微波消解-石墨炉原子吸收法研究益智及土壤中的铅含量

RESEARCH ON THE Pb CONTENT IN ALPINIA OXYPHYLLA MIG AND ITS SOIL BY GFAAS

采用微波消解前处理方法,石墨炉原子吸收法研究了四大南药之一的益智不同器官及生长地土壤中重金属铅的含量。铅在益智不同器官内分布为:实根2.0244mg/kg、须根2.9428mg/kg、茎0.2232mg/kg、叶1.0228mg/kg、花0.0203mg/kg,果实中未检测出铅,土壤中铅含量分别为:表层26.2932mg/kg、中层24.4341mg/kg、深层12.3529mg/kg。结果表明,益智各器官及土壤中的铅含量远低于国家限量标准,说明海南地理环境有利于益智的种植。

Pb content in soil and different organs of alpinia oxyphylla mig was studied by graphite furnace atomic absorption spectrophotometry(GFAAS).Alpinia oxyphylla mig was one of the four South-China Medicine.The results showed that Pb in different organs of alpinia oxyphylla mig were 2.024 4 mg/kg for real roots,2.942 8 mg/kg for fibrous roots,0.223 2 mg/kg for stems,1.022 8 mg/kg for leaves,0.020 3 mg/kg for flower,respectively.No Pb was detected in fruit.The Pb content of surface,middle and deep in soil was 26...