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

Eliézer Quadro Oreste, Alexander Ossanes Souza, Camila Corrêa Pereira, Mariana Antunes Vieira, Anderson Schwingel Ribeiro
2017 Química Nova  
ACID DECOMPOSITION ASSISTED BY ULTRASOUND FOR DETERMINATION OF Cu, Fe, Mg AND Zn BY F AAS IN DOMESTIC CERAMICS. 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 HNO 3 and 0.5 mL of HF). The samples were placed in
more » ... les were placed in an ultrasonic bath for 2 hours at 40 °C. 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%.
doi:10.21577/0100-4042.20170013 fatcat:b5y4o74njbd3jp3amdoqnxjt6m