scholarly journals An Analytical Method Based on Electrochemical Sensor for the Assessment of Insect Infestation in Flour

Biosensors ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 325
Author(s):  
Li Fu ◽  
Jiangwei Zhu ◽  
Hassan Karimi-Maleh
Keyword(s):  
Uric Acid ◽  
Analytical Method ◽  
Professional Training ◽  
Field Analysis ◽  
Insect Infestation ◽  
Important Indicator ◽  
Highly Sensitive ◽  
Other Substances ◽  
Highly Sensitive Detection ◽  
Electrocatalytic Reaction

Uric acid is an important indicator of the insect infestation assessment in flour. In this work, we propose a method for uric acid detection based on voltammetry. This technique is particularly considered for the physicochemical properties of flour and contains a simple pretreatment process to rapidly achieve extraction and adsorption of uric acid in flour. To achieve specific recognition of uric acid, graphene and poly(3,4-ethylenedioxythiophene) (PEDOT) were used for the adsorption and concentration of uric acid in flour. The adsorbed mixture was immobilized on the surface of a screen-printed electrode for highly sensitive detection of the uric acid. The results showed that electrocatalytic oxidation of uric acid could be achieved after adsorption by graphene and PEDOT. This electrocatalytic reaction allows its oxidation peak to be distinguished from those of other substances that commonly possess electrochemical activity. This voltammetry-based detection method is a portable and disposable analytical method. Because it is simple to operate, requires no professional training, and is inexpensive, it is a field analysis method that can be promoted.

Plasmonic Paper based Flexible SERS Biosensor for Highly Sensitive Detection of Lactic and Uric Acid

2021 ◽  
pp. 1-1
Author(s):  
M. Verma ◽  
Tania K. Naqvi ◽  
Santosh K. Tripathi ◽  
Manish M. Kulkarni ◽  
N. Eswara Prasad ◽  
...  
Keyword(s):  
Uric Acid ◽  
Sensitive Detection ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Plasmonic Paper

Electrocatalytic activity of C-dots for highly sensitive detection of Uric acid

2019 ◽  
Vol 14 ◽  
pp. 545-552
Author(s):  
T. Dhanasekaran ◽  
A. Padmanaban ◽  
G. Gnanamoorthy ◽  
S. Praveen Kumar ◽  
A. Stephen ◽  
...  
Keyword(s):  
Uric Acid ◽  
Electrocatalytic Activity ◽  
Sensitive Detection ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

A New ESIPT-Based Fluorescent Probe for the Highly Sensitive Detection of Amine Vapors

2021 ◽  
Author(s):  
Cheng Bao ◽  
Sufang Shao ◽  
Haifeng Zhou ◽  
Yifeng Han
Keyword(s):  
Fluorescent Probe ◽  
Health Problems ◽  
Sensitive Detection ◽  
Important Indicator ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

Volatile amine vapors are toxic and corrosive irritants and can cause serious health problems. In addition, the biologically amine vapor produced by microorganisms is also an important indicator of food...

A Novel Enzyme-Free Biosensor Based on Porous Core–Shell Metal Organic Frame Nanocomposites Modified Electrode for Highly Sensitive Detection of Uric Acid and Dopamine

2019 ◽  
Vol 15 (7) ◽  
pp. 1443-1453 ◽  
Author(s):  
Ruiqi Qiu ◽  
Qiu Xu ◽  
Hui Jiang ◽  
Xuemei Wang
Keyword(s):  
Uric Acid ◽  
Porous Metal ◽  
Differential Pulse ◽  
Nitrogen Atmosphere ◽  
Core Shell ◽  
Highly Sensitive ◽  
Growth Method ◽  
Metal Organic ◽  
Highly Sensitive Detection ◽  
Hybrid Carbon Materials

A novel enzyme-free biosensor based on porous metal organic frame nanocomposites, i.e., core–shell structured Au@NC@GC nanocomposites, has been constructed for simultaneous determination of uric acid (UA) and dopamine (DA). Au@ZIF-8@ZIF-67 was prepared through a seed-mediated growth method and carbonized in nitrogen atmosphere to synthesize a nanoporous hybrid carbon materials (Au@NC@GC). Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) studies demonstrate that the as-prepared Au@NC@GC modified glassy carbon electrode (Au@NC@GC-GCE) possesses a high selectivity and sensitivity for simultaneous detections of UA and DA. It exhibited wide linear responses for UA and DA in the range from 10 μM to 600 μM and 10 μM to 150 μM, with the detection limits of 0.773 nM and 0.746 nM, respectively (S/N = 3). Moreover, this novel electrochemical biosensor could be further utilized in biological analysis (i.e., human serum), and the satisfactory recovery results of UA and DA could be readily obtained. These afore-mentioned results further manifest that the as-prepared biosensors are capable for quantitatively monitoring UA and DA in serum, verifying the possibility for its future promising applications in real biological or clinic samples analysis.

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