Modified Screen Printed Electrodes for the Development of Biosensors

Cristea, Cécilia; Bodoki, Ede; Sima, Veronica; Săndulescu, Robert

doi:10.1007/978-3-642-04292-8_20

Cited by 6 publications

(3 citation statements)

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“…The experimental curves showed low background currents related to capacitive effects appearing when screen printed electrodes were immersed in buffer solutions [44]. The background currents were similar for both DRP-150 and DRP-110GPH electrodes.…”

Section: Comparison Between Drp-150 and Drp-110gphmentioning

confidence: 80%

Sensitive Electrochemical Detection Method of Melatonin in Food Supplements

Miccoli¹,

Restani²,

Floroian³

et al. 2018

Rev. Chim.

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Melatonin (N-acetyl-5-methoxytryptamin) is a ubiquitous molecule widely distributed in nature. It is a hormone produced by the pineal gland, which plays a role in the body�s sleep cycles and it is a powerful antioxidant. It is possible to find it in several foods (fruit, rice, corn) and as food supplement. Screen-printed carbon electrode (DRP-150) and graphene modified screen-printed electrode (DRP-110GPH) were tested as sensors for the detection of melatonin using electrochemical detection (differential pulse voltammetry), at different pH values (7.4, 7.0, and 6.4). Quantitative detection of melatonin was possible, with better results when graphene modified screen-printed electrodes were used. The pH influenced the position of the peak as well, with lowering the pH moves more in the right. Both electrodes have been tested on samples of food supplements containing melatonin, with good recovery degrees.

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Section: Comparison Between Drp-150 and Drp-110gphmentioning

confidence: 80%

Sensitive Electrochemical Detection Method of Melatonin in Food Supplements

Miccoli¹,

Restani²,

Floroian³

et al. 2018

Rev. Chim.

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“…17 The background currents were similar for both C-SPE and GPH-SPE. No influence of the chitosan in the CSPE response was observed.…”

Section: Voltammetric Characterization Of Graphene-based Sensormentioning

confidence: 88%

Voltammetric determination of melatonin using a graphene-based sensor in pharmaceutical products

Apetrei

2016

IJN

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Melatonin can be sensitively detected in pharmaceuticals by cyclic voltammetry and fixed-potential amperometry using a graphene-based sensor. The sensor characterization of cyclic voltammetry constantly provides high values of electrode active area and heterogeneous rate constant. In optimal conditions, the sensor was applied for the determination of melatonin in different pharmaceutical samples. The sensitivity to melatonin was 0.0371 A M −1 , and the limit of detection was 0.87×10 −6 M. The data obtained by using the graphene-based sensor for the detection of melatonin in pharmaceutical products were in good agreement with the data provided by the producer. Since no interferences from the excipients were found, using a separation technique was not necessary. Additionally, the low price, ease of handling, small amount of sample, short time per analysis, and possibility of automation are the important advantages that recommend this methodology for quality control of pharmaceuticals.

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“…The screen printing procedure is widely used to fabricate various electrodes for sensors and detectors. 16,17 Moreover, different inks, such as wax, 18 carbon ink, 19 chitosan, 20 and graphene, 21 can be further screen printed on electrodes to form multilayer diagnostic devices. Although screen printing with wax has shown its potential in fabricating PBDDs, 14 a heating post-process is necessary to develop the hydrophobic barriers.…”

Section: Introductionmentioning

confidence: 99%

Screen Printed Paper-based Diagnostic Devices with Polymeric Inks

2015

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A simple and low-cost fabrication method for paper-based diagnostic devices (PBDDs) is described in this study. Streetavailable polymer solutions were screen printed onto filter papers to create hydrophobic patterns for fluidic channels. In order to obtain fully functional hydrophobic patterns for fluids, the original polymer solutions were diluted with butyl acetate to yield a suitable viscosity range between 30 -200 cP for complete patterning on paper. Typical pH and glucose tests with color indicators were performed on the screen printed PBDDs. Images of the PBDDs were analyzed by computers to obtain calibration curves for pH between 2 and 12 and glucose concentration ranging from 10 -1000 mmol dm -3 . Detection of formaldehyde in acetone was also carried out to show the possibility of using this PBBD for analytical detection with organic solvents. An exemplar PBDD with simultaneous pH and glucose detection was also used to demonstrate the feasibility of applying this technique for realistic diagnostic applications.

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Modified Screen Printed Electrodes for the Development of Biosensors

Cited by 6 publications

References 0 publications

Sensitive Electrochemical Detection Method of Melatonin in Food Supplements

Sensitive Electrochemical Detection Method of Melatonin in Food Supplements

Voltammetric determination of melatonin using a graphene-based sensor in pharmaceutical products

Screen Printed Paper-based Diagnostic Devices with Polymeric Inks

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