Highly selective sensor for the detection of Hg2+ ions using homocysteine functionalised quartz crystal microbalance with cross-linked pyridinedicarboxylic acid.
IET Nanobiotechnol
; 14(7): 563-573, 2020 Sep.
Article
en En
| MEDLINE
| ID: mdl-33010131
ABSTRACT
This study reports an insightful portable vector network analyser (VNA)-based measurement technique for quick and selective detection of Hg2+ ions in nanomolar (nM) range using homocysteine (HCys)-functionalised quartz-crystal-microbalance (QCM) with cross-linked-pyridinedicarboxylic acid (PDCA). The excessive exposure to mercury can cause damage to many human organs, such as the brain, lungs, stomach, and kidneys, etc. Hence, the authors have proposed a portable experimental platform capable of achieving the detection in 20-30â
min with a limit of detection (LOD) 0.1â
ppb (0.498â
nM) and a better dynamic range (0.498â
nM-6.74â
mM), which perfectly describes its excellent performance over other reported techniques. The detection time for various laboratory-based techniques is generally 12-24â
h. The proposed method used the benefits of thin-film, nanoparticles (NPs), and QCM-based technology to overcome the limitation of NPs-based technique and have LOD of 0.1â
ppb (0.1â
µg/l) for selective Hg2+ ions detection which is many times less than the World Health Organization limit of 6â
µg/l. The main advantage of the proposed QCM-based platform is its portability, excellent repeatability, millilitre sample volume requirement, and easy process flow, which makes it suitable as an early warning system for selective detection of mercury ions without any costly measuring instruments.
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Contaminantes Químicos del Agua
/
Nanopartículas del Metal
/
Tecnicas de Microbalanza del Cristal de Cuarzo
/
Oro
/
Homocisteína
/
Iones
/
Mercurio
Tipo de estudio:
Diagnostic_studies
Límite:
Humans
Idioma:
En
Revista:
IET Nanobiotechnol
Asunto de la revista:
BIOTECNOLOGIA
Año:
2020
Tipo del documento:
Article
País de afiliación:
India