Contamination- and Perturbation-Free Fluorescent Monitoring of Zn2+ in Suspensions Using Crown Ether-Functionalized Magnetic Nanoparticles

被引：0

作者：

Vezse, Panna ^{[1
]}

Golcs, Adam ^{[1
,2
]}

Toth, Tunde ^{[1
,3
]}

Huszthy, Peter ^{[1
]}

机构：

[1] Budapest Univ Technol & Econ, Dept Organ Chem & Technol, Szent Gellert Ter 4, H-1111 Budapest, Hungary

[2] Semmelweis Univ, Dept Pharmaceut Chem, Hogyes Endre Utca 9, H-1092 Budapest, Hungary

[3] Ctr Energy Res, Konkoly Thege Mikl Ut 29-33, H-1121 Budapest, Hungary

来源：

CHEMOSENSORS | 2023年 / 11卷 / 10期

关键词：

magnetic nanoparticle; fluorescence; zinc; molecular recognition; CHEMOSENSOR; IONS; EFFICIENT; ZINC; SELECTIVITY; PHASE; PROBE; DOTS; CD2+;

D O I：

10.3390/chemosensors11100547

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This study aims to introduce a fluorescence-based chemosensing method for Zn2+ in aqueous suspensions and untreated surface waters, conditions which generally hinder the application of conventional optochemical sensing platforms. A macrocyclic fluoroionophore was covalently bonded to a silica-coated magnetic nanoparticle and applied according to a predetermined protocol for analyzing trace amounts of Zn2+ under rarely investigated conditions. Utilizing the reversible complexation of the immobilized fluoroionophore, rapid regeneration was carried out via simple acidification after the magnetic-assisted solid-phase extraction of the particles. Forming inclusion complexes with Zn2+ with the receptor units of the particles leads to a significant enhancement in fluorescence intensity at 370 nm, above the detection limit of 5 ppb, with a dynamic linear range of quantification of 15-3000 ppb in a pH range of 5.5-7.5. Practical applicability was confirmed by analyzing untreated river water and an aqueous suspension of pumpkin seed flour as real and relevant heterogeneous multicomponent samples of predetermined sample composition and natural Zn2+ content. Our practical approach aims to broaden the applicability range of optochemical sensing platforms for Zn2+.

引用

页数：17