通过对呼和浩特市主要大型超市的25种蔬菜75个样品中重金属Pb、Cd的含量进行测定，以期探明铅，镉两种重金属元素在蔬菜中的含量及分布规律。本试验采用石墨炉原子吸收光谱法测定样品的铅，镉含量。试验结果表明：不同蔬菜有不同程度的超标现象，其中超标最严重的为架豆，铅含量超过国标15倍，超标率100%，镉含量超标7倍之多，超标率33.3%，韭菜中的铅含量超标5倍多，超标率100%。试验结论：不同种类的蔬菜对相同的重金属元素以及相同的蔬菜对不同重金属元素富集吸收都存在明显的差异性；不同产地的蔬菜对重金属元素的富集吸收也存在差异性。%Through the investigation into the contents of two heavy metals cadmium (Cd) and lead (Pb) in 75 samples of vegetables from 25 varieties sold in large supermarkets in Hohhot, this test was conducted to determine the status quo of the contents and distributions of these two heavy metals in vegetables. Determination samples were tested by graphite furnace atomic absorption spectrometry to get the lead and cadmium contents. Different vegetable had exceeded the standard to different degree, of which the most serious excess was in beans, in which the lead contents exceeded the national standards by 15 times, with the exceeding rate 100%, and its cadmium contents exceeded the standards by 7 times, with the exceeding rate 33.3%; as to the leek, its lead contents exceeded the standards by 5 times, with the exceeding rate 100%. Different varieties of vegetables to the same heavy metal element, or the same vegetable to different heavy metal elements, the heavy metal enrichment absorption showed significant differences, and as to the same vegetable produced in different area, the accumulation of the heavy metal absorption also showed differences.
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