A reusable extractor for obtaining a representative sample of the exchangeable ions from {HEAD ~ a complex heterogeneously saturated ion exchange system} such as {TAIL ~ soil} or other complex and colloidal matrices at various oxidation reduction potentials without the need for costly extraction and purification steps 
A reusable extractor for obtaining a representative sample of the exchangeable ions from { HEAD ~ a complex heterogeneously saturated ion exchange system } such as { TAIL ~ soil } or other complex and colloidal matrices at various oxidation reduction potentials without the need for costly extraction and purification steps
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