 publications

Direct Determination of the Aluminum Content in Antiperspirants Using Digital Image Colorimetry

Direct Determination of the Aluminum Content in Antiperspirants Using Digital Image Colorimetry

Smartphone-based digital images in analytical chemistry: Why, when, and how to use

Determination of Thermodynamic Parameters Using Digital Image-Based Method

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Product

Resources

About

Using a biphasic system and digital imaging analysis with chemometric tools for simultaneous determination of Cu²⁺ and furfural in cachaça