Yao-Say Solomon Adade Selorm, Lin Hao, Jiang Hao, Haruna Suleiman A, Osei Barimah Alberta, Zareef Muhammad, Akomeah Agyekum Akwasi, Adwoa Nkuma Johnson Nana, Mehedi Hassan Md, Li Huanhuan, Chen Quansheng
School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China; Department of Nutrition and Dietetics, Ho Teaching Hospital, Ho, Ghana.
School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
Food Chem. 2022 Sep 15;388:132973. doi: 10.1016/j.foodchem.2022.132973. Epub 2022 Apr 15.
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 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.
食用粗棕榈油（CPO）是一种重要的油脂，广泛应用于食品、制药和家庭烹饪等多个行业。不幸的是，多年来一直有关于CPO被有害苏丹染料掺假的报道。采用表面增强拉曼光谱（SERS）和化学计量学方法，在900 - 1800 cm拉曼峰范围内检测CPO中苏丹染料的掺假情况。CPO样品中检测到的苏丹染料浓度在0.005至4 ppm之间。主成分分析（PCA）模型检测CPO中苏丹II和苏丹IV的准确率分别为99.88%和99.90%。线性判别分析（LDA）和K近邻算法（KNN）在CPO中对苏丹II和IV染料也有较高的检测率。该传感器能够检测到浓度低至0.0028 ppm的苏丹II染料和0.0019 ppm的苏丹IV染料。金@银SERS传感器的性能与高效液相色谱法（HPLC）相当。这项研究证明，SERS和化学计量学可用于鉴定可食用CPO。
