GF-AAS Determination of Amount of Barium Dissolved from Ceramic Tablewares

Sample of ceramic tableware was digested with a mixture of HNO3 and HF(3+1) in a microwave digestor or extracted by acetic acid (4+96) solution, and barium in the sample solution was determined by GF-AAS. Temperatures selected for ashing and atomization were 1 050 ℃ and 2 600 ℃ respectively. Linearity ranges of barium were found between 20.0-100 μg·L-1 for samples treated by extraction with HOAc and between 10.0-100 μg·L-1 for sample treated by microwave assisted digestion, with detection limits (3S/N) of 0.080 μg·L-1 and 0.029 μg·L-1 respectively. The proposed method was used in the analysis of ceramic tableware samples, values of recovery found by standard addition method were in the range of 94.2%-98.8% with RSD′s (n=5) in the range of 2.6%-3.5%.