Environmental Laboratory

  • Overcome the memory effect in dioxins extraction

Overcome the memory effect in dioxins extraction

Jun 20 2019 Read 854 Times

According to environmental regulatory bodies across the world, dioxin and dioxin-like chemicals have been associated to adverse health effects in the population.

The analysis of this class of pollutants is fundamental for the environmental and human health protections. Many solutions are available for the extraction of dioxin such as Soxhlet, automated Soxhlet, sonication, pressurised liquid extraction and closed microwave vessels. A common and very critical issue in all sample preparation techniques is not only the dioxins extraction, but the subsequent memory effect/ carryover in the extraction cells. Milestone’s ETHOS X equipped with the unique fastEX24 rotor is specifically designed to overcome the memory effect and cleaning by using disposable glass vials as reaction vessels, which are placed into a pressure reactor. This approach leads to ensure the lowest analytical blanks and completely avoid carryover between runs.

The table shows recoveries of all the molecules in the range of 80-120% with great reproducibility (RSD%) and in addition, it shows the blank values of the following run with new disposable glass vials (all the blanks were below 0.065 µg/kg).

The ETHOS X enables simultaneous dioxins extraction of up to 24 samples in less than 1 hour, offering superior productivity than any other technology in the market. In addition, the use of contactless temperature control and disposable glass vials fully solves constant issues in Dioxins determination by avoiding tedious cleaning, memory effect and carryover. The ETHOS X with all its unique features fully addresses the need of environmental laboratories and it is fully in compliance with EPA 3546 method.

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