An ultrasensitive fluorescence sensor for determination of trace levels of copper in blood samples.
Anal Bioanal Chem
; 411(21): 5593-5603, 2019 Aug.
Article
in En
| MEDLINE
| ID: mdl-31289896
ABSTRACT
A novel SBA-15-based fluorescent sensor, SBA-PI mesoporous SBA-15 structure modified with iminostilbene groups, was designed, synthesized, and characterized by Fourier transform-infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), thermogravimetric analysis (TGA), low-angle X-ray diffraction techniques (low-angle XRD), and N2 adsorption-desorption techniques. The SBA-PI as a sensor with a selective behavior for detection of Cu2+ comprises iminostilbene carbonyl as the fluorophore group. The SBA-PI sensor displays an excellent fluorescence response in aqueous solutions and the fluorescence intensity quenches remarkably upon addition of Cu2+. Other common interfering ions even at high concentration ratio showed either no or very small changes in the fluorescence intensity of SBA-PI in the absence of Cu2+. A limit of detection of 8.7 × 10-9 M for Cu2+ indicated that this fluorescence sensor has a high sensitivity and selectivity toward the target copper (II) ion. The fabricated Cu2+ sensor was successfully applied for the determination of the Cu2+ in human blood samples without any significant interference. With the selective analysis of Cu2+ ions down to 0.9 nM in blood, the sensor is a promising and a novel detection candidate for Cu2+ and can be applied in the clinical laboratory. A reversibility and accuracy in the fluorescence behavior of the sensor was found in the presence of I¯ that was described as a masking agent for Cu2+. Graphical abstract.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Trace Elements
/
Spectroscopy, Fourier Transform Infrared
/
Copper
Limits:
Humans
Language:
En
Journal:
Anal Bioanal Chem
Year:
2019
Type:
Article
Affiliation country:
Iran