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https://locus.ufv.br//handle/123456789/19404
Tipo: | Artigo |
Título: | Aqueous two-phase systems: a new approach for the determination of p-aminophenol |
Autor(es): | Rodrigues, Guilherme Dias Lemos, Leandro Rodrigues de Patrício, Pamela da Rocha Silva, Luis Henrique Mendes da Silva, Maria do Carmo Hespanhol da |
Abstract: | A new method has been developed for the spectrophotometric determination of p-aminophenol (PAP) in water, paracetamol formulations and human urine samples with a recovery rate between 94.9 and 101%. This method exploits an aqueous two-phase system (ATPS) liquid–liquid extraction technique with the reaction of PAP, sodium nitroprusside and hydroxylamine hydrochloride in pH 12.0, which produces the [Fe2(CN)10]^10− anion complex that spontaneously concentrates in the top phase of the ATPS (). The ATPS does not require an organic solvent, which is a safer and cleaner liquid–liquid extraction technique for the determination of PAP. The linear range of detection was from 5.00 to 500 μg kg^−1 (R ≥ 0.9990; n = 8) with a coefficient of variation of 2.11% (n = 5). The method exhibited a detection limit of 2.40 μg kg^−1 and a quantification limit of 8.00 μg kg^−1. The ATPS method showed a recovery that ranged between 96.4 and 103% for the determination of PAP in natural water and wastewater samples, which was in excellent agreement with the results of the standard 4-aminoantipyrine method that was performed on the same samples. |
Palavras-chave: | Aqueous two-phase system p-Aminophenol Water Clean method Waste |
Editor: | Journal of Hazardous Materials |
Tipo de Acesso: | Elsevier B.V. |
URI: | https://doi.org/10.1016/j.jhazmat.2011.05.023 http://www.locus.ufv.br/handle/123456789/19404 |
Data do documento: | 15-Ago-2011 |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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artigo.pdf Until 2100-12-31 | texto completo | 357,34 kB | Adobe PDF | Visualizar/Abrir ACESSO RESTRITO |
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