2.The relationship between the ratio of gamma-ray Rayleigh to Compton backscattering intensities (R/C) and the weight fraction of heavyelement in light matrixes were investigated.
3.The cultivated Anisodus tanguticus (Maxim.) Pascher of two year and three year in different growth phase was collected, and the content of heavy metal element as Pb, As, Hg, Cd was analysed by hydrogen generation-atomic absorption spectrometry.
5.a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum.
6.a heavy precious metallic element; gray-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits.
7.Results The calibration curve was linear in t he range of 0.0025～0.0125μg /mL for Cd(r=0.9997). The average recovery of the heavy me tal element of Cd was99.37%(n=5,RSD =2.73%).
9.a heavy gray-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelite.
10.a heavy ductile magnetic metallic element; is silver-white in pure form but readily rusts; used in construction and tools and armament; plays a role in the transport of oxygen by the blood.
