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方法:硝酸∶高氯酸(4+1)消解,火焰原子吸收光谱法对小葱葱须、葱白、葱叶中4种微量元素进行测定。结果:小葱中Fe、Mn、Zn、Cu元素含量丰富且不同部位含量存在差异,Fe、Mn、Zn、Cu含量分别为:小葱须630.6 mg/kg、116.2 mg/kg、210.3 mg/kg、28.40 mg/kg;小葱白214.0 mg/kg、41.00 mg/kg、236.4 mg/kg、22.00 mg/kg;小葱叶282.0 mg/kg、104.7 mg/kg、331.2 mg/kg、18.10 mg/kg。RSD≤1.586%,回收率在96%～108%之间,结果满意。
Methods: Four kinds of trace elements in onion, shallot and onion were determined by flame atomic absorption spectrometry with nitric acid: perchloric acid (4 + 1). Results: The contents of Fe, Mn, Zn and Cu in shallot were rich and the contents of different parts were different. The contents of Fe, Mn, Zn and Cu were 630.6 mg / kg, 116.2 mg / kg, 210.3 mg / kg and 28.40 Scallions 214.0 mg / kg, 41.00 mg / kg, 236.4 mg / kg, 22.00 mg / kg; Scallion leaves 282.0 mg / kg, 104.7 mg / kg, 331.2 mg / kg, 18.10 mg / kg; RSD≤1.586%, the recovery rate was between 96% and 108%, with satisfactory results.