Rapid Assessment of Total Polar Material in Used Frying Oils Using Manganese Tetraphenylporphyrin Fluorescent Sensor wit
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Rapid Assessment of Total Polar Material in Used Frying Oils Using Manganese Tetraphenylporphyrin Fluorescent Sensor with Enhanced Sensitivity Haiyang Gu 1
&
Xingyi Huang 2 & Quansheng Chen 1,2 & Yanhui Sun 1
Received: 2 December 2019 / Accepted: 23 July 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Probe-based three-dimensional fluorescence spectroscopy was developed for the rapid assessment of frying oil quality. Tetraphenylporphyrin manganese (MnTPP) was selected due to its sensitivity and selectivity in response to dissolved organic matter, which is typically produced during the frying process of oil analyte. Parallel factor analysis (PARAFAC) was then performed to decompose three-dimensional fluorescence data for model construction. The digital data representing the change of the MnTPP-base fluorescent probe before and after exposure to dissolved organic matter were analyzed using support vector regression (SVR). SVR was then used for the construction of the regression model between the fluorescence data and the total polar material (TPM). The coefficients of determination (R2) in the training set (R2 = 0.9719) and the test set (R2 = 0.9699) were achieved to evaluate the robustness of the best models for TPM. This study demonstrated that the probe-based three-dimensional fluorescence spectroscopy is useful for assessing the quality of frying oil and perhaps could be used for other food products with high oil contents. Keywords Frying oil . Fluorescent probe . Three-dimensional fluorescence spectroscopy . Parallel factor analysis . Support vector regression
Introduction Palm oil is the most popular frying oils used in the world and has attracted interest due to its low price, health benefits, and high stability (Andreusevilla et al. 2009; Matthäus 2010). Assessing and controlling the quality of palm oil have become increasingly important due to the growing consumption of palm oil. The total polar material (TPM) is considered to be one of the most important reference measurements of oil quality (Li et al. 2017; Song et al. 2017). TPM indicates the oxidation degree of various chemical and physical changes in the palm oil. Conventionally, TPM assessment has been carried out by accelerated sensory evaluation, solvent extraction, and titration (Fritsch 1981; Xu et al. 1999; Zainal and Isengard
* Haiyang Gu [email protected] 1
School of Bio and Food Engineering, Chuzhou University, Chuzhou 239000, China
2
School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
2010). These methods provide reliable results regarding oil quality and can be carried out in conventional laboratories. However, these methods destroy analytes and suffer from a time-consuming problem; therefore, they cannot easily meet the demands for quality control in the oil industry. The nature of assessing oil quality is the detection and analysis of dissolved organic matter changes in the oil samples. Probe-based dissolved organic matter (DOM) sensing is regarded as a potent
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