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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Lima, Jlfc
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Publications (6/6 displayed)
- 2012pH sensitive silica nanotubes as rationally designed vehicles for NSAIDs deliverycitations
- 2009Multisyringe flow injection analysis system for automation of standard addition calibration methodcitations
- 2006Tubular potentiometric detector used to determine As(V) in sediment extracts by flow injectioncitations
- 2006Inhibition of human neutrophil oxidative burst by pyrazolone derivativescitations
- 2002Automatic potentiometric flow titration procedure for ascorbic acid determination in pharmaceutical formulationscitations
- 2001Automatic flow titrator based on a multicommutated unsegmented flow system for alkalinity monitoring in wastewaterscitations
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article
Tubular potentiometric detector used to determine As(V) in sediment extracts by flow injection
Abstract
The construction and evaluation of a tubular potentiometric detector sensitive to As(V) ions is described. This electrode, with no inner reference solution, is comprised of a FeOOH-SiO2-graphite composite agglutinated with an epoxy resin. For As(V) ion concentrations in the range 1.0 x 10(-5) to 1.0 x 10(-1) mol L-1 , the sensor is used as the selective electrode in an FIA system along with a commercial Ag/AgCl reference electrode. In optimal conditions, the practical limit of detection is 4 x 10(-6) mol L-1 and a sampling rate of 40 h(-1) can be achieved. The system was applied to estimate As(V) levels in sediments of a drinking water distributor in Zimapan (Mexico), an area known to be polluted with this element. The As(V) concentrations detected in the different extracts of sediments generated by the sequential modified BCR three-step extraction procedure (BCR-SEP) were comparable to those obtained by electrothermal atomic absorption spectroscopy (ET-AAS).