Portuino—A Novel Portable Low-Cost Arduino-Based Photo- and Fluorimeter

Nonno, Sarah Di; Ulber, Roland

doi:10.3390/s22207916

Cited by 9 publications

(9 citation statements)

References 56 publications

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“…This is favorable for lowbudget spectrometers and fluorescence detectors, as they cannot afford to use sophisticated, but costly, detectors, such as photomultipliers. Usually, small photodiodes 15 , phototransistors 16 or multispectral colorsensors 17 could be used in such cases. For applications along the whole supply chain, the price for the freshness evaluation should be as low as possible, since high prices, could scare off actors from implementing new sensing technology in their product chains.…”

Section: Resultsmentioning

confidence: 99%

Detection of spoiled food along the supply chain with novel sensors for packed food

Altmann,

Khodaygani,

Leucker

et al. 2024

Photonic Technologies in Plant and Agricultural Science

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Along food supply chains, several critical steps can lead to inconsumable food. Especially food of animal origin undergoes rapid aging, when stored inadequately. Quality assessment of packaged food products faces serious problems ranging from the loss of integrity of the package to damage of the food and it is applied only to a low number of samples per batch. As a result, food products are either wasted or not analyzed, which results in a significant decrease in food safety. As a part of an intelligent packaging system, we designed a sensor foil that can detect amines, produced during the food aging process. Change of the fluorescence of the sensor foil can be assessed with spectroscopy or color change from green to red can be detected optically with a camera, e.g. by smartphone. The foil can be incorporated inside the single packaging units and noninvasively measured routinely by the store or consumer. The readout of the foils was performed with steady-state tabletop spectrometers, which were then compared to the results for readouts with different inexpensive handheld devices that could be used during real-life applications, e.g., at any step in a food supply chain. Ideally, the single food product is linked to a single foil at the primary producer, measuring the first spectrum and connecting the data to the specific product, e.g. via distributed ledger. For a transparent process chain, QR-codes could be utilized to allow access to the freshness data along the shelf life of a single package.

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Section: Resultsmentioning

confidence: 99%

Detection of spoiled food along the supply chain with novel sensors for packed food

Altmann,

Khodaygani,

Leucker

et al. 2024

Photonic Technologies in Plant and Agricultural Science

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“…A portable analysis system, as described earlier [47], was used for transmission measurements to simplify the wine color determination. The measurement chamber (Figure 1) was 3D-printed in black acrylonitrile butadiene styrene (ABSplusTM, Stratasys GmbH, Frankfurt am Main, Germany).…”

Section: Portable Analysis System 241 Measurement Chambermentioning

confidence: 99%

“…The measurement principle is based on the discharge of a capacitor by the photocurrent of the phototransistor, and the discharge time is correlated with light intensity and thus with the transmission of a sample. The in-detail description of the circuit was described earlier [47]. The LEDs and the phototransistor are placed in LED inserts by LED mounting clips (Figure 1(B1)).…”

Section: Portable Analysis System 241 Measurement Chambermentioning

confidence: 99%

Specification and Simplification of Analytical Methods to Determine Wine Color

et al. 2022

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The color of wine is an important quality parameter essential for the first impression of consumers. The International Organization of Vine and Wine (OIV) recommends two methods to describe wine color: color calculation according to Glories and the determination of coordinates in the CIE L*a*b* color space. The measurement of wine color is often not feasible for winemakers because the required instrumentation is expensive and bulky. In this study, the influence of photometer settings on the calculated color was investigated based on 14 wines. Furthermore, the CIE L*a*b* and Glories system were compared using 56 red and 56 white wines. Photometer settings were found to influence the reproducibility of color determination. In addition, CIE L*a*b* system do not correlate in all wines with the Glories system and Glories probably provides less information about wine color. Using interpolation, CIE L*a*b* coordinates were calculated from single wavelength measurements taken by a small-sized and inexpensive portable analysis system, which could be used by winemakers in the future.

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“…It could be more beneficial to construct devices for specific uses, instead of developing universal instruments. However, these universal systems are based on low-cost electronics (such as Arduino NANO or UNO boards) but use costly detectors to establish sensitivity to various analytes with different spectral characteristics [ 21 , 22 , 23 , 24 ]. Low-cost electronics designed for specific uses may help build a foundation for novel applications using the Internet of (Analytical) Things [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Open Meter Duo: Low-Cost Instrument for Fluorimetric Determination of Cholinesterase Activity

Keresteš,

Mozo,

Pohanka

2024

Sensors

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Environmental screening is essential due to the increased occurrence of harmful substances in the environment. Open Meter Duo (OMD) is an open-source field photo/fluorimeter that uses an RGB diode that imitates a color according to the selected wavelength and uses a UV LED from the security kit diode as an excitation light source. The prepared PCB shield with a 3D-printed aperture was connected to Arduino UNO R4 WiFi. This system was used for the fluorescent detection of cholinesterase activity with the indoxyl acetate method. Carbofuran—a toxic pesticide—and donepezil—a drug used to treat Alzheimer’s disease—were tested as model inhibitors of cholinesterase activity. The limit of detection of indoxyl acetate was 11.6 μM, and the IC50 values of the inhibitors were evaluated. This system is optimized for wireless use in field analysis with added cloud support and power source. The time of analysis was 5 min for the fluorimetric assay and 20 min for the optional photometric assay. The time of field operation was approximately 4 h of continuous measurement. This system is ready to be used as a cheap and easy control platform for portable use in drug control and point-of-care testing.

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Portuino—A Novel Portable Low-Cost Arduino-Based Photo- and Fluorimeter

Cited by 9 publications

References 56 publications

Detection of spoiled food along the supply chain with novel sensors for packed food

Detection of spoiled food along the supply chain with novel sensors for packed food

Specification and Simplification of Analytical Methods to Determine Wine Color

Open Meter Duo: Low-Cost Instrument for Fluorimetric Determination of Cholinesterase Activity

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