Study on the Optimization of Determining Bismuth and Antimony in water by Atomic Fluorescence Spectroscopy

The determination conditions of bismuth and antimony in water were established and optimized using atomic fluorescence spectroscopy method. The influencing factors were investigated, which included negative high voltage and lamp current, carrier gas and shielding gas flow, atomizer height, medium and acidity, potassium borohydride concentration and potassium ferricyanide concentration. The optimized conditions were as follows: negative high pressure 280V, lamp current 80mA, atomizer height 10mm, carrier gas flow 300mL/min, shielding gas flow 700ml /min, and medium hydrochloric acid, and acidity 5.0%, potassium borohydride concentration 1.0%. Under the optimized conditions, the standard curve was linear in 0 ~ 40μg/L with the correlation coefficient is 0.9997 and 0.9991, and the detection limit of 0.015 and 0.079μg/L. The precision was 0.51% ~ 1.96% and 0.60%~2.16%, with the recovery of 94.0%~98.5% and 86.0%~92.0%.