Abstract
Summary
Recoveries of d, l-alphatocopherol from serum using a simple screening procedure were found to be satisfactory (95–100%). Poor recoveries (66–76%) using a second method involving aqueous solutions were due to traces of impurity in distilled water and were increased to 86–95% by the addition of disodium ethylenediaminetetraacetate (EDTA). It is recommended that EDTA be added to aqueous solutions used in procedures for extraction or measurement of tocopherol.
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