Determination of inorganic arsenic [As(III)+As(V)] in water samples by microwave assisted distillation and hydride generation atomic absorption spectrometry

Inorganic arsenic was determined in samples of natural water from Region II of Chile, using a methodology consisting on microwave assisted distillation and hydride generation atomic absorption spectrometry (HG-AAS). The analytical features of the method are as follows: detection limit, 5 μg l-1; precision (RSD), 5%; and recovery, 93±3% for As(III) and 95±9% for As(V). The inorganic arsenic concentrations varied within the range 0.95-13.08 mg l-1. The concentrations of inorganic arsenic obtained by microwave assisted distillation and HG-AAS, compared with the concentrations of As(III)+As(V) obtained by anion exchange chromatography coupled to HG-AAS, showed no statistically significant differences. The use of microwave assisted distillation and HG-AAS provides a simple, inexpensive way of isolating inorganic arsenic from water matrices that may otherwise cause interferences if analysed directly by HG-AAS.

Bibliographic Details

Main Authors:	Muñoz, Ociel, Vélez, Dinoraz, Montoro Martínez, Rosa, Arroyo, A., Zamorano, M.
Other Authors:	Comisión Interministerial de Ciencia y Tecnología, CICYT (España)
Format:	artículo biblioteca
Published:	Royal Society of Chemistry 2000
Online Access:	http://hdl.handle.net/10261/331163
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