OFF-LINE SOLID PHASE SELECTIVE SEPARATION AND PRECONCENTRATION OF Cu, Zn, Pb AND Cd IN DRINKING WATER BY SOLID-PHASE EXTRACTION USING 4´-(2-HYDROXYPHENYLAZO)-3´-METHYL-1´-PHENYL-2´-PYRAZOLIN-5´-ONE FUNCTIONALIZED AMBERLITE XAD-2
BURHAM, N., ABDEL AZEEM, S., EL-SHAHAT, M. (2008). OFF-LINE SOLID PHASE SELECTIVE SEPARATION AND PRECONCENTRATION OF Cu, Zn, Pb AND Cd IN DRINKING WATER BY SOLID-PHASE EXTRACTION USING 4´-(2-HYDROXYPHENYLAZO)-3´-METHYL-1´-PHENYL-2´-PYRAZOLIN-5´-ONE FUNCTIONALIZED AMBERLITE XAD-2. EKB Journal Management System, 19(Issue 1-A), 13-26. doi: 10.21608/absb.2008.8336
N. BURHAM; S. M. ABDEL AZEEM; M. F. EL-SHAHAT. "OFF-LINE SOLID PHASE SELECTIVE SEPARATION AND PRECONCENTRATION OF Cu, Zn, Pb AND Cd IN DRINKING WATER BY SOLID-PHASE EXTRACTION USING 4´-(2-HYDROXYPHENYLAZO)-3´-METHYL-1´-PHENYL-2´-PYRAZOLIN-5´-ONE FUNCTIONALIZED AMBERLITE XAD-2". EKB Journal Management System, 19, Issue 1-A, 2008, 13-26. doi: 10.21608/absb.2008.8336
BURHAM, N., ABDEL AZEEM, S., EL-SHAHAT, M. (2008). 'OFF-LINE SOLID PHASE SELECTIVE SEPARATION AND PRECONCENTRATION OF Cu, Zn, Pb AND Cd IN DRINKING WATER BY SOLID-PHASE EXTRACTION USING 4´-(2-HYDROXYPHENYLAZO)-3´-METHYL-1´-PHENYL-2´-PYRAZOLIN-5´-ONE FUNCTIONALIZED AMBERLITE XAD-2', EKB Journal Management System, 19(Issue 1-A), pp. 13-26. doi: 10.21608/absb.2008.8336
BURHAM, N., ABDEL AZEEM, S., EL-SHAHAT, M. OFF-LINE SOLID PHASE SELECTIVE SEPARATION AND PRECONCENTRATION OF Cu, Zn, Pb AND Cd IN DRINKING WATER BY SOLID-PHASE EXTRACTION USING 4´-(2-HYDROXYPHENYLAZO)-3´-METHYL-1´-PHENYL-2´-PYRAZOLIN-5´-ONE FUNCTIONALIZED AMBERLITE XAD-2. EKB Journal Management System, 2008; 19(Issue 1-A): 13-26. doi: 10.21608/absb.2008.8336

OFF-LINE SOLID PHASE SELECTIVE SEPARATION AND PRECONCENTRATION OF Cu, Zn, Pb AND Cd IN DRINKING WATER BY SOLID-PHASE EXTRACTION USING 4´-(2-HYDROXYPHENYLAZO)-3´-METHYL-1´-PHENYL-2´-PYRAZOLIN-5´-ONE FUNCTIONALIZED AMBERLITE XAD-2

Al-Azhar Bulletin of Science
Article 2, Volume 19, Issue 1-A, June 2008, Page 13-26  XML PDF (263.26 K)
Document Type: Original Article
DOI: 10.21608/absb.2008.8336
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Authors
N. BURHAM* 1; S. M. ABDEL AZEEM1; M. F. EL-SHAHAT2
1Chemistry department, Faculty of Science, Fayoum University, Fayoum City, Egypt
2Chemistry Deparatment, Faculty of Science, Ain Shams University, Cairo, Egypt
Abstract
A new solid – phase extraction sorbent is developed based on stepwise anchoring of two ligand molecules for the determination of copper, zinc, lead and cadmium in drinking water by flame AAS. Amberlite XAD-2 functionalized with 4´-(2-hydroxyphenylazo)-3´-methyl-1´-phenyl-2´-pyrazolin-5´-one (HPAPyr) was utilized for preconcentration/separation of these elements. The sorbent was prepared by two successive azo coupling reactions. Firstly, 2-aminophenol was anchored to the amino groups in the resin resulted from nitration followed by reduction. Then, the resulted 2-aminophenol functionalized resin was further diazotized and coupled to pyrazolone compound and the final product HPAPyr-XAD-2 was characterized by IR and elemental analysis. The optimum pH range for sorption, shaking time, exchange capacity, sample flow rate, preconcentration factor and interference from co-existing ions are investigated.  All metal ions are quantitatively desorbed from the resin by 4.5 mol l-1 nitric acid solution. The sorbent provides limit of detection within the range 0.9 – 3.3 µg l-1 and concentration factor up to 250.  The procedure is validated by analysis of certified material NIST-SRM 1577b.  Application to drinking water showed satisfactory results with relative standard deviation RSD ≤ 8.5 %. 
Keywords
4´-(2-hydroxyphenylazo)-3´-methyl-1´-phenyl-2´-pyrazolin-5´-one; Amberlite XAD-2; Preconcentration; Drinking water
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