“…(a) For the environmental sample in solid state, the digestion step was required. The digestion techniques were classified mainly in two ways including (1) acid digestion (Lin et al, 2009;Cunha et al, 2001;Swift et al, 1998;Ham et al, 1997;Martin et al, 1998;Cho et al, 2016;Prabhath et al, 2015;Sreejith et al, 2014;Jia et al, 2018;Chen et al, 2001; Szarlowicz e a 18 K ç 14 2018; Belivermis et al, 2019; Sanchez-Cabeza e a e a 1998 P aninšek e a 2013; Takizawa et al, 2000;Beals et al, 1989;Sadi et al, 2016) and (2) fusion method Sadi et al, 2016;Maxwell et al, 2019). Acid digestion has been limited to the effect of 210 Po volatilization under different temperature conditions (Martin et al, 1969;Heyraud et al, 1979;Mabuchi et al, 1963;Henricsson et al, 2011;Seiner et al, 2014).…”