期刊
ANALYTICA CHIMICA ACTA
卷 649, 期 2, 页码 191-195出版社
ELSEVIER
DOI: 10.1016/j.aca.2009.07.036
关键词
Antimony; Speciation; Airborne; Particulate matter; Ultrasound probe; High Performance Liquid Chromatography-Hydride Generation-Atomic Fluorescence Spectrometry
资金
- Ministerio de Educacion y Ciencia (Spain) [CTM2006-08960-C02-01]
A fast extraction procedure has been developed for Sb(III) and Sb(V) oxoanions speciation in airborne particulate matter samples. Different extraction media (diammonium tartrate, hidroxilammonium clorhidrate, citric acid + ascorbic acid, phosphoric acid and citrate solutions) were tried, with assistance of an ultrasonic probe. The operation power and time of extraction were also optimized. The higher extraction recoveries were obtained witha 100 mmol L-1 hidroxilammonium clorhidrate aqueous solution assisted by the ultrasound probe operated at 50 W during 3 min. The extracts were analyzed by HPLC-HG-AFS. The chromatographic separation of Sb(III) and Sb(V) was also optimized using diammonium tartrate and phthalic acid as mobile phases. The separation of both Sb species was performed in less than 3 min under isocratic conditions, using a 200 mmol L-1 diammonium tartrate solution. The proposed extraction procedure and the HPLC-HG-AFS instrumental coupling have been Successfully applied to airborne particulate matter samples, with high Sb content, collected in heavy traffic streets from Buenos Aires (Argentina). The results showed the presence of both Sb species at similar concentrations in the rig m(-3) level. The extraction yield was higher than 90% for all the analyzed samples. (C) 2009 Elsevier B.V. All rights reserved.
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