access icon free Facile method for detecting C23H25ClN2 in fish using Au nanoparticle films as SERS substrates on glass

Malachite green (C23H25ClN2) is an illegal fungicide of aquatic products due to its potential carcinogenic, teratogenic, and mutagenic effects. It is typically challenging to detect C23H25ClN2 in fish with conventional techniques. The study reported a simple and rapid method for detecting C23H25ClN2 on fish surface with surface-enhanced Raman scattering (SERS). Using the seed growth method with trometamol as the modifier, 110 nm in-diameter gold nanoparticles on thin glass as SERS substrate were prepared, which exhibited high SERS activity, reproducibility, stability, and flexibility in SERS measurement. The fish samples required no pretreatment and the entire measurement took <5 min. Quantitative analyses were also conducted. Excellent linear relationships (R 2 = 0.9397–0.9977) were obtained between the concentrations and the peak intensities of C23H25ClN2 at some characteristic peaks with a wide concentrations range (0.5–10 μM). The detection limit can reach 0.5 μM. This method provided an easy and fast way to detect C23H25ClN2 on fish surface for food safety.

Inspec keywords: organic compounds; chemical variables measurement; aquaculture; glass; surface enhanced Raman scattering; gold; chemical products; chemical sensors; agrochemicals; nanoparticles

Other keywords: surface-enhanced Raman scattering; size 110 nm; seed growth method; Au; aquatic product; glass; mutagenic effect; nanoparticle film; trometamol modifier; SERS substrate; fish; carcinogenic effect; stability; illegal fungicide; Malachite green; teratogenic effect

Subjects: Agriculture; Products and commodities; Measurement; Engineering materials; Instrumentation

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