Combination of paper-based thin film microextraction with smartphone-based sensing for sulfite assay in food samples

Shahvar, Ali; Saraji, Mohammad; Gordan, Hasti; Shamsaei, Danial

doi:10.1016/j.talanta.2019.01.071

Cited by 61 publications

(15 citation statements)

References 28 publications

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“…2 ). Of the 56 articles analysed only three used different smartphones to detect the effects of inter-phone variation on the measurements [ 21 , 25 , 37 ]. Ross et al.…”

Section: Hardware/software Development and Image Analysis Proceduresmentioning

confidence: 99%

“…Another study described quantification of sulphite in foodstuffs through blue intensity variation caused by sulphite driven Fe (III) reduction. The study reported no significant statistical differences in the predictions obtained with five smartphone models [ 37 ]. The study reported good sensitivity (LOD 0.04 μg.L −1 ) and correlation coefficients > 0.99.…”

Section: Hardware/software Development and Image Analysis Proceduresmentioning

confidence: 99%

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Smartphone-based optical assays in the food safety field

Nelis

Tsagkaris

Dillon

et al. 2020

TrAC Trends in Analytical Chemistry

114

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Smartphone based devices (SBDs) have the potential to revolutionize food safety control by empowering citizens to perform screening tests. To achieve this, it is of paramount importance to understand current research efforts and identify key technology gaps. Therefore, a systematic review of optical SBDs in the food safety sector was performed. An overview of reviewed SBDs is given focusing on performance characteristics as well as image analysis procedures. The state-of-the-art on commercially available SBDs is also provided. This analysis revealed several important technology gaps, the most prominent of which are: (i) the need to reach a consensus regarding optimal image analysis, (ii) the need to assess the effect of measurement variation caused by using different smartphones and (iii) the need to standardize validation procedures to obtain robust data. Addressing these issues will drive the development of SBDs and potentially unlock their massive potential for citizen-based food control.

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“…2 ). Of the 56 articles analysed only three used different smartphones to detect the effects of inter-phone variation on the measurements [ 21 , 25 , 37 ]. Ross et al.…”

Section: Hardware/software Development and Image Analysis Proceduresmentioning

confidence: 99%

Section: Hardware/software Development and Image Analysis Proceduresmentioning

confidence: 99%

Smartphone-based optical assays in the food safety field

Nelis

Tsagkaris

Dillon

et al. 2020

TrAC Trends in Analytical Chemistry

114

View full text Add to dashboard Cite

show abstract

“…However, they had never been reported for the determination of cyanide. Moreover, paper-based headspace extraction has been developed to enhance the sensitivity and selectivity for sulfite [21], sulfur dioxide [22], volatile organic compounds [23], hydrogen sulfide [24], arsenic [25], and zinc [26] determination. Cyanide will exist as HCN at more acidic than pH 5 so paper-based headspace extraction can be applied for the highly sensitive and selective determination of cyanide.…”

Section: Introductionmentioning

confidence: 99%

Distance-Based Paper Device Combined with Headspace Extraction for Determination of Cyanide

Khatha

Phutthaphongloet

Timpa

et al. 2019

Sensors

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We report for the first time a distance-based paper device based on gold/silver core shell nanoparticles (Au@Ag NPs) for a simple, inexpensive, instrument-free, and portable determination of cyanide by the naked eye. Au@Ag NPs immobilized on a paper channel were etched by cyanide ions so that a yellow color band length of Au@Ag NPs is proportional to a decrease in the cyanide concentration. Quantification is achieved by measuring color length, thus eliminating the need to differentiate hues and intensities by the user, and the processing data of each imaging device. Moreover, the paper-based headspace extraction was combined with the distance-based paper device to improve the sensitivity. The enrichment factor was found to be 30-fold and the linearity was found in the range 0.05–1 mg L−1. The naked eye detection limit was 10 μg L−1 where the World Health Organization (WHO) have regulated the maximum level of cyanide in drinking water as 70 μg L−1. Our proposed device also showed no interference from common cations and anions presenting in seawater and waste water including thiocyanate, chloride. Finally, our device has been successfully applied to determine cyanide ions in seawater, drinking water, tap water and wastewater providing satisfactory precision and accuracy.

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“…Spectroscopic TAC determination procedures use synthetic free radicals (ABTS, DPPH, etc. ), transition metals complexes (iron (III), copper(II), and chromium(VI) [5][6][7][8][9][10][11][12][13][14]), metal ions (iron(III) and cerium(IV) [2,15]), and nanoparticles [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Such sensor materials are efficient for colorimetric and spectroscopic determinations. A few solid matrices have been employed up to date for FRAP reagent immobilization (paper [12], polymethacrylate [13], and Nafion membrane [14]) and in CUPRAC reagent immobilization (carrageenan film [7] and Nafion membrane [9,10]).…”

Section: Introductionmentioning

confidence: 99%

Silica and Silica–Titania Xerogels Doped with Iron(III) for Total Antioxidant Capacity Determination

2021

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In order to design a sensor material for total antioxidant capacity determination we have prepared silica and silica–titania xerogels doped with iron(III) and modified with 1,10-phenanthroline. Titanium(IV) tetraethoxyde content in the precursors (titanium(IV) tetraethoxyde and tetraethyl orthosilicate) mixtures has been varied from 0 to 12.5% vol. Iron(III) concentrations in sol has been varied from 1 to 100 mM. The increase of titanium(IV) content has led to a decrease in BET surface area and average pore diameter and an increase of micropore surface area and volume, which has resulted in better iron(III) retention in the xerogels. Iron(III), immobilized in the xerogel matrix, retains its ability to form complexes with 1,10-phenanthroline and to be reduced to iron(II). Static capacities for 1,10-phenanthroline have been determined for all the iron(III) doped xerogels (0.207 mmol/g–0.239 mmol/g) and they are not dependent on the iron(III) content. Sensor materials—xerogels doped with iron(III) and modified with 1,10-phenanthroline—have been used for antioxidants (catechol, gallic and ascorbic acids, and sulphite) solid phase spectrophotometric determination. Limits of detection for catechol, gallic and ascorbic acids, and sulphite equal 7.8 × 10−6 M, 5.4 × 10−6 M, 1.2 × 10−5 M, and 3.1 × 10−4 M, respectively. The increase of titanium(IV) content in sensor material has led to an increase of the reaction rate and the sensitivity of determination. Proposed sensor materials have been applied for total antioxidant capacity (in gallic acid equivalents) determination in soft beverages, have demonstrated high stability, and can be stored up to 6 months at room temperature.

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Combination of paper-based thin film microextraction with smartphone-based sensing for sulfite assay in food samples

Cited by 61 publications

References 28 publications

Smartphone-based optical assays in the food safety field

Smartphone-based optical assays in the food safety field

Distance-Based Paper Device Combined with Headspace Extraction for Determination of Cyanide

Silica and Silica–Titania Xerogels Doped with Iron(III) for Total Antioxidant Capacity Determination

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