Nanocomposite based on restacked crystallites of β-NiS and Ppy for the determination of theophylline and uric acid on screen-printed electrodes

2019 ◽  
Vol 43 (48) ◽  
pp. 19397-19407
Author(s):  
P. Muthukumaran ◽  
R. Ramya ◽  
P. Thivya ◽  
J. Wilson ◽  
G. Ravi
Keyword(s):  
Uric Acid ◽  
Electrocatalytic Activity ◽  
High Sensitivity ◽  
Screen Printed Electrodes ◽  
Screen Printed

We synthesized calcinated β-NiS with a highly crystalline porous nature and mixed it with Ppy to prepare a nanocomposite, which exhibited high electrocatalytic activity and this was then used to detect theophylline and uric acid with high sensitivity and stability.

Simple Strategy for Selective Determination of Levamisole in Seized Cocaine and Pharmaceutical Samples Using Disposable Screen-printed Electrodes

2018 ◽  
Vol 31 (1) ◽  
pp. 153-159 ◽  
Author(s):  
Raquel G. Rocha ◽  
Jéssica S. Stefano ◽  
Iana V. S. Arantes ◽  
Michelle M. A. C. Ribeiro ◽  
Mario H. P. Santana ◽  
...  
Keyword(s):  
Pharmaceutical Samples ◽  
Selective Determination ◽  
Simple Strategy ◽  
Screen Printed Electrodes ◽  
Screen Printed

scholarly journals A dual electro-optical biosensor based on Chlamydomonas reinhardtii immobilised on paper-based nanomodified screen-printed electrodes for herbicide monitoring

2021 ◽  
Author(s):  
Amina Antonacci ◽  
Raouia Attaallah ◽  
Fabiana Arduini ◽  
Aziz Amine ◽  
Maria Teresa Giardi ◽  
...  
Keyword(s):  
Chlamydomonas Reinhardtii ◽  
High Sensitivity ◽  
Optical Biosensor ◽  
Whole Cells ◽  
Screen Printed Electrodes ◽  
And Storage ◽  
High Repeatability ◽  
High Sensitivity Detection ◽  
Screen Printed

Abstract The indiscriminate use of herbicides in agriculture contributes to soil and water pollution, with important endangering consequences on the ecosystems. Among the available analytical systems, algal biosensors have demonstrated to be valid tools thanks to their high sensitivity, cost-effectiveness, and eco-design. Herein, we report the development of a dual electro-optical biosensor for herbicide monitoring, based on Chlamydomonas reinhardtii whole cells immobilised on paper-based screen-printed electrodes modified with carbon black nanomaterials. To this aim, a systematic study was performed for the selection and characterisation of a collection among 28 different genetic variants of the alga with difference response behaviour towards diverse herbicide classes. Thus, CC125 strain was exploited as case study for the study of the analytical parameters. The biosensor was tested in standard solutions and real samples, providing high sensitivity (detection limit in the pico/nanomolar), high repeatability (RSD of 5% with n = 100), long lasting working (10 h) and storage stability (3 weeks), any interference in the presence of heavy metals and insecticides, and low matrix effect in drinking water and moderate effect in surface one.

Determination of Trace Mercury in Saltwaters at Screen-Printed Electrodes Modified with Sumichelate Q10R

1998 ◽  
Vol 10 (15) ◽  
pp. 1017-1021 ◽  
Author(s):  
Paolo Ugo ◽  
Ligia M. Moretto ◽  
Paolo Bertoncello ◽  
Joseph Wang
Keyword(s):  
Screen Printed Electrodes ◽  
Screen Printed
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