Research Article

Determination of Metals in Natural Waters by Inductively Coupled Plasma Optical Emission Spectroscopy after Preconcentration on Silica Sequentially Coated with Layers of Polyhexamethylene Guanidinium and Sulphonated Nitrosonaphthols

Table 6

LOD values of ICP-OES analysis and preconcentration factors (PF) obtained for selected metal ions with different adsorbents.

MetalSiO2-PHMG-NRSSiO2-PHMG-NNS
LOD,
ng mLāˆ’1
PFRSD, %LOD,
ng mLāˆ’1
PFRSD, %

Cu(II)0.76400.680.75800.77
Fe(III)0.83401.470.82801.35
Al(III)1.34322.171.35662.23
Ni(II)0.95261.640.96281.52
Zn(II)0.77240.890.77300.93
Pb(II)0.87202.350.88421.98