Determination of organophosphate pesticides at a carbon nanotube/organophosphorus hydrolase electrochemical biosensor

2005 ◽  
Vol 530 (2) ◽  
pp. 185-189 ◽  
Author(s):  
Randhir Prakash Deo ◽  
Joseph Wang ◽  
Ines Block ◽  
Ashok Mulchandani ◽  
Kanchan A. Joshi ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Electrochemical Biosensor ◽  
Organophosphorus Hydrolase ◽  
Organophosphate Pesticides

Label-free Electrochemical Biosensor Based on Graphene/Ionic Liquid Nanocomposite for the Detection of Organophosphate Pesticides

2011 ◽  
Vol 1283 ◽  
Author(s):  
Tae Jung Park ◽  
MinHo Yang ◽  
Bong Gill Choi ◽  
Nam Su Heo ◽  
Seok Jae Lee ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Graphene Oxide ◽  
High Performance ◽  
Electrochemical Biosensor ◽  
Modified Electrodes ◽  
Organophosphorus Hydrolase ◽  
Organophosphate Pesticides ◽  
Label Free ◽  
Au Electrode ◽  
Reduced Graphene

ABSTRACTThe advanced electrodes for detecting organophosphate pesticides were prepared by modification of the gold (Au) electrode with the reduced graphene oxide/ionic liquid (RGO/IL) nanohybrids. Due to the cationic and anionic parts, the ILs on RGO sheets provide the amount of functional groups for dispersion of hybrids and immobilization of organophosphorus hydrolase (OPH) enzymes. After the immobilization of OPH on the RGO/IL-modified Au electrodes, the modified electrodes represent faster electron transfer than that of Au electrode, resulting in high performance of biosensor with response time (~ 10 s) and sensitivity (4.56 nA μM−1). In addition, the OPH/RGO/IL-modified Au electrode displayed good stability and reproducibility.

Multiwall carbon nanotube ensembled biopolymer electrode for selective determination of isoniazid in vitro

2014 ◽  
Vol 6 (11) ◽  
pp. 3772-3778 ◽  
Author(s):  
M. Satyanarayana ◽  
K. Koteshwara Reddy ◽  
K. Vengatajalabathy Gobi
Keyword(s):  
Carbon Nanotube ◽  
Electrochemical Biosensor ◽  
Urine Samples ◽  
Multiwall Carbon Nanotube ◽  
Selective Determination ◽  
Artificial Urine ◽  
Sensitive Determination ◽  
Multiwall Carbon

A reagent-free electrochemical biosensor is fabricated for the sensitive determination of the important anti-tubercular drug isoniazid directly from spiked drug formulations and undiluted artificial urine samples.

Ratiometric Electrochemical Biosensor for the Sensitive Determination of DNA by a Hairpin DNA Probe

2021 ◽  
pp. 1-11
Author(s):  
Haixia Wang ◽  
Xuejiao Wang ◽  
Mingyuan Zhao ◽  
Chao Shi ◽  
Cuiping Ma
Keyword(s):  
Electrochemical Biosensor ◽  
Dna Probe ◽  
Hairpin Dna ◽  
Sensitive Determination
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