Study of the reaction between Hg(l) and ethyleneglycol bis (&beta;-aminoethylether) tetraacetate. Spectrophotometric determination of Hg<sub>2</sub><sup>2+</sup>

Authors

  • C. Sánchez Pedreño Centro Coordinado C.S.l.C. Departamento de Química Analítica Facultad de Ciencias. Murcia
  • M. Hernández Cordoba Centro Coordinado C.S.l.C. Departamento de Química Analítica Facultad de Ciencias. Murcia
  • G. Martínez Tudela Centro Coordinado C.S.l.C. Departamento de Química Analítica Facultad de Ciencias. Murcia
  • I. Albero Quinto Centro Coordinado C.S.l.C. Departamento de Química Analítica Facultad de Ciencias. Murcia

Abstract

The reaction between Hg(I) and ethyleneglycol bis (β-aminoethylether)- N, N, N3, N3 tetraacetate (EGTA) in a weakly acidic médium (pH ≈ 5) is studied by U. V. spectrophotometric techniques. The maxiraum of absorption which appears at 247 nm is supposed due to the formation of a Hg(I) - EGTA complex. This compotmd is unstable and it decomposes slowly with formation of Hg(II) chelate and metallic mercury. When the absorbance is measured at fixed time (5 minutes), it is fovmd that Beer's law is obeyed from 1 up to 30 p p m of Hg(I) at 247 nm.

Issue

Section

Artículos