Cu(II), mg Abs. error R. error SD RSD,% Found Certified 2.05 2.0 0.18 0.018 0.013 0.13 2.95 3.0 0.23 0.044 0.02 0.38

Table 3: Analysis of Cu(II) in some drug samples after flotation using 1 x 10-2 mol L-1 NaPAR and 1 x 10-4 mol L-1 HOL at pH 4 at 25ºC (n=3).