The samples of snail and hyacinth were digested by HNO_3-HClO_4,Cu,Zn,Ni,Cr were detected by flame AAS,and Pb,Cd by furnace AAS.

• 用硝酸-高氯酸体系消解螺蛳和水葫芦样品,采用火焰原子吸收光谱法测定铜、锌、镍、铬,用石墨炉原子吸收光谱法测定铅、镉。