HollyFrontier Cheyenne Refining LLC, a subsidiary of HollyFrontier Corp., Dallas, has purchased and installed the MetalGuard™ Selenium online analyzer to measure the wastewater selenium profile at the Cheyenne Refinery, Cheyenne, Wyoming.

SafeGuard™ is an automated trace metals analyzer for monitoring municipal and industrial water and wastewater. The system provides real-time, multi-stream analysis for a range of trace metal contaminants. SafeGuard delivers accurate and reliable results (up to 1 ppb or ± 15%, whichever is higher) with a typical measurement time of fewer than 30 minutes.

MetalGuard™ is the first fully automated, online multi-stream analyzer for monitoring trace metal contaminants such as arsenic, chromium-6, selenium and more. The online analyzer provides high frequency real-time data on trace metals contaminant levels in less than one hour with sensitivity down to 1 ppb.

MetalGuard™ Selenium is the first fully automated, online selenium analyzer for monitoring industrial wastewater discharges. The analyzer provides real-time data on selenium contaminant levels in less than two hours with sensitivity down to 1 ppb for certain selenium species.

MetalGuard™ Arsenic is the first fully automated, online arsenic analyzer for monitoring drinking water arsenic levels. The online analyzer provides high frequency real-time data on arsenic contaminant levels in thirty minutes with sensitivity down to 1 ppb.

Aqua Metrology Systems has introduced an innovative and proprietary analytical method on their SafeGuard™ system that provides measurements of trace metals in 5 minutes without compromising accuracy levels.

Real-time data and analytical information from online instruments help utilities comply with water quality regulations. The complete article detailing how online water quality instruments are poised for growth was published in the March/April 2015 issue of World Water.