Performance of an electronic tongue during monitoring 2-methylisoborneol and geosmin in water samples

Braga, Guilherme S.; Paterno, Leonardo G.; Fonseca, Fernando Josepetti

doi:10.1016/j.snb.2012.02.092

Cited by 37 publications

(28 citation statements)

References 39 publications

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“…4 Changes of taste may also come from water due to the action of microorganisms, as, for example, 2-methylisoborneol and geosmin are products from algae decomposition and, depending on their concentration, can be toxic; otherwise, they give unpleasant taste and odor to water. 5 For water treatment companies it is important to constantly monitor their presence in the distributed water to avoid costumer complaints. 5 Taste changes come from additives.…”

Section: Tastementioning

confidence: 99%

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Taste

Wypych¹

2013

Handbook of Odors in Materials

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Section: Tastementioning

confidence: 99%

“…5 For water treatment companies it is important to constantly monitor their presence in the distributed water to avoid costumer complaints. 5 Taste changes come from additives. For example, presence of thioesters in polypropylene changes taste of products in contact with such polypropylene.…”

Section: Tastementioning

confidence: 99%

Taste

Wypych¹

2013

Handbook of Odors in Materials

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“…The chemical nature of these residues can range from dissolved salts, nutrients, microorganisms, or contaminants like heavy metals, pesticides, and hormones, among others. Some of these compounds can lead to the proliferation of algae, such as cyanobacteria, which are considered toxic, depending on the concentration [3]. Moreover, algae may produce compounds that give a disgusting taste and odor to water, as is the case of 2-Methyl-Isoborneol [3], which even at low concentrations can be detected by human senses [4], interfering negatively in water and beverage companies and aquaculture [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Tuning the Electrical Properties of Electrospun Nanofibers with Hybrid Nanomaterials for Detecting Isoborneol in Water Using an Electronic Tongue

et al. 2019

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The presence of contaminants in water is a subject of paramount importance nowadays, which can make water improper to human consumption even when these contaminants are present at very low concentrations, causing health issues and economic losses. In this work, we evaluated the performance of nanocomposites based on nylon 6,6/chitosan electrospun nanofibers modified by cellulose nanowhiskers combined with functional materials like silver nanoparticles, gold nanoparticles, and reduced graphene oxide to be used as sensing layers of an electronic tongue (e-tongue) to detect Isoborneol. This compound, found in some plants and essential oils, is used as a natural repellent and also to produce many other chemicals. Additionally, its chemical structure is related to that of 2-methylisoborneol, a critical pollutant in aqueous media. The synergism between the nanomaterials combined with electrospun nanofibers could be verified by the enhancement of the charge transference ability. Additionally, electrical capacitance data measured with the impedimetric e-tongue were treated by Principal Component Analysis (PCA), and revealed the sensing system was able to discriminate samples contaminated with Isoborneol at nanomolar concentrations. Moreover, the electronic tongue system could detect Isoborneol in real water samples under different concentrations.

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“…Indeed in the last decade, the use of potentiometric or voltammetric E-tongues has been increasingly reported since they have been proved to be useful in assessment of complex liquid media. Regarding drinking water analysis, E-tongues are mainly applied for: (i) monitoring water quality and detection of specific chemical compounds, possible contaminants, microorganisms, determination of sewage water concentrations in drinking water [1,7,[12][13][14][15][16][17][18]; or, (ii) water classification/authentication according to commercial brands or type of water [10,[19][20][21][22][23][24][25][26][27][28]. Water safety monitoring technologies based on E-tongues have been recently discussed by Vagin and Winquist [29], which demonstrated the potential of E-tongues for high throughput monitoring of edible or potable products.…”

Section: Introductionmentioning

confidence: 99%

Electronic tongue: a versatile tool for mineral and fruit-flavored waters recognition

et al. 2015

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Natural mineral waters (still), effervescent natural mineral waters (sparkling) and aromatized waters with fruit-flavors (still or sparkling) are an emerging market. In this work, the capability of a potentiometric electronic tongue, comprised with lipid polymeric membranes, to quantitatively estimate routinely quality physicochemical parameters (pH and conductivity) as well as to qualitatively classify water samples according to the type of water was evaluated. The study showed that a linear discriminant model, based on 21 sensors selected by the simulated annealing algorithm, could correctly classify 100 % of the water samples (leave-one out cross-validation). This potential was further demonstrated by applying a repeated K-fold cross-validation (guaranteeing that at least 15 % of independent samples were only used for internal-validation) for which 96 % of correct classifications were attained. The satisfactory recognition performance of the E-tongue could be attributed to the pH, conductivity, sugars and organic acids contents of the studied waters, which turned out in significant differences of sweetness perception indexes and total acid flavor. Moreover, the E-tongue combined with multivariate linear regression models, based on sub-sets of sensors selected by the simulated annealing algorithm, could accurately estimate water's pH (25 sensors: R 2 equal to 0.99 and 0.97 for leave-one-out or repeated K-folds cross-validation) and conductivity (23 sensors: R 2 equal to 0.997 and 0.99 for leave-one-out or repeated K-folds cross-validation). So, the overall satisfactory results achieved, allow envisaging a potential future application of electronic tongue devices for bottled water analysis and classification.

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Performance of an electronic tongue during monitoring 2-methylisoborneol and geosmin in water samples

Cited by 37 publications

References 39 publications

Taste

Taste

Tuning the Electrical Properties of Electrospun Nanofibers with Hybrid Nanomaterials for Detecting Isoborneol in Water Using an Electronic Tongue

Electronic tongue: a versatile tool for mineral and fruit-flavored waters recognition

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