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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.19 [2012] >
IJCT Vol.19(5) [September 2012] >
| Title: | Online solid-phase extraction coupled to flame atomic absorption spectrometry for determination of trace amounts of copper (II) ion in water samples |
| Authors: | Hosseini, Mehdi
Dalali, Nasser |
| Keywords: | Copper
Flame atomic absorption spectrometry
Flow injection
Neocuproine |
| Issue Date: | Sep-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | A solid phase extraction-flow injection
procedure for online determination of Cu(II)
by flame atomic absorption spectrometry (FI-AAS) has been reported. The metal
ions are retained as Cu(I)-neocuproine complex in a mini-column
filled with octadecyl bonded silica (C18) as sorbent material.
Quantitative extraction has been obtained at pH 5.0. The retained metal
ions are then eluted efficiently with ethanol into the nebulizer of flame atomic absorption spectrometer for
on-line determination. Different variables affecting the preconcentration
efficiency, including pH, neocuproine concentration, eluent type,
sample, eluent flow rates and sample loading time, are optimized. Two minute
preconcentration at flow rate of 6 mL min-1 provides the enhancement
factor of 100 for Cu(II). The
detection limit (3σ) is found to be
0.15 µg L-1for Cu(II),
and the relative standard
deviation at 5.0 μg L-1 of target metal ions
is 1.2% (n=7). The accuracy
has been assessed by analysis of certified reference materials CASS-4 and CRM1643d, and the obtained results are found in good agreement with certified
amounts of Cu(II). The procedure has been applied
successfully to Cu(II) ion determination in water samples.
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| Page(s): | 337-341 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.19(5) [September 2012]
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