Propylene is an organic chemical refined from crude oil distillates. It is sold by refineries to chemical processors for polymerization to polypropylene, from which a variety of plastics are manufactured. Arsine is usually present in ethylene streams in concentrations up to 50ppb and can contaminate the catalysts used in the polymerization process. When this occurs the catalyst must be regenerated or replaced; a very expensive procedure in terms of time, chemicals and production losses due to process downtime. To avoid catalyst contamination, a reliable, accurate measurement of arsine content in propylene is desirable and has become one of the propylene purity checks used in assessing product quality. Chemical processing plants will not accept propylene with arsine concentration of 50ppb or higher. It must be diluted scrubbed or otherwise removed by the refiner. CI Analytics provides analyzers capable of monitoring arsine and works to ensure your compliance with product quality standards.