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Mass Spectrometric Identification of An Azobenzene Derivative Produced By Smectite-Catalyzed Conversion of 3-Amino-4-Hydroxphenylarsonic Acid

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Abstract:We report here the first evidence of a possible mechanism for the formation of an azobenzene arsonic acid compound in the environment The compound was formed when 3-amino-4-hydroxyphenylarsonic acid (3-amino-HPAA) was added to aqueous suspensions of smectite clay The 3-amino-HPAA is a degradation product excreted by chickens that are fed rations amended with roxarsone. Roxarsone is used to control coccidial intestinal parasites in most of the broiler chickens grown in the United States. The structure of the azobenzene arsonic acid compound was first inferred from negative- ion and positive-ion low-resolution mass-spectrometric analyses of the supernatant of the smectite suspension. Elemental composition of the parent ion determined by high-resolution positive-ion mass spectrometric measurements was consistent with the proposed structure of the azobenzene arsonic acid compound.

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Citation:Wershaw, R. L., D. W. Rutherford, C. E. Rostad, J. R. Garbarino, I. Ferrerfelis, K. R. Kennedy, G. M. Momplaisir, and A. H. Grange. Mass Spectrometric Identification of An Azobenzene Derivative Produced By Smectite-Catalyzed Conversion of 3-Amino-4-Hydroxphenylarsonic Acid. TALANTA 59(6):1219-1226, (2003).
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Contact: Chris Siebert - (702) 798-2234 or siebert.christopher@epa.gov
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Division: Environmental Sciences Division
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Branch: Environmental Chemistry Branch
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Product Type: Journal
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Published: 03/25/2003
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Related Entries:
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Bullet Item Environmental Chemistry
spacer Relationship Reason:   A Project of the Product
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