An economic and sensitive method for extracting chromium speciation in airborne inhalable dust,using a green sample treatment coupled with electrothermal atomic absorption |
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| Authors: | Mariem Nafti Chiraz Hannachi Jaber Hsaini Béchir Hamrouni Habib Nouaïgui |
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| Affiliation: | 1. Faculty of Sciences of Tunis, UR11ES17 Desalination and Water Treatment, University of Tunis El Manar , Tunis, Tunisia;2. Tunisian Occupational Safety &3. Health Institute, Occupational Health and Working Environment , Tunis, Tunisia nafti_mariem@yahoo.fr;5. Faculty of Sciences of Tunis, UR11ES17 Desalination and Water Treatment, University of Tunis El Manar , Tunis, Tunisia;6. Tunisian Occupational Safety &7. Health Institute, Occupational Health and Working Environment , Tunis, Tunisia |
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| Abstract: | ABSTRACT A new approach of cloud point extraction CPE procedure is optimized for hexavalent chromium determination in airborne dusts. Triton X-114 is used as a surfactant and 1-(2-pyridylazo)-2-naphthol as a specific complexing agent for the trivalent chromium’s removal from the aqueous phase to isolate hexavalent chromium compounds. The parameters influencing the extraction protocol (pH, surfactant concentration, and temperature are optimized. The obtained detection and quantification limits are 0.1 and 0.4 μg/L, respectively. The linearity is verified, with a regression coefficient close to 0.999 and the extraction recovery exceeds 99%. The method was successfully applied to analyze airborne samples collected from workplaces. |
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| Keywords: | Airborne samples environmental monitoring cloud point extraction hexavalent chromium speciation green chemistry |
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