We report on development of ammonia monitoring technology for confine animal feeding operations (CAFOs). The atmosphere within a CAFO is typically hot with high humidity and often considerable concentrations of ammonia.High levels of particulates are often also present. These conditions present a challenge to conventional ammonia monitoring technologies. Here, we discuss our recent progress on development of a fast, sensitive and robust colorimetric approach for ammonia in this challenging environment.

The Problem The National Institutes of Health announced in May 2007 that Cr(VI) shows, in laboratory testing, strong evidence of being carcinogenic when ingested in drinking water. Cr(VI) typically exists in groundwater as the highly soluble and mobile chromate anion.

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