CHED 219 |
| Such arsenic containing compounds as roxarsone (4-hydroxy-3-nitrobenzenearsonic acid) and p-arsanilic acid have been used as growth promotors in chicken feed. Workers in factories where poultry feed is produced may be exposed to these organo-arsenic compounds, necessitating the development of methods for air sampling in such environments. In this work we analyze for both roxarsone and p-arsanilic in the same sample using polyvinyl chloride filters as a proper sampler for collection of these compounds from air. Following desorption of the filters with methanol, the compounds are reacted with 1,3-propanedithiol converting them to cyclic dithiaarsenolines, which are then detected by GC-MS. The method is tested against the National Institute for Occupational Safety and Health criteria. Recovery studies are performed to detect organo-arsenic compounds at levels of 0.1x, 0.5x, 1x, and 2x the Permissible Exposure Limit (PEL) and a storage study determines the stability of filters spiked at the level of the PEL. |
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Undergraduate Research Poster Session: Analytical Chemistry
11:00 AM-1:00 PM, Monday, April 7, 2008 Morial Convention Center -- Hall A, Poster
Division of Chemical Education |