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An ion-imprinted material embedded carbon quantum dots for selective fluorometric determination of lithium ion in water samples.
- Source :
-
Microchimica Acta . Dec2017, Vol. 184 Issue 12, p4861-4868. 8p. - Publication Year :
- 2017
-
Abstract
- An ion-imprinted fluorescent polymer (referred to as CQD@SiO@IIP) is presented for recognition of lithium ion. The material is based on the use of carbon quantum dots (CQDs) and is prepared by a surface imprinting technique using benzo-15-crown-5 (B15C5) as the complexing agent, methacrylic acid (MAA) as the functional monomer, ethylene glycol dimethacrylate (EGDMA) as the crosslinker, 2,2-azobisisobutyronitrile (AIBN) as the radical initiator, and lithium ion as the template. After optimization of the detection conditions, the relative fluorescence intensity (F/F), best measured at excitation/emission wavelength of 360 nm/460 nm, varies linearly with the Li concentration in the range between 0.5 and 50 μmol·L, with a limit of detection of 16 μmol·L. Performance was compared to the non-imprinted material, and the imprinting factor is found to be 4.5. The ion-imprinted fluorescence material was applied to the determination of Li in (spiked) water samples and obtained good recoveries ranged from 102 to 111.6%. [ABSTRACT FROM AUTHOR]
- Subjects :
- *QUANTUM dots
*FLUORIMETRY
*LITHIUM ions
*DETECTION limit
*FLUORESCENCE quenching
Subjects
Details
- Language :
- English
- ISSN :
- 00263672
- Volume :
- 184
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Microchimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 126090876
- Full Text :
- https://doi.org/10.1007/s00604-017-2493-8