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Stable and ultrasensitive analysis of organic pollutants and heavy metals by dried droplet method with superhydrophobic-induced enrichment

Authors :
Yanwu Chu
Guobin Zhang
Lianbo Guo
Yuanchao Liu
Zebiao Li
Jie Pan
Condon Lau
Zhenlin Hu
Source :
Analytica Chimica Acta. 1151:338253
Publication Year :
2021
Publisher :
Elsevier BV, 2021.

Abstract

Herein, a dried droplet method (DDM) with superhydrophobic-induced enrichment is reported for stable and ultrasensitive analysis of organic pollutants and heavy metals. A superhydrophobic (SHB) substrate was prepared as an analytical detection platform for the DDM. This SHB substrate was synthesized by sequentially coating polydimethylsiloxane (PDMS) and titanium dioxide nanoparticles (TiO2 NPs) onto glass substrate surface. In the droplet drying process, the SHB substrate was demonstrated to suppress the coffee ring effect (CRE) and enriched analyte concentration. Combining with Raman spectroscopy for analysis of methylene blue (MB), and with laser-induced breakdown spectroscopy (LIBS) for analysis of chromium (Cr), the results indicated high stability and ultra-sensitivity for organic pollutants and heavy metals detection. Overall, the DDM with superhydrophobic-induced enrichment has big potential in applications requiring stable and ultrasensitive analysis.

Details

ISSN :
00032670
Volume :
1151
Database :
OpenAIRE
Journal :
Analytica Chimica Acta
Accession number :
edsair.doi.dedup.....1f118831446de2343ef6d1d0f01b9070
Full Text :
https://doi.org/10.1016/j.aca.2021.338253