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Table 7 Comparison of the proposed method with some recent studies using multiwalled carbon nanotubes as solid phase extractor

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

Analytes Adsorbent Detection method Enrichment factor RSD (%) Detection limit (ng mL−1) Reference
Pb MWCNTs FAAS 20 <2.5 4.9, 8.0 (Ozcan et al. 2010)
Pb, Cu, Cd, Ni APDC-MWCNTs FAAS 80 <5 0.3–0.6 (Tuzen et al. 2008)
Pb, Cd MnO2-CNTs ETAAS 100 <3.2 4.4, 1.5 (Yang et al. 2011)
Ni Activated carbon FAAS 100 2.28 1.72 (Kiran et al. 2007)
Cu, Ni MWCNT-hexahistidine-tagged protein FAAS 29.28 2.4 0.3, 0.63 (Liu et al. 2009)
Cr MWCNT FAAS 100 <9 0.9 (Tuzen and Soylak 2007)
Cu, Ni MWCNTs impregnated with D2EHPA FAAS 25 <10 50 (Vellaichamy and Palanivelu 2011)
Cu, Pb, Ni MWCNTs FAAS 100 2.4–3.4 1.0–2.6 (Ghaedi et al. 2012)
Pb     3.16 0.89  
Ni     2.19 0.21  
Cr MWCNTs-EDDA FAAS 130 3.34 0.15 This work
Cd     2.23 0.04  
Cu     1.89 0.14