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Start Over Descriptor "domestic ceramics" Journal quimica nova
2 results on '"domestic ceramics"'

1. Decomposição ácida assistida por ultrassom para a determinação de Cu, Fe, Mg e Zn por F AAS em cerâmicas de uso doméstico

Author

Eliézer Quadro Oreste, Alexander Ossanes de Souza, Camila Corrêa Pereira, Mariana Antunes Vieira, and Anderson Schwingel Ribeiro

Subjects
domestic ceramics, metals, acid decomposition, ultrasound, F AAS, Chemistry, QD1-999
Abstract

This paper describes a sample preparation method for domestic ceramics, based on the acid decomposition assisted by ultrasound for further determination of Cu, Fe, Mg and Zn by Flame Atomic Absorption Spectrometry technique. The main optimized conditions were: particle size (25 µm); sample mass (25 mg) and the acid volume (0.5 mL of HNO3 and 0.5 mL of HF). The samples were placed in an ultrasonic bath for 2 hours at 40 ºC. The method was employed for eight commercial samples of domestic ceramic, which showed different concentrations for all analytes investigated, showing the existing variety of raw materials. The method showed good accuracy and precision, attested by the addition and recovery test, with values of 87 to 112% for all analytes and relative standard deviation lower than 3.0%.

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2. Decomposição ácida assistida por ultrassom para a determinação de Cu, Fe, Mg e Zn por F AAS em cerâmicas de uso doméstico

Author

Anderson Schwingel Ribeiro, Eliézer Quadro Oreste, Mariana Antunes Vieira, Alexander Ossanes de Souza, and Camila Corrêa Pereira

Subjects
Accuracy and precision, Relative standard deviation, Analytical chemistry, metals, 02 engineering and technology, 01 natural sciences, lcsh:Chemistry, Flame atomic absorption spectrometry, acid decomposition, Sample preparation, Ceramic, Chemistry, ultrasound, 010401 analytical chemistry, Sample mass, F AAS, General Chemistry, 021001 nanoscience & nanotechnology, Decomposition, 0104 chemical sciences, lcsh:QD1-999, visual_art, visual_art.visual_art_medium, domestic ceramics, Particle size, 0210 nano-technology
Abstract

This paper describes a sample preparation method for domestic ceramics, based on the acid decomposition assisted by ultrasound for further determination of Cu, Fe, Mg and Zn by Flame Atomic Absorption Spectrometry technique. The main optimized conditions were: particle size (25 µm); sample mass (25 mg) and the acid volume (0.5 mL of HNO3 and 0.5 mL of HF). The samples were placed in an ultrasonic bath for 2 hours at 40 oC. The method was employed for eight commercial samples of domestic ceramic, which showed different concentrations for all analytes investigated, showing the existing variety of raw materials. The method showed good accuracy and precision, attested by the addition and recovery test, with values of 87 to 112% for all analytes and relative standard deviation lower than 3.0%.

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