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- Title
Flexible graphene oxide/Ag SERS substrate and its applications for ultrasensitive detection of florfenicol residues in milk.
- Authors
Li, Xiaodi; Zhou, Hualan; Wang, Lehui; Wang, Huiwen; Cong, Wenjie; Wang, Mingxuan; Zhang, Jianguo
- Abstract
Extensively employed antibiotics in livestock cause residue in food products that would threaten public health safety. In this work, we have developed a flexible, sensitive, cost-effective graphene oxide (GO)/silver–polyester fibrous membrane (PFM) flexible SERS substrate (GO–Ag–PFM) which is suitable for in situ food safety detection. PFMs built nanoporous networks as a flexible template, while GO–Ag nanomaterials were precipitated on the crossed fibers by self-assembly techniques, providing a density "hot-spot" that significantly increased electromagnetic fields. The lowest distinguishable level of rhodamine 6G is 10−9 mol/L, and the flexible SERS substrates also exhibit good uniformity and reproducibility. The sensitive GO–Ag–PFM flexible SERS substrates achieve low-level SERS detection of florfenicol (FF). The estimated LOD is low to 2.46 × 10−9 mol/L for FF. The proposed method can be applied to the determination of FF residues in milk. The recoveries were 89–98% with a relative standard deviation of 4.5–9.1%, which is expected to show great potential in food safety testing.
- Subjects
GRAPHENE oxide; FOOD safety; FOOD testing; ELECTROMAGNETIC fields; MILK; NANOPOROUS materials
- Publication
Research on Chemical Intermediates, 2023, Vol 49, Issue 11, p5083
- ISSN
0922-6168
- Publication type
Article
- DOI
10.1007/s11164-023-05122-3