Optimization of the Experimental Method for the Determination of Thallium in Water by Precipitation Enrichment Method
In this paper,hydrogen peroxide was used to replace bromine water as oxidant,and the water sample was pre-treated by precipitation enrichment method at a specific centrifuge rotational speed,and the analytical conditions were optimized to achieve the purpose of saving time,improving accuracy and obtaining better measurement results.The detection limit,precision,accuracy and adding standard recovery of the improved method were verified by graphite furnace atomic absorption spectrometer.The results show that the use of hydrogen peroxide and high rotational speed can make the experiment easier and the sample recovery is higher.It has been proved that when the amount of H2O2 is 2 mL,10 000 r/min centrifuge rotational speed and specific instrument conditions,the determination of thallium content in water samples by graphite furnace atomic absorption spectrometer can meet the requirements in terms of detection limit,precision and accuracy.
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