Versatile inexpensive paper-based chemosensor to detects trimethylamine: A proof of concept

Geetha, Mithra; Kallingal, Nithusha; Sha, Mizaj Shabil; Sadasivuni, Kishor Kumar; Sawali, Mona; Alsaedi, Fatimatulzahraa; Morsy, Hagar; Ibrahim, Muna; Ahmed, Alaa Elsafi; Abuznad, Raghad; Alruwaili, Aeshah

doi:10.1016/j.sna.2022.113437

Cited by 7 publications

(7 citation statements)

References 31 publications

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“…The noticeable color shift provides a simple method for detecting CO 2 with the naked eye. The UV analysis revealed hypsochromic shift in the cases of phenol red solution and m-cresol purple solution as demonstrated by a change in spectral band position in the absorption spectrum to a shorter wavelength (Geetha et al 2022 ). The color of m-cresol purple showed two absorption peaks.…”

Section: Resultsmentioning

confidence: 99%

“…Most breaths contain acetone, isoprene, methanol, ethanol, and other alkanes and alcohols (Lin et al 2020 ). An average adult's exhaled breath contains 35,000 to 45,000 parts per million (ppm) of CO 2 , 100 times greater than what is found in the outside air (OSA) (Geetha et al 2022 ). Abnormal CO 2 levels could indicate an electrolyte imbalance in the body or difficulty in breathing.…”

Section: Introductionmentioning

confidence: 99%

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Highly sensitive and selective colorimetric sensing of CO2 for biomedical applications

et al. 2022

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The concentration of carbon dioxide (CO2) in unhealthy people differs greatly from healthy people. High-precision CO2 detection with a quick response time is essential for many biomedical applications. A major focus of this research is on the detection of CO2, one of the most important health biomarkers. We investigated a low-cost, flexible, and reliable strategy by using dyes for colorimetric CO2 sensing in this study. The impacts of temperature, pH, reaction time, reusability, concentration, and dye selectivity were studied thoroughly. This study described real-time CO2 analysis. Using this multi-dye method, we got an average detection limit of 1.98 ppm for CO2, in the range of 50–120 ppm. A portable colorimetric instrument with a smartphone-assisted unit was constructed to determine the relative red/green/blue values for real-time and practical applications within 15 s of interaction and the readings are very similar to those of an optical fiber probe. Environmental and biological chemistry applications are likely to benefit greatly from this unique approach.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly sensitive and selective colorimetric sensing of CO2 for biomedical applications

et al. 2022

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“…Where m is the calibration plot's slope, and σ is the intercept's standard deviation [16,[20][21][22][23].…”

Section: Preparation Of Reagents and Analysismentioning

confidence: 99%

A paper-based colourimetric sensor for sodium sulfite detection in beverages

et al. 2023

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Sulfite is a common food additive that prevents oxidation from damaging food nutrients, and it has long been used in the food industry as a bleaching agent. It can harm the human body if taken wrongly or excessively. In this study, three dyes (cresol red, chlorophenol red, and bromocresol green) were explored to analyze the presence of sodium sulfite (SS) in an inexpensive, disposable paper sensor with a lower visible detection limit of 0.05 M. This visual paper sensor detects sodium sulfite with high selectivity and sensitivity at room temperature. An IoT-based sensor was also developed to practically apply the developed method, which is rapid and low-cost and can replace heavy-duty instruments. Both these sensors can substantially impact scenarios such as food quality monitoring and detecting sodium sulfite in medicinal items. Graphical Abstract

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“…Human exhaled breath can be a useful indicator for various issues in our respiratory system and can be used to detect various diseases and conditions. (Sha et al 2022a , b , c ; Sha et al 2022a , b ; Geetha et al 2022 ) The body's numerous cellular functions produce CO 2 as a metabolic byproduct, and it has some systems to control carbon dioxide levels. (Issitt et al 2022 ) One is an acid–base buffering mechanism that balances carbon dioxide and bicarbonate levels.…”

Section: Introductionmentioning

confidence: 99%

An efficient transition metal chalcogenide sensor for monitoring respiratory alkalosis

et al. 2023

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For many biomedical applications, high-precision CO2 detection with a rapid response is essential. Due to the superior surface-active characteristics, 2D materials are particularly crucial for electrochemical sensors. The liquid phase exfoliation method of 2D Co2Te3 production is used to achieve the electrochemical sensing of CO2. The Co2Te3 electrode performs better than other CO2 detectors in terms of linearity, low detection limit, and high sensitivity. The outstanding physical characteristics of the electrocatalyst, including its large specific surface area, quick electron transport, and presence of a surface charge, can be credited for its extraordinary electrocatalytic activity. More importantly, the suggested electrochemical sensor has great repeatability, strong stability, and outstanding selectivity. Additionally, the electrochemical sensor based on Co2Te3 could be used to monitor respiratory alkalosis.

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Versatile inexpensive paper-based chemosensor to detects trimethylamine: A proof of concept

Cited by 7 publications

References 31 publications

Highly sensitive and selective colorimetric sensing of CO2 for biomedical applications

Highly sensitive and selective colorimetric sensing of CO2 for biomedical applications

A paper-based colourimetric sensor for sodium sulfite detection in beverages

An efficient transition metal chalcogenide sensor for monitoring respiratory alkalosis

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