Determination of the content of total tin in solid waste by atomic fluorescence spectrometry
An analytical method for the determination of the mass fraction of total tin in solid waste by atomic fluorescence spectrometry using hydrofluoric,acid-hydrochloric,and acid-nitric as the digestion system was established.Comparing the experimental effects of different acid media,reducing agents and masking agents,the correlation coefficient of the calibration curve of this method for elemental tin was stable at 0.999 8 under optimal working conditions,and the limit of detection(LOD)was 0.06 mg/kg.The RSD of the GSS-4a was calculated to be 3.58％for eight parallel determinations.The relative errors of four standard samples with different mass fractions of tin from low to high are-3.85％～4.11％.The recoveries of the method ranged from 93.7％to 107.0％at three spiked levels of 8 μg/L,4 μg/L and 2 μg/L.The method has a low detection limit,high stability and high operability,which can meet the requirements of laboratory detection of the mass fraction of total tin in solid waste,improve detection efficiency,and is suitable for the daily analysis of large quantities of samples.
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