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
Days of analysis
Inter-day RSD (%)
Pb
Ni
Cd
Cu
Cr
Day 1
3.16
2.19
2.23
1.8
3.1
Day 2
2.83
2.94
2.13
1.88
2.79
Day 3
3.57
1.63
1.87
2.14
2.3
Intra-day RSD (%)
3.12
2.17
2.01
1.82
3.31