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Selenium Se
Although selenium is a component of many minerals, it is only the seventieth most abundant element in the earth’s crust and occurs mostly in small crystals and in small quantities. It typically only occurs at elevated concentrations in the environment as a byproduct of anthropological activity. An essential micro-nutrient, selenium becomes toxic to most eukaryotic organisms at relatively low concentrations.

Selenium testing for total recoverable concentrations by conventional ICP-MS techniques is extremely prone to mass spectral interferences. The plasma gas (argon) and constituents of the sample matrix (calcium, carbon, chloride, sulfur, etc.) can easily combine to form polyatomic ions with the same mass-to-charge ratios as the various isotopes of selenium, resulting in false-positives and elevated detection limits.

The table below lists the different isotopes of selenium and the common interferences that can affect measurements at those isotopes.

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Selenium Related News

Se and Hg in Fish Collected Near Power Plants

Brooks Applied Labs’ data was featured prominently in a recent Environmental Toxicology and Chemistry journal article titled, “Selenium and Mercury in Freshwater Fish Muscle Tissues and Otoliths: A Comparative Analysis”.

Welcome to the Selenium Centre of Excellence

The Selenium Centre of Excellence (SCE) is a non-profit organization seeking to advance innovative scientific solutions to address the growing global concern of selenium for the betterment of its inhabitants, ecosystems, industry, and regulatory bodies.

The Importance of Selenium Speciation

The topic of selenium has garnered attention in various industries for decades now, but the challenge associated with removing selenium from wastewaters has not diminished. In order to understand the most effective form of treatment for this unusual element that is...

BAL is On the Road Again…

The SETAC North America 39th Annual Meeting will be held in Sacramento November 4-8 this year. Come learn more about the unexpected ways alligators can potentially cause you harm you when Elizabeth Madonick, BAL Technical Services Specialist, presents a poster on the...

Quantifying Trace Selenium in Seawater

Brooks Applied Labs (BAL) is now offering the most innovative method commercially available for the quantitation of selenium in saline waters at concentrations as low as 5 ng/L (parts-per-trillion). BAL’s novel method utilizes in-line matrix component separation and...

BAL Continues to Expand Selenium Speciation Capabilities

Efficient selenium treatment and understanding ecological risks associated with the contaminant requires detailed molecular information to make educated decisions. As with any element, the molecular form of selenium, or chemical species, dictates how the element will...

In Case You Missed It: BAL Presentations February – April

If you follow our newsletters, you probably have noticed that BAL staff have had a busy winter and spring attending and presenting at many conferences around the country and even overseas. In case you missed any of the announcements or would like a copy of the...