“…The popularity of this technique is because of rapid measurement, minimal/no sample preparation requirements, noninvasive/nondestructive sampling and testing, the capacity for prediction of physical and chemical parameters from one single spectrum, and the possibility of at‐line, on‐line, and in‐line analysis by use of fiber optic probes and other adaptable instrumentation and its adaptability. NIR‐spectroscopy has been successfully applied for food inputs monitoring in the area of food safety to detect pesticides and herbicides residues in fruits and vegetables (Salguero‐Chaparro, Gaitan‐Jurado, Ortiz‐Somovilla, & Pena‐Rodrıguez, 2013; Shen, Yan, Ye, & Ying, 2009; Xue, Cai, Li, & Liu, 2012), for detection of foodborne pathogens (Sivakesava, Irudayaraj, & DebRoy, 2004; Veleva‐Doneva, Draganova, Atanassova, & Tsenkova, 2010), for food adulteration (Chen et al., 2011; Ebrahimi‐Najafabadi et al., 2012; Mishra, Kamboj, Kaur, & Kapur, 2010), for nitrate measurement in different fruits and vegetables (Entrenas, Pérez‐Marín, Torres, Garrido‐Varo & Sánchez, 2019; Itoh, Tomita, Uno, & Shiraishi, 2011; Xue & Yang, 2009; Sánchez et al., 2017; Torres, Sánchez, Entrenas, Garrido‐Varo, & Pérez‐Marín, 2019). The estimation of nitrate content in spinach leaves by considering the whole range of NIRS was previously reported by the Entrenas, Pérez‐Marín, Torres, Garrido‐Varo, and Sánchez (2020) and Pérez‐Marín, Torres, Entrenas, Vega & Sánchez (2019).…”