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Soil quality. Environmental availability of non-polar organic compounds. Determination of the potentially bioavailable fraction and the non-bioavailable fraction using a strong adsorbent or complexing agent
This document specifies an extraction method to determine the bioavailable (potential and environmental available) fraction and the non-bioavailable fraction of a contaminant in soil using a “receiver phase” for an organic contaminant with strong sorbing or complexing properties, for example, Tenax® 1 or cyclodextrin, respectively.
Tenax ® is an example of a suitable product available commercially. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of this product.
The bioavailable fraction is defined in ISO 17402 as environmental bioavailability.
The method is applicable for non-polar organic contaminants with an aqueous solubility of < 100 mg/l. The method is applicable for soil and soil-like material including (dredged) sediments.
The method is theoretically applicable to non-polar organic contaminants with an aqueous solubility of 1 000 mg/l. The method has been often applied for compounds with a much lower solubility (Kow > 3) and less for compounds with a higher solubility. The applicability is therefore defined for compounds with an aqueous solubility of < 100 mg/l.
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