Development and evaluation of a surface-enhanced Raman scattering (SERS) method for the detection of the antioxidant butylated hydroxyanisole |
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Authors: | Weirong Yao Yingying Sun Yunfei Xie Shitao Wang Lijun Ji Heya Wang He Qian |
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Affiliation: | (1) State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, Jiangsu, China |
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Abstract: | Butylated hydroxyanisole (BHA) is a common antioxidant used in foods and food packaging materials, and it can migrate into
the food during its supply chain. BHA has been shown to be carcinogenic, which has gained substantial attention in recent
years. In this study, the feasibility of using surface-enhanced Raman scattering (SERS) coupled with SERS-active gold substrates
for rapid detection of trace amounts of BHA was investigated. Raman signals of tested samples were enhanced significantly
by SERS. The detection limit of the BHA solution can reach 10 μg/mL by SERS enhanced with 50 nm gold nanoparticles and in
a 1.0 pH solution system. The Raman peak at 480 cm−1 was used as the index of quantitative analysis, the line correlation was R
2 = 0.9803. The results showed that the SERS method is useful for sensitive and selective detection of BHA. By comparing the
enhanced peak features, the adsorption behavior of BHA on the surface of gold nanoparticles was analyzed in detail and it
was determined that the molecule was adsorbed on the gold surface by “Ph-O(H) (Ph = phenyl)”. The benzene ring vibration increased
significantly, inferring that the benzene ring is perpendicular to the surface of the gold nanoparticles. |
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