Abstract:A sensitive spectrophotometric method for the determination of ethylenediaminetetraacetic acid (EDTA) in foods is described. The method involves the reaction of EDTA with Fe3+ to produce the EDTA-Fe chelate, followed by the removal of excess of Fe3+ by a chelate extraction technique using chloroform and N-benzoyl-N-phenylhydroxylamine and the formation of a chromophore with 4,7-diphenyl-1,10-phenanthroline-disulfonic acid. The calibration graph was linear in the range 0.5-40.0 micrograms cm-3 of EDTA with a sl… Show more
“…3). In accordance with previous observations [17] the percentage of Cu removal did not follow the increase in EDTA concentration. Cu and other heavy metals are present in soil in various chemical forms and bound to different soil fractions.…”
Section: Optimization Of Soil Leaching Conditionssupporting
confidence: 93%
“…Samples of washing and soil rinsing solution were filtrated (filter paper grade 391, 84 g m −2 ) and EDTA determined spectrophotometrically according to the procedure of Hamano et al [17].…”
“…3). In accordance with previous observations [17] the percentage of Cu removal did not follow the increase in EDTA concentration. Cu and other heavy metals are present in soil in various chemical forms and bound to different soil fractions.…”
Section: Optimization Of Soil Leaching Conditionssupporting
confidence: 93%
“…Samples of washing and soil rinsing solution were filtrated (filter paper grade 391, 84 g m −2 ) and EDTA determined spectrophotometrically according to the procedure of Hamano et al [17].…”
“…Samples of washing and soil rinsing solution were centrifuged at 2880 × g for 30 min and EDTA determined spectrophotometrically according to the procedure of Hamano et al [25].…”
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