Spectrophotometric determination of mercury(II) and silver(I) with copper(II) and diethyldithiocarbamate in the presence of triton X-100

M C Alvarez-Coque; R M Camañas; M C Vaya; G R Ramos; C M Fernandez

doi:10.1016/0039-9140(86)80162-x

Spectrophotometric determination of mercury(II) and silver(I) with copper(II) and diethyldithiocarbamate in the presence of triton X-100

Talanta. 1986 Aug;33(8):697-9. doi: 10.1016/0039-9140(86)80162-x.

Authors

M C Alvarez-Coque¹, R M Camañas, M C Vaya, G R Ramos, C M Fernandez

Affiliation

¹ Departamento de Química Analítica, Facultad de Química, Universidad de Valencia, Burjasot Valencia, Spain.

PMID: 18964171
DOI: 10.1016/0039-9140(86)80162-x

Abstract

Procedures for the determination of mercury and silver by displacement of diethyldithiocarbamate (DDTC) from its copper complex in the presence of 1% Triton X-100, and measurement of the decrease in the Cu(DDTC)(2) absorbance, are described. The use of the surfactant avoids the need for an extraction step. Reproducibility within 1% and detection limits of 0.25 ppm Hg(II) and 0.45 ppm Ag(I) have been obtained, and linear calibration ranges up to 13 ppm Hg(II) and 15 ppm Ag(I). In the presence of 0.1M EDTA very good selectivity is achieved.