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Details van artikel 7 van 16 gevonden artikelen
| Titel: | |
| Auteur: | |
| Verschenen in: |
Analytical letters |
| Paginering: | Jaargang 27 (1994) nr. 6 pagina's 1165-1173 |
| Jaar: |
1994-04-01 |
| Inhoud: |
The polarographic behavior of the complex of iron-4- (2-pyridylazo) resorcin(PAR) was studied. In HAc- NaAc- EDTA buffer solution, the complex can be adsorped on a hanging mercury drop electrode giving a sensitive adsorptive complex reduction peak with a peak potential at -0.36V(vs. SCE). Optimum experimental conditions were found by the use of 0.08mol/L HAc, 0.06mol/L NaAc, 5.0 × 10-3mol/L EDTA and 1.0 × 10-5mol/L PAR. With preconcentration for 60s, the derivative peak height of the complex compound is linearly proportional to the concentration for Fe in the range from 1.0 × 10-9mol/L to 1.0 × 10-7mol/L. For a 2-min pre-concentration time, the detection limit found was 2.0 × 10-10mol/L. This method has high sensitivity and selectivity. It has been applied to the determination of trace iron in food and water samples without any pre-separation step. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 7 van 16 gevonden artikelen
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