D. Salcedo, T. B. Onasch, A. C. Aiken, L. R. Williams, B. de Foy, M. J. Cubison, D. R. Worsnop, L. T. Molina, and J. L. Jimenez Centro de Investigaciones Quı́micas, Universidad Autónoma del Estado de Morelos, Cuernavaca, México Center for Aerosol and Cloud Chemistry, Aerodyne Research, Billerica, MA, USA Cooperative Institute for Research in the Environmental Sciences (CIRES) and Department of C...

A highly selective, rapid and economical differential pulse polarographic method has been developed for the determination of trace amounts of cadmium and lead present together in various standard alloys and biological samples after adsorption of their 1-(2-pyridylazo)-2-naphthol complexes on microcrystalline naphthalene. Cadmium and lead complexes are equantitatively adsorbed on microcrysta...

background: presence of heavy metals in leachate due to the biological accumulation characteristics of these materials endangered the living creatures' health especially human. purpose of this study is to study and investigate the possibility of two metals' absorption i.e, lead and cadmium from leachate by natural zeolite clinopteliolit and increase of the ability to absorb the zeolite by modif...

A partial least squares (PLS) calibration model was developed for the simultaneous spectrophotometricdetermination of Pb (ΙΙ), Cu (ΙΙ) and Ni (ΙΙ) using xylenol orange as a chromogenic reagent. The parameterscontrolling behavior of the system were investigated and optimum conditions were selected. The calibrationgraphs were linear in the ranges of 0.0–9.091, 0.0–2.719 and 0.0–2.381 ppm for lead...