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Organoarsenic compounds, such as roxarsone (3-nitro-4-hydroxyphenylarsonic acid, ROX) and p-arsanilic acid (ASA), are widely used as animal feed additives, while animal wastes bearing these compounds are often used to fertilize agricultural land, which can cause arsenic pollution of soil, surface water, and groundwater. Determination of a number of inorganic and organic arsenic species in a variety...
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