Determination of trace metal ions via on-line separation and preconcentration by means of chelating Sepharose beads in a sequential injection lab-on-valve (SI-LOV) system coupled to electrothermal atomic absorption spectrometric detection

Talanta ◽  
2005 ◽  
Vol 66 (5) ◽  
pp. 1326-1332 ◽  
Author(s):  
X LONG ◽  
E HANSEN ◽  
M MIRO
Keyword(s):  
Trace Metal ◽  
Metal Ions ◽  
Atomic Absorption ◽  
Sequential Injection ◽  
Trace Metal Ions ◽  
Separation And Preconcentration ◽  
On Line ◽  
Line Separation ◽  
Atomic Absorption Spectrometric

scholarly journals ICP-OES Determination of Trace Metal Ions after Preconcentration Using Silica Gel Modified with 1,2-Dihydroxyanthraquinone

2012 ◽  
Vol 9 (2) ◽  
pp. 1007-1016 ◽  
Author(s):  
Reem M. Alghanmi
Keyword(s):  
Trace Metal ◽  
Metal Ions ◽  
Silica Gel ◽  
Inductively Coupled Plasma ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Trace Metal Ions ◽  
Relative Standard ◽  
Separation And Preconcentration

A new chelating matrix was prepared by immobilizing 1,2-dihydr-oxyanthraquinone, or alizarin (AZ), on silica gel modified with (3-aminopropyl)trimethoxysilane. The matrix was characterized by FTIR spectroscopy and elemental analysis. The new matrix was used to preconcentrate Cd(II), Cu(II), Ni(II), Pb(II) and Zn(II) prior to their determination by inductively coupled plasma optical emission spectrometry (ICP-OES). The optimum pH was 5 and the optimum extraction time was approximately 15 minutes using the batch method. Common electrolytes and metal ions did not interfere with the separation and determination of the analytes. The adsorption capacity of the new sorbent was 67.4, 163.5, 212.8, 76.4 and 180.3 μmol/g for Cd(II), Cu(II), Ni(II), Pb(II) and Zn(II), respectively. The relative standard deviations (RSD) were less than 3.0%. This method allowed for successful separation and preconcentration of trace metal ions in different water samples with satisfactory results.

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