Abstract: Determination of selenium content in mulberry leaf tea by ultrasonic-assisted hydride generation atomic fluorescence spectrometry has the advantages of simple operation,short time period and accurate result. The detection curve equation is I=119.495 1C-0.564 1,the correlation coefficient R=0.999 8, the recovery range is 92.38%~107.13%, the average recovery rate is 98.89%. The results showed that Sanyang town mulberry leaf tea selenium content reached the highest, reaching 1.771 5 mg/kg, Guangfo town mulberry leaf tea content is the lowest,only 0.012 1 mg/kg. Sanyang Town and Xihe Town produced by the mulberry leaf tea,gingko leaf tea and Xinglong town of Eucommia leaf tea have reached the standard of selenium.

Key words: ultrasonic, atomic fluorescence, mulberry leaf tea, selenium content