云南省不同产地茯苓菌核中汞元素含量研究（英文）

Mercury in Sclerotia of Wolfiporia Extensa(Peck)Ginns Fungus Collected Across of the Yunnan Land

茯苓菌核在亚洲具有悠久的药用历史,也是北京传统小吃"茯苓夹饼"原材料。研究旨在测量和评价中国云南地区茯苓菌核的总汞含量。与其他种类蘑菇子实体相比,茯苓菌核汞含量较低。汞含量(干物质)的范围为0.004 1~0.019mg·kg^(-1),中位数为0.011mg·kg^(-1),总体平均值为(0.011±0.004)mg·kg^(-1),表明云南不同产地茯苓菌核中Hg含量受到复杂山地类型的影响较大。对每天食用含有50g茯苓菌核的茯苓夹饼Hg摄入量进行健康评估,人均每天Hg摄入量为0.000 003 4~0.000 016mg·kg^(-1),按成人体重60kg计算,人均每天Hg摄入量为0.000 009 2~0.000 55mg。研究结果显示,茯苓菌核中Hg元素含量较低,其摄入量低于健康限量标准。同时,煎煮后的茯苓菌核中Hg摄入量也低于健康限量标准,由茯苓菌核制成的茯苓夹饼Hg含量较低。

Dried sclerotia of Wolfiporia extensa has a long history of medicinal uses in Asia and also is a tradi-tional snack in Beij ing that is called“fuling j iabing”.This study aimed at providing and evaluating data on total Hg contents of sclerotia collected across of the Yunnan land in China,which is generally lacking information. Sclerotia of W.extensa showed a low contamination with Hg when compared to fruiting bodies of many mush-room species.The Hg contents ranged from 0.004 1 to 0.019 mg Hg per kg dry matter with a median value of 0.011 mg·kg-1 dry matter and an overall mean value of （0.011±0.004）mg·kg-1 dry matter.Mercury con-tent of sclerotia varied between the places of collection in mountainous Yunnan.Assessed intake of Hg by adult eating 50 g of the“average”Yunnan’s origin sclerotia contained in the“Fuling jiabing”snack could be between 0.000 009 2 and 0.000 55 mg per capita or between 0.000 003 4 and 0.000 016 mg per kg body mass for a typ-ical adult of mass 60 kg,which is a low intake and Hg intakes would even be much less if taking decoctions of sclerotia.This study has revealed that sclerotia of W.extensa showed a weak contamination with Hg and pos-sible Hg intake eating sclerotia ofW.extensa is below health limits.Also Hg intake from the decoctions ofW. extensa is much below health limits and “fuling jiabing”snack made of sclerotia of W.extensa provides little Hg.