Skip to main content

Table 1 Effect of different eluents on the recoveries of heavy metal ions

From: A new sorbent based on MWCNTs modification for separation/preconcentration of trace amounts of Cd(II), Cr(III), Cu(II), Ni(II), and Pb(II) and their determination by flame atomic absorption spectrometry

Eluent Concentration (mol L−1) Recovery (%)
Pb(II) Ni(II) Cr(III) Cu(II) Cd(II)
HNO3 0.1 93.3 88.5 88.7 89.9 92.5
0.3 96.7 95.7 94.1 95.7 97.8
0.5 98.4 99.6 97.7 98.1 99.7
H2SO4 0.1 78.5 83.4 86.7 92.4 87.5
0.3 80.3 87.1 88.9 96.5 89.4
0.5 84.2 89.9 91.2 98.7 91.4
HCl 0.1 84.6 80.2 78.6 83.5 88.4
0.3 86.7 82.4 81.1 88.8 91.2
0.5 88.2 86.9 84.0 91.2 96.3