“…However, other organic solvent combinations such as acetone–dichloromethane and acetic acid–ethyl acetate (Varenina et al., 2016), ethyl acetate–water (Premarathne et al., 2017), or only ethyl acetate (Dai et al., 2017; Govind et al., 2018) have been also used. Once in solution, SAs preconcentration and purification techniques include LLE (Govind, Babu, Rao, Sriram, & Senthil, 2018; Premarathne, Satharasinghe, Gunasena, Munasinghe, & Abeynayake, 2017), DLLME (Deng, Lan, Sun, Ji, & Zheng, 2016), SPE (X. L. Chen et al., 2019; Z. Chen et al., 2019; Dai et al., 2017; Y. Li et al., 2018; Moga et al., 2020; Varenina et al., 2016), DSPE (Deng et al., 2016; Xia et al., 2020), DSPME (Y. Wang et al., 2017), MSPE (Liu, Tong, & Zhang, 2020; Xia et al., 2017; Zhao et al., 2020), magnetic solid phase microextraction (MSPME, Nasir et al., 2019), or the use of QuEChERS (Huertas‐Pérez et al., 2016; C. H. Wen et al., 2017). For cleaning and preconcentration step, commercial sorbents such as C 18 , amino adsorbent and neutral alumina (Deng et al., 2016), aromatic sulfonic acid (Varenina et al., 2016), and a polymeric strong cation exchange (Dai et al., 2017) have been employed.…”