Aluminum (Al) is the most abundant metallic element and constitutes about 8% of the earth's crust. The aluminium is related to different neurological disorders like Alzheimer's, bipolar, depression, etc. As well as anemia, also reduces the absorption of calcium causing pain, deformities and broken bones.^1-2 The development of nanotechnology has led to a growing interest in the study and design of nanosensors, in order to improve selectivity, limit of detection, reproducibility and durability of the current sensors.^4-5

In this paper is repoted the preparation of  hybrid material based on platinum nanoparticles (NP Pt) on  multiwall carbon nanotubes (MWCNT) prepared by inverse microemulsion method using sodium dodecyl sulfate (SDS) as surfactant in a mixture of hexane/isopropanol/water. The hybrid material was characterized by transmission electron microscopy (TEM). The hybrid material showed small spherical nanoparticles with average sizes of 2.15±0.54 nm, well as thermogravimetric analysis  a load of 20% platinum.

The NP Pt/MWCNT hybrid material use for determining Al⁺³ using dopamine as a chelating molecule for the indirect determination of the aluminum by differential pulse voltammetry in neutral medium. Under optimal experimental conditions it was determined the sensitivity of the NP Pt/ MWCNT sensor was 27.75 μA/ppb  Al⁺³ with a  linear response range from 0 up to 15 ppb Al³⁺.

References

1. C. Exley, Environ Sci: Process Impacts, 15, 1807, (2013).

2. WHO (World Health Organization), Safety  evaluation of certain food additives and contaminants, p.173, WHO, Geneva, 2007.

3. R. L. McCreery, , Chem. Rev. 108, 2646 (2008).

4. A. Hayat, G. Catanante, J. Louis Marty,  Sensors, 14, 23439 (2014).