Objective: To evaluate the residues of heavy metals and harmful elements in soil of Province County Jiulong County Gastrodia elata planting base and Gastrodiae Rhizoma

so as to improve the safety evaluation of Gastrodia elate planting. Method: After collecting samples

lead

cadmium and copper contents were determined by atomic absorption spectrometry

and mercury and arsenic contents were detected by atomic fluorescence spectrophotometry

which were adopted as the evaluation criteria for heavy metal content and harmful elements of all samples. Result: The five measured heavy metals and harmful elements in the selected range showed a good linear relationship (r≥0.999)

detection limits of lead

cadmium

copper

mercury

arsenic were 8

0.03

10

4

6 μg·kg-1

with the recovery RSD<2.2%

precision RSD<1.3%

and repeatability RSD<0.9%

indicating that the method is feasible. The established method was used to determine heavy metals and harmful elements of samples held. The results showed that the soil samples conformed to the Soil Environmental Quality Standards (GB15618-1995)

and medicine samples were consistent with the Green Industry Standard for Import and Export of Medicinal Plants and Preparations. Conclusion: Soil and herbs in the G. elata planting base conform to GAP standards for lead

cadmium

copper

mercury and arsenic.