scholarly journals Highly sensitive amperometric sensing of nitrite utilizing bulk-modified MnO 2 decorated Graphene oxide nanocomposite screen-printed electrodes

2017 ◽  
Vol 227 ◽  
pp. 255-266 ◽  
Author(s):  
Nandita Jaiswal ◽  
Ida Tiwari ◽  
Christopher W. Foster ◽  
Craig E. Banks
Keyword(s):  
Graphene Oxide ◽  
Screen Printed Electrodes ◽  
Highly Sensitive ◽  
Amperometric Sensing ◽  
Screen Printed

Potentiometric Taste Sensing Using Reduced Graphene Oxide Screen Printed Electrodes

2020 ◽  
Vol 18 (12) ◽  
pp. 881-888
Author(s):  
Anil B. Patil ◽  
Umesh. J. Tupe ◽  
Vikas V. Deshmane ◽  
Arun V. Patil
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Principal Component ◽  
Experimental Results ◽  
Statistical Tool ◽  
Sensing Applications ◽  
Screen Printed Electrodes ◽  
Reduced Graphene ◽  
Pharmaceutical Industries ◽  
Screen Printed

This paper reports the development of simple and economical reduced graphene oxide (rGO) based screen-printed electrodes (SPE) for five basic taste sensing applications. Twenty different test solutions for the five tastes of salty, sour, sweet, umami, and bitter at 1 ppm, 10 ppm, 100 ppm, 1000 ppm concentration levels were tested with the fabricated SPEs. From experimental results, electrical signals generated between the electrode and test solution interface were measured using the potentiometric method. Satisfactory potentiometric responses of SPEs to different ppm concentrations for each sample were used to analyze the sample data. Histogram using the statistical tool was used to analyze the changes in the conductivity response. A multivariate Principal Component Analysis (PCA) statistical tool correlated using loading plots between variables and factors of all the five basic tastes. The plot showed the interrelation between variables and test samples. The obtained experimental results from these rGO based SPEs make them suitable for their use in taste sensing applications such as for any taste disorder disability, food-producing industry, pharmaceutical industries, etc.

Raman, X-Ray Fluorescence Spectroscopies and Graphene Oxide Modified Screen Printed Electrodes to Identify the Pigments and Earth Present in Ancient Leather Samples

2017 ◽  
Vol 29 (12) ◽  
pp. 2873-2881 ◽  
Author(s):  
Federica Valentini ◽  
Marina Bicchieri ◽  
Andrea Calcaterra ◽  
Maurizio Talamo
Keyword(s):  
Graphene Oxide ◽  
X Ray ◽  
Screen Printed Electrodes ◽  
Screen Printed

scholarly journals Development of a Magnetic Nanoparticles-Based Screen-Printed Electrodes (MNPs-SPEs) Biosensor for the Quantification of Ochratoxin A in Cereal and Feed Samples

Toxins ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 317 ◽  
Author(s):  
Xian Zhang ◽  
Zuohuan Wang ◽  
Hui Xie ◽  
Renjie Sun ◽  
Tong Cao ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Ochratoxin A ◽  
Limit Of Detection ◽  
Screen Printed Electrodes ◽  
Combined Use ◽  
Highly Sensitive ◽  
Relative Standard ◽  
Liquid Chromatography Tandem Mass ◽  
Feed Samples ◽  
Screen Printed

A rapid and sensitive electrochemical biosensor based on magnetic nanoparticles and screen-printed electrodes (MNPs-SPEs sensor) was developed for the detection of ochratoxin A (OTA) in cereal and feed samples. Different types of magnetic nanoparticles-based ELISA (MNPs-ELISA) were optimized, and the signal detection, as well as sensitivity, was enhanced by the combined use of screen-printed electrodes (SPEs). Under the optimized conditions, the calibration curve of the MNPs-SPEs sensor was y = 0.3372x + 0.8324 (R2 = 0.9805). The linear range of detection and the detection limit were 0.01–0.82 ng/mL and 0.007 ng/mL, respectively. In addition, 50% inhibition (IC50) was detectable at 0.10 ng/mL. The limit of detection (LOD) of this MNPs-SPEs sensor in cereal and feed samples was 0.28 μg/kg. The recovery rates in spiked samples were between 78.7% and 113.5%, and the relative standard deviations (RSDs) were 3.6–9.8%, with the coefficient of variation lower than 15%. Parallel analysis of commercial samples (corn, wheat, and feedstuff) showed a good correlation between MNPs-SPEs sensor and liquid chromatography tandem mass spectrometry (LC/MS-MS). This new method provides a rapid, highly sensitive, and less time-consuming method to determine levels of ochratoxin A in cereal and feedstuff samples.

scholarly journals Applications of Graphene-Based Materials in Sensors

Sensors ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 3196
Author(s):  
Miguel Hernaez
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensors ◽  
Graphene Quantum Dots ◽  
Special Issue ◽  
Mass Sensors ◽  
Screen Printed Electrodes ◽  
Reduced Graphene ◽  
Screen Printed

This Special Issue compiles a set of innovative developments on the use of graphene-based materials in the fabrication of sensors. In particular, these contributions report original studies on a wide variety of sensors, such as gas sensors for NO2 or NH3 detection, antibody biosensors or mass sensors. All these devices have one point in common: they have been built using graphene-based materials like graphene, graphene oxide, reduced graphene oxide, inkject printing graphene, graphene-based composite sponges, graphene screen-printed electrodes or graphene quantum dots.

A Highly Sensitive Non-Enzymatic Urea Sensor Based onNi(OH)2/Mn3O4/rGO/PANi Nanocomposites Using Screen-Printed Electrodes

2021 ◽  
Author(s):  
Saeid Malekinia ◽  
Farshad Kheiri ◽  
Elham Jannatdoust ◽  
Mohammad Sirousazar ◽  
Vahid Abbasi Chianeh
Keyword(s):  
Screen Printed Electrodes ◽  
Highly Sensitive ◽  
Screen Printed
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