Anugrah Ricky Wijaya, Doni Sukma Pradana, Retno Palupi Pangeswara, Hanumi Oktiyani Rusdi, Md. Anwar Hossain
In order to analyze Fe in material sediment associated with its accuracy and precision, the interferences of Al^{3+} ion was applied to examine the optimized condition of leached Fe in the model BCR and Tessier microwave methods. The material sediment was collected in the Gulf of Prigi. The varied moles of Al^{3+} started from 0.002 to 0.051 mole was added in the BCR and Tessier microwave model and tested by their 4 or 5 fractions. The results indicated the interferences Al affected the accuracy and precision values of Fe analysis in both methods. This impact caused the resulting of low accuracy values in the range of 23.2-35.2% for leaching Fe in the BCR and 17.5-23.2% in Tessier methods compared to those in the certified reference standard sediment (SRM-981). The effect of interferences Al^{3+} also caused the high %RSD of leached Fe in the range of 6.05-20.7 and 8.08-80.4 in the BCR and Tessier methods, respectively. This is due to the Al^{3+} ion reacted with solvents in the leached Fe in sediment fraction. The competition of Fe^{3+} and Al^{3+} is easily formed as a refractory compound in the AAS burner which has an impact on the reduced atomization of Fe concentration measurements. The impact of Al^{3+} interference causes the lower percent recovery and highly percent RSD value. © 2021 IEEE.
Universitas Negeri Malang (UM), Department of Chemistry, Indonesia Malang, Indonesia; Electrical Electronic Engineering, Department BUBT, Bangladesh
