Flow injection spectrophotometric determination of iron(III) using diphenylamine-4-sulfonic acid sodium salt
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Adem Asan
,
Muberra Andac
Abstract
A highly sensitive and very simple spectrophotometric flow-injection analysis (FIA) method for the determination of iron(III) at low concentration levels is presented. The method is based on the measurement of absorbance intensity of the red complex at 410 nm formed by iron(III) and diphenylamine-4-sulfonic acid sodium salt (DPA-4-SA). It is a simple, highly sensitive, fast, and low cost alternative method using the color developing reagent DPA-4-SA in acetate buffer at pH 5.50 and the flow-rate of 1 mL min−1 with the sample throughput of 60 h−1. The method provided a linear determination range between 5 μg L−1 and 200 μg L−1 with the detection limit (3S) of 1 μg L−1 of iron(III) using the injection volume of 20 μL. FIA variables influencing the system performance were optimized. The amount of iron(III) and total iron in river and seawater samples was successfully determined. Repeatability of the measurements was satisfactory at the relative standard deviation of 3.5 % for 5 determinations of 10 μg L−1 iron(III). The accuracy of the method was evaluated using the standard addition method and checked by the analysis of the certified material Std Zn/Al/Cu 43 XZ3F.
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© 2008 Institute of Chemistry, Slovak Academy of Sciences
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Artikel in diesem Heft
- Square-wave adsorptive stripping voltammetric determination of an antihistamine drug astemizole
- Flow injection spectrophotometric determination of iron(III) using diphenylamine-4-sulfonic acid sodium salt
- Sensitive determination of nitrogenous hydrochloride drugs via their reaction with ammonium molybdate
- Effect of different Fe(III) compounds on photosynthetic electron transport in spinach chloroplasts and on iron accumulation in maize plants
- Comparison of different technologies for alginate beads production
- Design and economics of industrial production of fructooligosaccharides
- Preparation of nanocrystalline anatase TiO2 using basic sol-gel method
- 3,5-Bis(2-hydroxyphenyl)-1H-1,2,4-triazole based ligands — protonation and metal complex formation
- Synthesis, characterization, fluorescence and redox features of new vic-dioxime ligand bearing pyrene and its metal complexes
- Synthesis and characterization of diaminomaleonitrile-functionalized polystyrene grafts for application in pervaporation separation
- Synthesis and magnetic properties of polymeric complexes containing ruthenium(II)-ruthenium(III) tetracarboxylato units linked by cyanato, thiocyanato, and selenocyanato ligands
- Preparation and modification of collagen-based porous scaffold for tissue engineering
- Synthesis, crystal structure, and magnetic properties of a cobalt(II) complex with (3,5-dichloropyridin-4-yl)(pyridin-4-yl)methanol
- Synthesis and reactions of 2-[3-(trifluoromethyl)phenyl]furo[3,2-c]pyridine
- Alkalimetric determination of hydrophobic pharmaceuticals using stabilized o/w emulsions
- Extraction and analysis of ellagic acid from novel complex sources
