ACID DECOMPOSITION ASSISTED BY ULTRASOUND FOR DETERMINATION OF Cu, Fe, Mg AND Zn BY F AAS IN DOMESTIC CERAMICS

作者：Oreste Eliezer Quadro; de Souza Alexander Ossanes; Pereira Camila Correa; Vieira Mariana Antunes; Ribeiro Anderson Schwingel^*

来源：Quimica Nova, 2017, 40(3): 310-316.

DOI：10.21577/0100-4042.20170013

• domestic ceramics
• metals
• acid decomposition
• ultrasound
• F AAS.

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 mu m); 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 degrees 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%.

• 出版日期2017-4