TITLE:
Response Surface Methodology-Based SERS for Determination of Gymnodimine
AUTHORS:
Siyang Chan, Yaoyi Wu, Yifan Liu, Donghang Yin, Fei Wang
KEYWORDS:
Surface-Enhanced Raman Scattering, Gymnodimine, Ag Colloid, Box-Behnken Design, Response Surface Methodology
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.14 No.8,
August
29,
2023
ABSTRACT: Gymnodimine (GYM), a fast-acting marine toxin, is destructive to aquaculture and human health through contaminated shellfish. The current detection methods in GYM have definite drawbacks in operation, such as the demand for delicate instruments and the consumption of time. Therefore, silver colloid was utilized as a surface-enhanced Raman scattering (SERS) desirable substrate for sensitive and rapid detection of GYM in lake and shellfish samples. The theoretical spectrum of GYM is calculated by density functional theory (DFT), and the substrate performance is evaluated by a rhodamine 6 G probe. Under the optimal SERS experimental condition calculated by the response surface methodology, the low limit of detection of 0.105 μM with R2 of 0.9873 and a broad linearity range of 0.1 - 10 μM was achieved for GYM detection. In addition, the substrate was satisfyingly applied to detect gymnodimine in the lake and shellfish matrix samples with LOD as low as 0.148 μM and 0.170 μM, respectively. These results demonstrated a promising SERS platform for detecting marine toxins in seafood for food safety and pharmaceutical research.