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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.18 [2011] >
IJCT Vol.18(3) [May 2011] >
| Title: | Solid phase extraction for selective separation/preconcentration of copper using N-benzoyl N-phenylhydroxyl amine as sorbent modifier |
| Authors: | Dalali, Nasser
Farhangi, Leila
Hosseini, Mehdi |
| Keywords: | Solid phase extraction
Copper
N-benzoyl N-phenyl hydroxyl amine |
| Issue Date: | May-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | A simple and
relatively fast method for the selective separation and preconcentration of
trace amounts of copper in real samples, for determination by flame atomic absorption
spectrometry is reported. By passing the aqueous solutions of pH 5 through an
octadecyl-bonded silica membrane disk modified by N-benzoyl N-phenyl
hydroxyl amine (BPHA), copper is retained
quantitatively while almost all matrix elements are passed through. The
retained copper ions are then eluted from the disk by minimal amount of HNO3.
Maximum capacity of the disk modified by 5 mg BPHA is found to be 217± 6  g
of Cu2+ ions. The method
permitted separation of copper ions from coexisting metal ions with an
enrichment factor of 200. A good precision for 10 g L-1 copper
(2.5% R.S.D, n = 8) and detection limit (3Sb
m-1) 0.3 g L-1 are obtained. The accuracy is
assessed by analysis of two standard reference materials (NBS-364) and
(JSS-651-7). The proposed method is applied to the determination of copper in
water, waste water and steel samples. |
| Page(s): | 183-187 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.18(3) [May 2011]
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