Jump to main content
Jump to site search

Issue 7, 2020
Previous Article Next Article

Dual channel ion imprinted fluorescent polymers for dual mode simultaneous chromium speciation analysis

Author affiliations

Abstract

A simple core shell structured fluorescent sensor was constructed to realize simultaneous detection of hexavalent and trivalent chromium ions. Briefly, blue-carbon dots (b-CDs) were embedded into a silica sphere, then a Cr(III) imprinted silica layer doped with red-CDs (r-CDs) was coated onto the b-CDs@SiO2. Cr(VI) can selectively quench b-CDs based on the inner filter effect and Cr(III) can selectively quench r-CDs based on electron transfer with the aid of the ion imprinting technique. In this strategy, it was not necessary to reduce Cr(VI) to Cr(III) or oxidize Cr(III) to Cr(VI), the chromium speciation of both can be detected simultaneously. When Cr(VI) was detected in the blue channel, the fluorescence intensity quenching effect was seen at 440 nm, and was linear from 0.01 to 10.0 μM, with a detection limit of 3.8 nM. For the detection of Cr(III) in the red channel, the fluorescence intensity quenching effect was seen at 605 nm, and was linear from 0.1 to 15.0 μM, with a detection limit of 46 nM. This strategy enjoyed the advantages of simple construction, convenient detection, good selectivity and high sensitivity.

Graphical abstract: Dual channel ion imprinted fluorescent polymers for dual mode simultaneous chromium speciation analysis

Back to tab navigation

Supplementary files

Article information


Submitted
15 Jan 2020
Accepted
18 Feb 2020
First published
22 Feb 2020

Analyst, 2020,145, 2661-2668
Article type
Paper

Dual channel ion imprinted fluorescent polymers for dual mode simultaneous chromium speciation analysis

H. Lu and S. Xu, Analyst, 2020, 145, 2661
DOI: 10.1039/D0AN00098A

Social activity

Search articles by author

Spotlight

Advertisements