Flame atomic absorption determination of zirconium in glass and refractory bricks after coprecipitation with aluminum hydroxide

Publication date: Available online 21 December 2015 Source:Journal of Taibah University for Science Author(s): Ardeshir Shokrollahi, Masoud Gohari A simple preconcentration method of zirconium based on coprecipitation with aluminum hydroxide prior to flame atomic absorption (FAAS) determination was established. The recovery values of analyte ions were higher than 95%. The parameters including types of hydroxide ion source for precipitation, acid type for dissolution step, amount of Al3+ ion as collector, pH, temperature, standing and centrifuge time were optimized, using 50mL of solution containing 150μg of zirconium. The effect of solution volume and influences of matrix ions on the extraction of the analyte were also examined. Under optimum conditions, the calibration curve was linear up to 10mgL−1. The relative standard deviation for solutions containing 150μg of zirconium was found to be 3.9%. The limit of detection (LOD) and limit of quantitation (LOQ) were calculated as 0.17 and 0.57mgL−1, respectively. The method is capable of extracting analyte in different samples, with volumes up to 250mL. The preconcentration factor for 250mL and enhancement factor for 50mL analyte solution were calculated to be 250 and 40, respectively. The proposed method was successfully applied for the determination of zirconium in glass and zirconium content refractory samples.

Source: Journal of Taibah University for Science - December 22, 2015 Category: Science Source Type: research