The complexation of Cr(III) with EDTA was achieved by adding the appropriate amounts of Cr(III), EDTA and water into 15mL polypropylene tubes and heating the tubes in a water bath set to at 80 ◦C for 20 min.
The complexationof Cr(III) with EDTA was achieved by adding the appropriateamounts of Cr(III), EDTA and water into 15mL polypropylenetubes and heating the tubes in a water bath set to at 80 ◦C for20 min.