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Flow injection spectrophotometric determination of iron(III) using diphenylamine-4-sulfonic acid sodium salt
Asan, Adem, Andac, Muberra, Isildak, Ibrahim and Tinkilic, Nihat Flow injection spectrophotometric determination of iron(III) using diphenylamine-4-sulfonic acid sodium salt Chemical Papers, Vol.62, No. 4, 2008, 345-349
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Author(s) |
Asan, Adem
Andac, Muberra
Isildak, Ibrahim
Tinkilic, Nihat
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| Title |
Flow injection spectrophotometric determination of iron(III) using diphenylamine-4-sulfonic acid sodium salt
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| Journal name |
Chemical Papers
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| Publication date |
2008
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| Year available |
2008
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| Volume number |
62
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| Issue number |
4
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| ISSN |
0366-6352
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| Start page |
345
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| End page |
349
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2008
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| Language |
english
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| Subject |
250000 Chemical Sciences
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| Abstract/Summary |
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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