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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Determination of tetrakis(hydroxymethyl)phosphonium sulfate in commercial formulations and cooling water by capillary electrophoresis with contactless conductivity detection

Texto completo
Autor(es):
Marques, Thais Tamye [1] ; Shiroma, Leticia Sayuri [1] ; de Jesus, Dosil Pereira [1, 2]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, UNICAMP, Inst Chem, BR-13083970 Campinas, SP - Brazil
[2] Inst Nacl Ciencia & Tecnol Bioanalit, Campinas, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF SEPARATION SCIENCE; v. 38, n. 5, p. 852-857, MAR 2015.
Citações Web of Science: 6
Resumo

A novel capillary electrophoresis method using capacitively coupled contactless conductivity detection is proposed for the determination of the biocide tetrakis(hydroxymethyl)phosphonium sulfate. The feasibility of the electrophoretic separation of this biocide was attributed to the formation of an anionic complex between the biocide and borate ions in the background electrolyte. Evidence of this complex formation was provided by B-11 NMRspectroscopy. A linear relationship (R-2 = 0.9990) between the peak area of the complex and the biocide concentration (50-900 mu mol/L) was found. The limit of detection and limit of quantification were 15.0 and 50.1 mu mol/L, respectively. The proposed method was applied to the determination of tetrakis(hydroxymethyl)phosphonium sulfate in commercial formulations, and the results were in good agreement with those obtained by the standard iodometric titrationmethod. Themethod was also evaluated for the analysis of tap water and cooling water samples treated with the biocide. The results of the recovery tests at three concentration levels (300, 400, and 600 mu mol/L) varied from 75 to 99%, with a relative standard deviation no higher than 9%. (AU)

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