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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Rohwedder, Jarbas J. R. Dias, Tuanne R. Brasil, Marcos A. S. Reis, Boaventura F. |
| Copyright Year | 2014 |
| Abstract | This article focuses on the development of an analytical procedure for the photometric determination of vanadium in fresh and mineral waters, implemented employing a downsized multicommuted flow analysis approach. A flow system module using solenoid mini-pumps for fluid propelling and a light emitting diode (LED) based photometer were handled employing a microcontroller (PIC18F). Aiming to improve sensitivity, the flow analysis module and the photometer were designed to allow the coupling of a flow cell with an optical pathlength of 150 mm. The photometric procedure was based on the reaction of V(IV) with eriochrome cyanine R, which formed a compound that presented maximum absorption at 560 nm. Samples of river water and mineral water were processed with the intention to assess the effectiveness of both equipment setup and analytical procedure. The proposed setup presented good overall performance including a linear response (r = 0.997) comprising the concentration range of 0.02 to 1.50 μg mL−1 vanadium; reagent consumption of 11.6 μg eriochrome cyanine R and 8.6 mg ascorbic acid per determination; and a detection limit of 13 μg L−1 vanadium. Other useful features including a relative standard deviation of 0.87% (n = 10), a sampling throughput of 47 determination per hour and a waste generation of 2.4 mL per determination were also achieved. |
| Starting Page | 9667 |
| Ending Page | 9674 |
| Page Count | 8 |
| File Format | HTM / HTML PDF |
| ISSN | 17599660 |
| Volume Number | 6 |
| Issue Number | 24 |
| Journal | Analytical Methods |
| DOI | 10.1039/c4ay01522c |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Mineral System Module Solenoid Acid Microcontroller Vanadium Mineral water Photometer Cyanine Reagent Coefficient of variation Light-emitting diode |
| Content Type | Text |
| Resource Type | Article |
| Subject | Analytical Chemistry Engineering Chemical Engineering |
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