摘要
本文研究了海产品中微量铬的催化极谱测定方法，在乙二胺——亚硝酸钠底液体系中，可得到灵敏，清晰和稳定的极谱吸附催化波，其导数示波极谱上的峰电位为一1．75V(Vs．S．C．E．)，检出下限达ug／L级，文中还探讨了几种不同的消化方式对测定结果的影响，结果表明，选择HNO3-HF-HClO4混合体系消解最为完全。
Ins thi paper, the polargraphic catalytic wave of microamount chromium in seafood is studied. In abbottem solution of ethyl diamine and sodium nitrite, a clear, sensitive and stable catalytic adsorption wave is obtained, and its peak potential in differential oscilloscopic polarogram is-1.75V(Vs. S. C. E. ) . Its detection limit amounts to 0.1μg/l. It is applied to the determination of microamount chromiumin various seafood. All relative errors of recoveries are not more than 8%, their variant coeffients are less than 5%. This paper also inquires into the different digestive methods which influence the results of determination. The conclusion shows that it is the best method to select the digestive system of nitric acid-hydrofluoric acid-perchloric acid.
