A rapid and simple capillary electrophoresis method for indirect determination of the biocide 2,2-dibromo-3-nitrilo-propionamide (DBNPA) in cooling waters

Autor(es)

Shiroma, Leticia S. ^[1] ; Marques, Thais T. ^[1] ; Jesus, Dosil P. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, UNICAMP, Inst Chem, BR-13083970 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, Inst Nacl Ciencia & Tecnol Bioanalit, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: WATER SCIENCE AND TECHNOLOGY; v. 71, n. 3, p. 434-439, 2015.
• Citações Web of Science: 0

Resumo

A capillary zone electrophoresis (CE) method was developed for the determination of the biocide 2,2-dibromo-3-nitrilo-propionamide (DBNPA) in water used in cooling systems. The biocide is indirectly determined by CE measurement of the concentration of bromide ions produced by the reaction between the DBNPA and bisulfite. The relationship between the bromide peak areas and the DBNPA concentrations showed a good linearity and a coefficient of determination (R-2) of 0.9997 in the evaluated concentration range of 0-75 mu mol L-1. The detection and quantification limits for DBNPA were 0.23 and 0.75 mu mol L-1, respectively. The proposed CE method was successfully applied for the analysis of samples of tap water and cooling water spiked with DBNPA. The intra-day and inter-day (intermediary) precisions were lower than 2.8 and 6.2%, respectively. The DBNPA concentrations measured by the CE method were compared to the values obtained by a spectrophotometric method and were found to agree well. (AU)

• Processo FAPESP: 13/22485-6 - Desenvolvimento e aplicação de eletroextração em membrana em métodos eletroforéticos de análises
• Beneficiário: Dosil Pereira de Jesus
• Modalidade de apoio: Auxílio à Pesquisa - Regular