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 (ISO 16751:2020)
This document specifies an extraction method to determine the bioavailable (potential andenvironmental 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.NOTE 1 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.NOTE 2 The method is theoretically applicable to non-polar organic contaminants with an aqueous solubilityof 1 000 mg/ l. The method has been often applied for compounds with a much lower solubility (Kow > 3) and lessfor compounds with a higher solubility. The applicability is therefore defined for compounds with an aqueoussolubility of < 100 mg/ l.
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