Validação de método analítico por extração líquido-líquido e análise por cromatografia gasosa acoplada à espectrometria de massas para detecção de ácidos haloacéticos em amostras ambientais
The objective of the study was to develop and validate an analytical method for the detection and quantification of haloacetic acids through liquid-liquid extraction and gas chromatography-mass spectrometry analysis. For validation, parameters such as linearity, precision, detection and quantificati...
| Autores: | , , , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | Brasil |
| Recursos: | Universidade Federal de Minas Gerais (UFMG) |
| Repositorio: | Repositório Institucional da UFMG |
| Idioma: | portugués |
| OAI Identifier: | oai:repositorio.ufmg.br:1843/55310 |
| Acesso em linha: | https://doi.org/10.1590/S1413-415220200050 http://hdl.handle.net/1843/55310 http://orcid.org/0000-0001-5296-4790 https://orcid.org/0000-0001-5452-940X https://orcid.org/0000-0001-6088-5232 https://orcid.org/0000-0002-0978-7474 https://orcid.org/0000-0002-2524-8534 |
| Access Level: | acceso abierto |
| Palavra-chave: | Ácidos haloacéticos Extração líquido-líquido Cromatografia gasosa Espectrometria de massas Cylindrospermopsis raciborskii Cromatografia gasosa - Manuais, guias, etc Espectrometria |
| Resumo: | The objective of the study was to develop and validate an analytical method for the detection and quantification of haloacetic acids through liquid-liquid extraction and gas chromatography-mass spectrometry analysis. For validation, parameters such as linearity, precision, detection and quantification limits, and selectivity were considered. Additionally, the method was applied to evaluate the formation of haloacetic acids in in Cylindrospermopsis raciborskii cell chlorination assays with the calcium hypochlorite oxidant, simulating full scale situations in water treatment plants. The method presented low analysis time, excellent selectivity, precision, repeatability, and sensitivity, with possibility of application for routine analysis in substitution gas chromatography by electron capture. The formation of haloacetic acids was observed during the tests with 2.5 and 5.0 mg.L-1 doses of the oxidant, with emphasis on dichloroacetic and trichloroacetic acids. |
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