MULTI-WAVELENGTH DETERMINATION OF COBALT BY TUNGSTEN COIL ATOMIC EMISSION SPECTROMETRY

Autor(es)

Donati, George L. ^[1] ; Gonzales, Mario H. ^[2] ; Nobrega, Joaquim A. ^[2] ; Jones, Bradley T. ^[1]

Afiliação do(s) autor(es)

^[1] Wake Forest Univ, Dept Chem, Winston Salem, NC 27109 - USA

^[2] Univ Fed Sao Carlos, Dept Chem, BR-13560 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Analytical Letters; v. 43, n. 10-11, p. 1723-1733, 2010.
• Citações Web of Science: 10

Resumo

A simple tungsten coil atomic emission device is used for the determination of Co in a polluted water sample. Multiple cobalt emission lines in the 340.5 to 352.7 nm range are detected simultaneously. Limits of detection at five different wavelengths ranged between 20 and 70 ng Co in a 25 mu L sample volume. Summing the signals for the five different Co emission lines improves the detection limit to 10 ng. The combination of the five lines also results in improved precision (2.2% relative standard deviation for a 4 mg/L Co solution) and accuracy (102% for a polluted water reference material). (AU)

• Processo FAPESP: 07/57564-2 - Aplicação analítica de espectrômetro de emissão atômica com atomização eletrotérmica em filamento de tungstênio
• Beneficiário: Joaquim de Araújo Nóbrega
• Modalidade de apoio: Bolsas no Exterior - Pesquisa