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Ion inducing surface interaction for improved SERS detection of melamine in fertilizer and soil
Author(s) -
Guo Xiaoyu,
Wu Yiping,
Ying Ye,
Wen Ying,
Wang Feng,
Ke Qinfei,
Yang Haifeng
Publication year - 2018
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.5266
Subject(s) - melamine , raman scattering , chemistry , raman spectroscopy , detection limit , ion , molecule , micelle , analytical chemistry (journal) , inorganic chemistry , materials science , chromatography , organic chemistry , aqueous solution , physics , optics
Ultra‐sensitive platform for surface‐enhanced Raman scattering detecting trace melamine is constructed by adding Fe 3+ ions. In this work, first, inositol hexaphosphate (IP 6 ) micelle capped silver nanoparticles (IP 6 @AgNPs) is synthesized. Taking advantage of the strong interaction of Fe 3+ and IP 6 micelle, surface‐enhanced Raman scattering activity of IP 6 @AgNPs could be improved by formation of more “hot spots” induced by rational addition of due amount Fe 3+ . Second, IP 6 @AgNPs binding Fe 3+ could offer the anchoring sites to capture melamine molecules due to containing NH group and/or N atom. Such Fe 3+ acted as dual functions is beneficial to elevating sensitivity of determining trace melamine in water, fertilizer, and soil samples with the limits of detection about 1.26, 1.26, and 63.0 ppb, respectively. This proposed assay based on a portable Raman system could monitor real samples without complicated pretreatment, which is perspective to inspect trace melamine on‐field in water and soil environment.