Journal Highlight: Tenax extraction as a simple approach to improve environmental risk assessments

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  • Published: Aug 17, 2015
  • Author: separationsNOW
  • Channels: Sample Preparation
thumbnail image: Journal Highlight: Tenax extraction as a simple approach to improve environmental risk assessments
The use of Tenax extraction for assessing the bioavailability of hydrophobic organic compounds in sediments is discussed along with a Tenax bioaccumulation model for multiple compounds.

Tenax extraction as a simple approach to improve environmental risk assessments

Environmental Toxicology and Chemistry, 2015, 34, 1445-1453
Amanda D. Harwood, Samuel A. Nutile, Peter F. Landrum and Michael J. Lydy

Abstract: It is well documented that using exhaustive chemical extractions is not an effective means of assessing exposure of hydrophobic organic compounds in sediments and that bioavailability-based techniques are an improvement over traditional methods. One technique that has shown special promise as a method for assessing the bioavailability of hydrophobic organic compounds in sediment is the use of Tenax-extractable concentrations. A 6-h or 24-h single-point Tenax-extractable concentration correlates to both bioaccumulation and toxicity. This method has demonstrated effectiveness for several hydrophobic organic compounds in various organisms under both field and laboratory conditions. In addition, a Tenax bioaccumulation model was developed for multiple compounds relating 24-h Tenax-extractable concentrations to oligochaete tissue concentrations exposed in both the laboratory and field. This model has demonstrated predictive capacity for additional compounds and species. Use of Tenax-extractable concentrations to estimate exposure is rapid, simple, straightforward, and relatively inexpensive, as well as accurate. Therefore, this method would be an invaluable tool if implemented in risk assessments.

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