Determination of Microelements in Ginkgo Leaves by Flame Atomic Absorption Spectrometry

The content of Fe,Mn,Zn and Cu in Ginkgo leaves were determined by microwave digestion-flame atomic absorption spectrometry.In this experiment,the content of four microelements including Fe,Mn,Zn and Cu(μg/g) was 365.7,24.3,13.6,8.7 respectively in the sample collected from campus of Shaanxi University of Technology;283.1,20.7,10.2,9.4 respectively in Hantai;395.0,30.5,19.3,18.0 respectively in Chenggu;194.4,25.0,13.0,7.7 respectively in Nanzheng and 194.4,27.0,12.1,8.4 respectively in Mianxian;the limit of determination was Fe 0.015,Mn 0.019,Zn 0.0062 and Cu 0.006 μg/mL;the rate of recovery was 92%~110%.The content of four elements was FeMnZnCu in the same samples,and the content was higher in Chenggu than others.