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Determination of Arsenic in Homeopathic Drugs by Bromide Volatilization-Inductively Coupled Plasma-Atomic Emission Spectrometry

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Arsenic in homeopathic drugs was determined by coupling a volatile generation with inductively coupled plasma-atomic emission spectrometry. The method is based on the chemical vaporization of arsenic(III) with bromide ions in sulfuric acid media using a batch procedure and subsequent introduction of the gaseous analyte into the plasma torch. The main and interactive effects of the experimental variables affecting this method were evaluated by a 2-level full factorial design. In optimized conditions by Simplex, the method shows an absolute detection limit (3 s) of 0.28 μg for the injection of 200 μL sample. The precision (% relative standard deviation) of the determination was 4.2% at a level of 50 μg/mL As(III) (n = 5). The interference effect of various ions on the arsenic signal was evaluated.
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Document Type: Research Article

Affiliations: University of Zaragoza, Faculty of Science, Department of Analytical Chemistry, 50009 Zaragoza, Spain.

Publication date: January 1, 2002

More about this publication?
  • The Journal of AOAC INTERNATIONAL publishes refereed papers and reviews in the fields of chemical, biological and toxicological analytical chemistry for the purpose of showcasing the most precise, accurate and sensitive methods for analysis of foods, food additives, supplements and contaminants, cosmetics, drugs, toxins, hazardous substances, pesticides, feeds, fertilizers and the environment available at that point in time. The scope of the Journal includes unpublished original research describing new analytical methods, techniques and applications; improved approaches to sampling, both in the field and the laboratory; better methods of preparing samples for analysis; collaborative studies substantiating the performance of a given method; statistical techniques for evaluating data. The Journal will also publish other articles of general interest to its audience, e.g., technical communications; cautionary notes; comments on techniques, apparatus, and reagents.
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