Enhancing microdialysis recovery of metal ions by incorporating poly-L-aspartic acid and poly-L-histidine in the perfusion liquid

摘要: Abstract A study of the evaluation poly- l -aspartic acid and -histidine as binding agents to enhance microdialysis recovery metal ions is presented. Investigations were carried out compare for Cr, Cu, Ni, Pb when using water perfusion liquid well various concentrations in liquid. All experiments under quiescent conditions a concentric type probe fitted with polysulfone membrane having 30 kDa molecular weight cut-off 10 mm effective dialysis length. The determined an electrothermal atomic absorption spectrometer equipped Zeemann background corrector. Incorporation 0.032% (w/v) enhanced Cu by factors 90 64%, respectively (%RSD resulted enhancement 66 4% Pb, selective that ions. Application optimised determination wastewater sample confirmed versatility microdialysis, higher recoveries obtained compared direct determination.