A new surface molecularly imprinted polyacrylamide nanoprobe for trace Cr(VI) with RRS technique

Yuexing Huang; Li Lin; Youjun Zhang; Aihui Liang; Guiqing Wen; Zhiliang Jiang

doi:10.1016/j.saa.2024.124329

A new surface molecularly imprinted polyacrylamide nanoprobe for trace Cr(VI) with RRS technique

Spectrochim Acta A Mol Biomol Spectrosc. 2024 Apr 23:316:124329. doi: 10.1016/j.saa.2024.124329. Online ahead of print.

Authors

Yuexing Huang¹, Li Lin¹, Youjun Zhang¹, Aihui Liang², Guiqing Wen¹, Zhiliang Jiang³

Affiliations

¹ Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China; Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions, Guilin 541004, China.
² Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China; Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions, Guilin 541004, China. Electronic address: ahliang2008@163.com.
³ Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China; Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions, Guilin 541004, China. Electronic address: zljiang@mailbox.gxnu.edu.cn.

PMID: 38669981
DOI: 10.1016/j.saa.2024.124329

Abstract

This article was used potassium dichromate as the template molecule, silver nanoclusters as the nano matrix, acrylamide as the monomer, ethylene glycol dimethacrylate (EGDMA) as the crosslinking agent, and azodiisobutyronitrile (AIBN) as the initiator to prepare a new silver nanocluster surface MIP (AgNCs@MIP) nanoprobe for chromate. Upon addition of Cr(VI), it selectively adsorbs on the surface of AgNCs@MIP nanoprobes. The dichromate ion absorption peak at 350 nm overlaps with the AgNCs@MIP RRS peak at 370 nm, resulting in strong RRS energy transfer (RRS-ET) and a decrease in the RRS intensity. The decreased RRS intensity is directly proportional to the concentration of dichromate ions in the range of 0.0025-0.015 µmol/L, with a detection limit of 0.8 nmol/L. Therefore, a simple, fast, sensitive and selective RRS method for the determination of trace Cr(VI) in mineral water has been established, with a relative standard deviation of 9.2-9.8 % and recovery of 95.20 %-103.60 %.

Keywords: Acrylamide; Cr(VI); RRS; Silver nanocluster molecularly imprinted polymer nanoprobe.