Ethylenediaminotetraacetic acid

EDTA = ethylenediaminotetraacetic acid, NTA = nitrilotriacetic acid, DMA = dimethyl-anthranilic acid, PAS = p-aminosalicyclic acid. 

As an example for the reversible reaction succeeding the reversible charge transfer the anodic wave of cadmium amalgam in solutions of ethylenediaminotetraacetic acid (H4Y) has been chosen [14b], The wave is governed by two factors, i.e., by the diffusion and chemical follow-up reaction in which the product, solvated Cd- ions, react under the formation of electroinactive CdY complex ... 

Substoichiometric extraction of ion-association complexes is generally restricted to higher concentration levels (e.g., determination of Na, P). Water-soluble complexes of more than 20 metals with ethylenediaminotetraacetic acid can be used for substoichiometric determination at concentrations below 1 ng/g, provided that the excess of unreacted metal is separated by liquid-liquid di.stribution, ion-exchange, carrier coprecipitation, or other suitable means. Selectivity is high and can be further increased by masking reagents. 

The method described herein for the analysis of volatile organics is a modified procedure of that described by Schuberth (28). Aliquots of 10-20 mL of blood are obtained from the test subjects with the use of a Vacutainer and collected into 10-mL tubes containing 15 mg of ethylenediaminotetraacetic acid (EDTA) and 100 mg of NaF as anticoagulant and preservative, respectively. The samples are then stored at 4°C. Aliquots of 1.5 mL of blood are then added to a headspace vial containing 1.8 g of NaCl. Headspace extraction is done at a bath temperature of 50°C and an equilibrium time of 30 min. 

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