Validação de metodologia analítica para determinação de mercúrio total em amostras de urina por espectrometria de absorção atômica com geração de vapor frio (CV-AAS): estudo de caso

Guilhen, Sabine Neusatz; Pires, Maria Aparecida Faustino; Dantas, Elizabeth Sonoda Keiko; Xavier, Fernanda Villibor

doi:10.1590/s0100-40422010000600013

Cited by 9 publications

(7 citation statements)

References 6 publications

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“…44 After simultaneous analysis of the data, it was observed that the optimum conditions to maximize temperature of thermal decomposition are that of experiment 7. The combination of 150 mmol of MMA, 23 mmol TMSM, 0.186 mmol BPO and 0.150 g H + Mt resulted in a T d of 381 °C, being considered, therefore, the ideal condition to obtain nanocomposites with improved thermal properties.…”

Section: Thermal and Statistical Analysismentioning

confidence: 99%

Factorial Design Applied for Evaluation of Effect of Interactions among Precursors on the Thermal Decomposition Temperature of Montmorillonite/Poly(Methyl Methacrylate) Nanocomposites

Santana¹,

Araújo²,

Jesus³

et al. 2017

J. Braz. Chem. Soc.

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Section: Thermal and Statistical Analysismentioning

confidence: 99%

Factorial Design Applied for Evaluation of Effect of Interactions among Precursors on the Thermal Decomposition Temperature of Montmorillonite/Poly(Methyl Methacrylate) Nanocomposites

Santana¹,

Araújo²,

Jesus³

et al. 2017

J. Braz. Chem. Soc.

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“…A linearidade corresponde à capacidade do método de fornecer resultados diretamente proporcionais à concentração da substância, dentro de uma determinada faixa de aplicação (GUILHEN et al, 2010;RIBANI et al, 2004) …”

Section: Linearidadeunclassified

“…A sensibilidade do método é determinada pelo limite de detecção e quantificação (BONATO; JABOR; de OLIVEIRA, 2010), que são particularmente úteis quando o analito que se deseja mensurar está presente em quantidades muito baixas na amostra (GUILHEN et al, 2010). O limite inferior de quantificação (LIQ) é a menor concentração do analito que pode ser determinada quantitativamente com precisão e exatidão (BONATO; JABOR; de OLIVEIRA, 2010;GONZALEZ;HERRADOR, 2007;ROZET et al, 2011).…”

Section: Limite De Quantificaçãounclassified

Avaliação da microextração líquido-líquido dispersiva para análise de oxibutinina e de N-desetiloxibutinina em urina por eletroforese capilar

Moreira¹

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“…A urina é considerada o melhor indicador biológico de exposição (IBE) ou biomarcador da carga corporal de mercúrio para exposição em longo prazo ao mercúrio elementar e inorgânico (Naleway et al, 1985;Mason et al, 2001;Karahalil et al, 2005;Guilhen et al, 2010). A determinação de mercúrio em urina é confiável e simples, permitindo identificar rapidamente os indivíduos com níveis de mercúrio elevados (Naleway et al, 1985;Karahalil et al, 2005).…”

Section: Seleção Do Indicador Biológico De Exposição: Urinaunclassified

“…Em relação às coletas de amostras de urina com a finalidade de dosagem de creatinina e de metais, Mason et al (2001) (Guilhen 2009;Guilhen et al, 2010).…”

Section: Procedimento De Coleta E Determinação De Mercúrio Na Urinaunclassified

Avaliação dos níveis de exposição ocupacional ao mercúrio nos consultórios públicos de Araguaína,TO

Xavier¹

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The aim of this work was to evaluate the occupational risks of exposure to mercury utilized in dentistry, to which dental auxiliaries from the public health system of the city of Araguaína, Tocantins, Brazil are exposed. The dentistry process from the city health system was rigorously studied based on an assessment, in the DATASUS database, of the number of amalgam restorations conducted in the period from January 2003 to December 2009. In this study, we evaluated the storage conditions of mercury residuals in the public dental offices in the studied municipality. Different barrier solutions for the storage of mercury residuals were studied regarding their efficacy in controlling the emission of mercury vapor in the environment. The solution containing ammonia presented the best time of storage of residuals (19 days at 37 °C), followed by the so lution containing photographic fixative (12 days) and the sodium bicarbonate solution (7 days). Based on these information, a profile of the dental auxiliaries actuating in the public dental offices of the city of Araguaína was characterized according to age, sex, level of exposure to mercury and conducted biosecurity procedures. The study allowed the elaboration of a database regarding handling and discard of amalgam residuals, with the purpose to assist public health policies to modify risk situations to which the professionals and/or their patients are exposed. A biological monitoring program was also carried out using as marker the presence of mercury in urine samples (HgU) from members of the dentistry team of the Araguaína public health system and from students from the Araguaína unit of the health care technical school who actuated as dental auxiliaries in other municipalities of the north region of the state (n=91). For comparison, a group of "not exposed" to mercury was evaluated (n=43), determining their HgU values. The research allowed to conclude that the HgU values from the dentistry team were within the limits set by Regulatory Norm nº 7 by the Brazilian Ministry of Labor (up to 35 µgHg.g-1 CR). Regarding mercury contamination, the average HgU concentration for the "exposed" group (5,61 µgHg.g-1 CR) was approximately 8 times higher when compared to the values from the "not exposed" group (0,65 µgHg.g-1 CR), making evident the need for a professional training and residuals management program, as well as for a more effective actuation in the realization of periodical biological monitoring in the professionals from the dentistry team.

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Validação de metodologia analítica para determinação de mercúrio total em amostras de urina por espectrometria de absorção atômica com geração de vapor frio (CV-AAS): estudo de caso

Cited by 9 publications

References 6 publications

Factorial Design Applied for Evaluation of Effect of Interactions among Precursors on the Thermal Decomposition Temperature of Montmorillonite/Poly(Methyl Methacrylate) Nanocomposites

Factorial Design Applied for Evaluation of Effect of Interactions among Precursors on the Thermal Decomposition Temperature of Montmorillonite/Poly(Methyl Methacrylate) Nanocomposites

Avaliação da microextração líquido-líquido dispersiva para análise de oxibutinina e de N-desetiloxibutinina em urina por eletroforese capilar

Avaliação dos níveis de exposição ocupacional ao mercúrio nos consultórios públicos de Araguaína,TO

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