Potato Slices Drying: Pretreatment Affects the Three-Dimensional Appearance and Quality Attributes

Jun-Wen Bai, Yi Dai, Yu-Chi Wang, Jian-Rong Cai, Lu Zhang and Xiao-Yu Tian ()
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Jun-Wen Bai: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
Yi Dai: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
Yu-Chi Wang: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
Jian-Rong Cai: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
Lu Zhang: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
Xiao-Yu Tian: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China

Agriculture, 2022, vol. 12, issue 11, 1-17

Abstract: In the current study, the effects of steam blanching, saline immersion, and ultrasound pretreatment on the drying time, three-dimensional (3D) appearance, quality characteristics, and microstructure of potato slices were investigated. All the pretreatment methods enhanced the drying kinetics relative to the untreated potato slices. The 3D appearance was evaluated by reconstructed 3D images, shrinkage, and curling degree. The reconstructed images could well reproduce the appearance changes in the potato slices during drying. All the three pretreatment methods reduced the shrinkage during the drying process relative to the untreated potatoes. The curling degree was evaluated by the height standard deviation (HSD) of the material surface. The results showed that saline immersion inhibited the curling of the potato slices during the drying process, while ultrasound aggravated the curling of the potato slices. The potatoes treated by blanching obtained a lower total color difference (ΔE), higher total polyphenol content, and antioxidant capacity compared with the samples treated with saline immersion and ultrasound pretreatments. The observation of the microstructure by scanning electron microscope (SEM) verified the effects of the pretreatments on the drying time and appearance deformation. Therefore, it is of great significance to regulate the 3D appearance and quality characteristics of agricultural products during the drying process by an appropriate pretreatment.

Keywords: potato; pretreatment; drying; three-dimensional appearance; quality; microstructure (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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