scholarly journals Comparison between a Direct-Flow SPR Immunosensor for Ampicillin and a Competitive Conventional Amperometric Device: Analytical Features and Possible Applications to Real Samples

Sensors ◽  
2017 ◽  
Vol 17 (4) ◽  
pp. 819 ◽  
Author(s):  
Mauro Tomassetti ◽  
Giovanni Merola ◽  
Elisabetta Martini ◽  
Luigi Campanella ◽  
Gabriella Sanzò ◽  
...  
Keyword(s):  
Direct Flow ◽  
Real Samples ◽  
Spr Immunosensor

Development of a reusable protein G based SPR immunosensor for direct human growth hormone detection in real samples

2015 ◽  
Vol 7 (23) ◽  
pp. 9875-9884 ◽  
Author(s):  
A. Makaraviciute ◽  
A. Ramanavicius ◽  
A. Ramanaviciene
Keyword(s):  
Growth Hormone ◽  
Human Serum ◽  
Human Growth Hormone ◽  
Human Growth ◽  
Serum Analysis ◽  
Protein G ◽  
Antibody Immobilization ◽  
Real Samples ◽  
Spr Immunosensor

The manuscript focuses on investigating some points in employing protein G based antibody immobilization for the development of a reusable SPR immunosensor aimed at human growth hormone detection in real samples. Following our findings a model immunosensor was developed, tested and adapted for human serum analysis.

scholarly journals Noval Dual-Emission Fluorescence Carbon Dots as a Ratiometric Probe for Cu2+ and ClO− Detection

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1232
Author(s):  
Jiaqing Guo ◽  
Aikun Liu ◽  
Yutian Zeng ◽  
Haojie Cai ◽  
Shuai Ye ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Background Noise ◽  
Good Recovery ◽  
Ratiometric Fluorescence ◽  
Dual Emission ◽  
Simple Method ◽  
Real Samples ◽  
Nitrogen Doped ◽  
Probe Concentration ◽  
Ratiometric Probe

The use of carbon dots (CDs) with dual emission based on ratiometric fluorescence has been attracting attention in recent times for more accurate ion detection since they help avoid interference from background noise, probe concentration, and complexity. Herein, novel dual-emission nitrogen-doped CDs (NCDs) were prepared by a simple method for Cu2+ and ClO- detection. The NCDs showed excellent anti-interference ability and selectivity for different emissions. In addition, a good linear relationship was observed between the fluorescence intensity (FI) of the NCD solutions in different emissions with Cu2+ (0–90 μM) and ClO- (0–75 μM). The limits of both Cu2+ detection and ClO- were very low, at 17.7 and 11.6 nM, respectively. The NCDs developed herein also showed a good recovery rate in water for Cu2+ and ClO− detection. Hence, they are expected to have a more extensive application prospect in real samples.

Miniaturized PMMA Electrochemical Platform With Carbon Fiber for Multiplexed and Noninterfering Biosensing of Real Samples

2020 ◽  
pp. 1-6
Author(s):  
Jaligam Murali Mohan ◽  
Khairunnisa Amreen ◽  
Arshad Javed ◽  
Satish Kumar Dubey ◽  
Sanket Goel
Keyword(s):  
Carbon Fiber ◽  
Real Samples

scholarly journals Applicability of Cork as Novel Modifiers to Develop Electrochemical Sensor for Caffeine Determination

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 37
Author(s):  
Mayra K. S. Monteiro ◽  
Djalma R. Da Silva ◽  
Marco A. Quiroz ◽  
Vítor J. P. Vilar ◽  
Carlos A. Martínez-Huitle ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Linear Response ◽  
High Performance ◽  
Low Cost ◽  
Pharmaceutical Formulations ◽  
Caffeine Concentration ◽  
Real Samples ◽  
Wide Range ◽  
Potential Use

This study aims to investigate the applicability of a hybrid electrochemical sensor composed of cork and graphite (Gr) for detecting caffeine in aqueous solutions. Raw cork (RAC) and regranulated cork (RGC, obtained by thermal treatment of RAC with steam at 380 °C) were tested as modifiers. The results clearly showed that the cork-graphite sensors, GrRAC and GrRGC, exhibited a linear response over a wide range of caffeine concentration (5–1000 µM), with R2 of 0.99 and 0.98, respectively. The limits of detection (LOD), estimated at 2.9 and 6.1 µM for GrRAC and GrRGC, suggest greater sensitivity and reproducibility than the unmodified conventional graphite sensor. The low-cost cork-graphite sensors were successfully applied in the determination of caffeine in soft drinks and pharmaceutical formulations, presenting well-defined current signals when analyzing real samples. When comparing electrochemical determinations and high performance liquid chromatography measurements, no significant differences were observed (mean accuracy 3.0%), highlighting the potential use of these sensors to determine caffeine in different samples.

Highly selective detection of isatin using curcumin analogue and its application in real samples

2021 ◽  
Vol 411 ◽  
pp. 113192
Author(s):  
Appadurai Deepa ◽  
Venkatesan Srinivasadesikan ◽  
Shyi-Long Lee ◽  
Vediappen Padmini
Keyword(s):  
Selective Detection ◽  
Real Samples ◽  
Curcumin Analogue

scholarly journals Selective Membrane Sensor for Aluminum Determination in Food Products, Real Samples and Standard Alloys

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 504
Author(s):  
Sabry Khalil ◽  
Ashraf Y. Elnaggar
Keyword(s):  
Liquid Membrane ◽  
Food Products ◽  
Ion Selective Electrodes ◽  
Real Samples ◽  
Membrane Sensor ◽  
Aluminum Ion ◽  
Electrode Response ◽  
Aluminum Ions ◽  
Selective Membrane ◽  
Ph Range

The study involves the fabrication of an aluminum liquid membrane sensor based on the association of aluminum ions with the cited reagent 2,9-dimethyl-4,11-diphenyl -1,5,8,12-tetraaza cyclote tradeca-1,4,8,11-tetraene [DDTCT]. The characteristics slope (58 mV), rapid and linear response for aluminum ion was displayed by the proposed sensor within the concentration range 2.5 × 10−7–1.5 × 10−1 M, the detection limit (1.6 × 10−7) M, the selectivity behavior toward some metal cations, the response time 10 s), lifetime (150 days), the effect of pH on the suggested electrode potential and the requisite analytical validations were examined. The suitable pH range was (5.0–8.0 ), in this range the proposed electrode response is independent of pH. The suggested electrode was applied to detect the aluminum ions concentration in food products, real samples and standard alloys. The resulting data by the suggested electrode were statistically analyzed, and compared with the previously reported aluminum ion-selective electrodes in the literature.

Green synthesis of silver nanoparticles: Antimicrobial potential and chemosensing of a mutagenic drug nitrofurazone in real samples

Measurement ◽  
2021 ◽  
pp. 109489
Author(s):  
Shah Rizwan Ahmed ◽  
Humera Anwar ◽  
Syed Waseem Ahmed ◽  
Muhammed Raza Shah ◽  
Ayaz Ahmed ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Real Samples ◽  
Antimicrobial Potential
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