期刊
FOOD CHEMISTRY
卷 388, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2022.132973
关键词
Palm oil; Sudan II; Sudan IV; SERS; Fraud; Authentic
资金
- Key R&D Program of Jiangsu Province [BE2021343]
- Jiangsu Agricultural Independent Innovation Fund [SCX203321]
- Project of Faculty of Agricultural Equipment of Jiangsu University [NZXB20200214]
- Traceability Technology and Application of Quality and Safety of Agricultural Products Open Project of National Engineering Laboratory [AQT-2019-YB8]
This study successfully detected adulteration of harmful Sudan dyes in edible CPO using surface-enhanced Raman spectroscopy and chemometrics, and demonstrated that this method can be used to authenticate edible CPO.
Edible crude palm oil (CPO) is a vital oil utilized in various industries, including food, pharmaceuticals, and domestic cooking. Unfortunately, reports of CPO adulteration with harmful Sudan dyes have surfaced over the years. Surface-enhanced Raman spectroscopy (SERS) and chemometrics were employed to detect Sudan dyes adulteration in CPO within 900 - 1800 cm(-1) Raman peak. The concentration of Sudan dyes detected in CPO samples ranged between 0.005 and 4 ppm. The principal component analysis (PCA) model detected Sudan II and Sudan IV in CPO with 99.88 and 99.90% accuracy. Linear discriminant analysis (LDA) and K-Nearest Neighbors (KNN) also recorded high detection rates of Sudan II and IV dyes in CPO. Sudan II and IV dyes could be detected at 0.0028 ppm and 0.0019 ppm by this sensor. The performance of the Au@Ag SERS sensor was comparable to that of HPLC. This study proved SERS and chemometrics can be used to authenticate edible CPO.
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