姬松茸中Cu，Zn，Ag，Cd和Hg累积特性的初步研究

A PRELIMINARY STUDY ON ACCUMULATION CHARACTERISTICS OF COPPER,ZINC,SILVER,CADMIUM AND MERCURY IN AGARICUS BLAZEI MURILL

对三种不同产地的姬松茸子实体,经过微波消解后,采用电感耦合等离子体发射光谱法(ICP- OES)、原子吸收光谱法(AAS)和原子荧光光谱法(AFS)测定了其中Ag,Al,As,Au,B,Ba,Bi,Ca,Cd,Cr,Co,Cu,Fe,Hg,K,La,Mg,Mn,Mo,Na,M,P,Pb,Rb,S,Sb,Se,Sn,Sr,Ti,V和Zn等32种元素的含量,并用高效液相色谱和电感耦合等离子质谱联用技术(HPLC-ICP-MS)分析了其中Hg元素的形态.另外,还探讨了Cu,Zn,Ag,Cd,Hg及一些相关元素在姬松茸子实体不同部位的分布特征.研究表明:与一些常见种类的大型真菌相比,姬松茸对Cu,Zn,Ag,Cd,Hg具有较强的累积能力,累积的Hg主要以Hg^(2+)形态存在,CH_3Hg^+占总Hg比例在15%以下.Cu,Zn,Ag,Cd和Hg在姬松茸子实体不同部位的分布特征为:从菌柄下部到上部、从菌盖中心到边缘元素含量逐渐增加;P有助于提高姬松茸对Cu,Zn,Ag,Cd,Hg的累积能力,而Ca似乎起拮抗作用.

After a microwave decomposition, the contents of Ag, Al, As, Au, B, Ba, Bi, Ca, Cd, Cr, Co, Cu, Fe, Hg, K, La, Mg, Mn, Mo, Na, Ni, P, Pb, Rb, S, Sb, Se, Sn, Sr, Ti, V and Zn in the fruiting bodies of Agaricus blazei Murrill produced in three different cultivation regions of southern China were determined by ICP-OES, AAS and AFS, and the mercury species were separated and determined by HPLC-ICP-MS. Moreover, the distribution patterns of ds elements and some related elements were surveyed in Agaricus blazei Murrill. Compared with other mushrooms, Agaricus blazei Murrill has a peculiar characteristic of accumulating Cu, Zn, Ag, Cd and Hg in its tissues. Only two mercury species were found in Agaricus blazei Murrill, a great majority of accumulated mercury is in the form of Hg^2＋ , and the ratios of CH3Hg^＋/Hgtotal in all samples are below 15.0%. From low stipe to high stipe, from centric pileus to outer pileus, the contents of Cu, Zn, Ag, Cd and Hg in Agaricus blazei Murrill become more and more high, P can facilitate ds element accumulation, but Ca seems to play an opposite role.