Green optical dissolved oxygen sensor based on a chlorophyll–zinc complex extracted from the plant Brassica oleracea L

Silva, Erandir Brasil; Pinto, Paulo; Chretien, Jécol Bamutsha; Miranda, João Isaac Silva; Pinho, Hilton Andrade; Timbó, Átila Pereira; Fraga, W. B.; Menezes, Jaileila de Araújo; Silva, Marcos Erick Rodrigues; Guimarãres, Glendo de Freitas

doi:10.1364/ao.56.009951

Cited by 7 publications

(3 citation statements)

References 19 publications

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“…In addition, environmental concerns led researchers to focus on the use of green materials. Silva et al extracted chlorophyll A from cabbage and combined it with zinc to form a complex, which was used in an optical sensor with high sensitivity, and the R 2 of fluorescence intensity and voltage inhibition reached 0.9809 [111]. The principle of optical oxygen sensors is the oxygen-quenching effect of the fluorescence of the luminescent molecules (luminescent body) fixed in the matrix; thus, the choice of substrate material is also an important factor impacting the performance of the sensor.…”

Section: Dissolved Oxygen Detection Technologiesmentioning

confidence: 99%

Review of Dissolved Oxygen Detection Technology: From Laboratory Analysis to Online Intelligent Detection

Wei

Jiao

et al. 2019

Sensors

127

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Dissolved oxygen is an important index to evaluate water quality, and its concentration is of great significance in industrial production, environmental monitoring, aquaculture, food production, and other fields. As its change is a continuous dynamic process, the dissolved oxygen concentration needs to be accurately measured in real time. In this paper, the principles, main applications, advantages, and disadvantages of iodometric titration, electrochemical detection, and optical detection, which are commonly used dissolved oxygen detection methods, are systematically analyzed and summarized. The detection mechanisms and materials of electrochemical and optical detection methods are examined and reviewed. Because external environmental factors readily cause interferences in dissolved oxygen detection, the traditional detection methods cannot adequately meet the accuracy, real-time, stability, and other measurement requirements; thus, it is urgent to use intelligent methods to make up for these deficiencies. This paper studies the application of intelligent technology in intelligent signal transfer processing, digital signal processing, and the real-time dynamic adaptive compensation and correction of dissolved oxygen sensors. The combined application of optical detection technology, new fluorescence-sensitive materials, and intelligent technology is the focus of future research on dissolved oxygen sensors.

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Section: Dissolved Oxygen Detection Technologiesmentioning

confidence: 99%

Review of Dissolved Oxygen Detection Technology: From Laboratory Analysis to Online Intelligent Detection

Wei

Jiao

et al. 2019

Sensors

127

View full text Add to dashboard Cite

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“…Concerned with the use of nonrenewable transition metal complexes in quenching DO sensors, Silva et al [12] derived transition metal complexes from kale using extraction, acidification, and complexation techniques to target chlorophyll A molecules in the kale and substitute magnesium with zinc ions. The extracted transition metal chlorophyllzinc complexes were immobilized in a thin film of sol-gel, as per standard procedure for the construction of quenching DO complexes.…”

Section: Utilization Of Light Waves For Measuring Do In Watermentioning

confidence: 99%

DOxy: A Dissolved Oxygen Monitoring System

Shaghaghi,

Fazlollahi,

Shrivastav

et al. 2024

Sensors

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Dissolved Oxygen (DO) in water enables marine life. Measuring the prevalence of DO in a body of water is an important part of sustainability efforts because low oxygen levels are a primary indicator of contamination and distress in bodies of water. Therefore, aquariums and aquaculture of all types are in need of near real-time dissolved oxygen monitoring and spend a lot of money on purchasing and maintaining DO meters that are either expensive, inefficient, or manually operated—in which case they also need to ensure that manual readings are taken frequently which is time consuming. Hence a cost-effective and sustainable automated Internet of Things (IoT) system for this task is necessary and long overdue. DOxy, is such an IoT system under research and development at Santa Clara University’s Ethical, Pragmatic, and Intelligent Computing (EPIC) Laboratory which utilizes cost-effective, accessible, and sustainable Sensing Units (SUs) for measuring the dissolved oxygen levels present in bodies of water which send their readings to a web based cloud infrastructure for storage, analysis, and visualization. DOxy’s SUs are equipped with a High-sensitivity Pulse Oximeter meant for measuring dissolved oxygen levels in human blood, not water. Hence a number of parallel readings of water samples were gathered by both the High-sensitivity Pulse Oximeter and a standard dissolved oxygen meter. Then, two approaches for relating the readings were investigated. In the first, various machine learning models were trained and tested to produce a dynamic mapping of sensor readings to actual DO values. In the second, curve-fitting models were used to produce a successful conversion formula usable in the DOxy SUs offline. Both proved successful in producing accurate results.

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“…Other natural dyes such as chlorophyll and β-carotene might be also relevant for sensing since both structures are highly sensitive to oxidative species. Silva et al (2017) showed that replacing the coordinated Mg 2+ with Zn 2+ in chlorophyll A, the fluorescence of the complex is faded when increasing the concentration of dissolved oxygen in the medium. The mechanism of luminescence suppression is suggested to be caused by an energy transfer to oxygen molecules that collide with the excited molecule.…”

Section: Bio-based Sensorsmentioning

confidence: 99%

Bio-Based Smart Materials for Food Packaging and Sensors – A Review

et al. 2020

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Food industry must guarantee food safety and seek sustainable solutions for increasing shelf life and decreasing food waste. Bio-based smart packaging is a potential option, where sustainability and real-time monitoring of food quality are combined assuring health safety and providing economic and environmental benefits. In this context, biobased refers not only to packaging materials that are from renewable sources and biodegradable, but also to the sensor elements. The scope of this review is to explore the state-of-the-art of bio-based polymers used as food contact materials and to highlight the potential of natural compounds for sensing chemical and physical changes of the environment to monitor the food quality. Finally, different sustainability aspects of the bio-based materials are discussed.

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Green optical dissolved oxygen sensor based on a chlorophyll–zinc complex extracted from the plant Brassica oleracea L

Cited by 7 publications

References 19 publications

Review of Dissolved Oxygen Detection Technology: From Laboratory Analysis to Online Intelligent Detection

Review of Dissolved Oxygen Detection Technology: From Laboratory Analysis to Online Intelligent Detection

DOxy: A Dissolved Oxygen Monitoring System

Bio-Based Smart Materials for Food Packaging and Sensors – A Review

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