| Autor: |
Gastón Villafañe, Vanesa Bazán, Elena Brandaleze, Ayelén López, Pablo Pacheco, Ariel Maratta |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Talanta Open, Vol 6, Iss , Pp 100149- (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2666-8319 |
| DOI: |
10.1016/j.talo.2022.100149 |
| Popis: |
A simple procedure for the synthesis of magnetic hybrid nanoparticles (MHNP) was developed by combining multi-walled carbon nanotubes modified by microwave energy and magnetic iron oxide nanoparticles. MHNP were introduced as sorbents in a magnetic solid phase extraction methodology for the total Arsenic determination in copper ore samples. Arsenic is penalized contaminant element in copper ores. Arsenic was determined by electrothermal atomic absorption spectrometry with a reduced temperature program. Arsenic adsorption corresponded to 96 - 104%, at ug g−1 levels. After a variable screening stage using a Placket-Burman (PBD) experimental design, the developed methodology was optimized using a Box-Behnken experimental design. Based on the optimal working parameters, a detection limit of 30 ng L−1 was reached, with a relative standard deviation of 7.1% and a preconcentration factor (PF) of 50. The Certified Geochem Base Metal Reference Material Product Code GBM900-10 was analyzed for the validation stage. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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