摘要
研究不同种类野生食用菌的重金属富集规律,对野生食用菌食品安全评估和为土壤重金属污染寻找合适的指示生物提供科学依据.采用原子吸收光谱仪测定了采集于四川攀枝花的19种野生食用菌中Cu、Zn、Ni、Cd和Cr的含量.结果显示:除食用鹅膏菌和香菇中Cu含量稍低于卫生标准外,19种野生食用菌中5种重金属含量全部超标,食用不甚安全.很多蕈菌对重金属具有较强的富集能力.Cu、Zn、Ni、Cd和Cr的最高富集量分别达到47.7 mg/kg(小白蚁伞)、188.6 mg/kg(鸡枞)、21.2 mg/kg(美味牛肝)、21.8 mg/kg(大白菇)和27.2 mg/kg(白蜡伞),其中Cr和Cd的富集浓度普遍高于其他研究结果,Cu、Zn和Ni与其他文献报道一致.
Accumulation of heavy metal in different wild mushroom species was studied to provide a scientific basis for evaluating the safety of the wild edible mushrooms and choosing the desirable bioindicators of environment contamination. The concentrations of five heavy metals （copper, zinc, nickel, chromium and cadmium） in fruiting bodies of 19 wild growing mushroom species from Panzhihua, China were determined, using atomic absorption spectrometer （Varian SpectrAA 220）. The results show that the contents of five heavy metals in all mushrooms exceeded Chinese statutory standards limit, except Cu in Amanita esculenta and Lentinus edodes. It is not safe for food. Most of the wild mushrooms can enrich heavy metals. Maximal concentrations of heavy metals were determined in Terrnitomyces microcarpus for copper （47.7 mg/kg）, Terrnitornyces albuminosus for zinc （188.6 mg/kg）, Boletus edulis for nickel （21.2 mg/kg）, Russula delica for cadmium （21.8 mg/kg）, and Boletus aereus for chromium （27.2 mg/kg）, respectively. Cadmium and chromium content of wild mushrooms were generally higher than the previous studies. Copper, zinc and nickel were in agreement with the literature value.
出处
《四川大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第1期246-252,共7页
Journal of Sichuan University(Natural Science Edition)
基金
国家高技术研究发展计划(863)项目(2006AA062361)
