双波长K系数法同时测定重油中的钴镍

Simultaneous Determination of Cobalt,Nickel in Heavy Oil by Double Wavelength K Coefficient Spectrophotometry

采用Ｍ２＋－ＯＰ－５－Ｂｒ－ＰＡＤＡＰ显色体系，测定波长对为５６０．０／５８７．０ｎｍ。考查了正三辛胺萃取分离干扰离子的条件，用双波长Ｋ系数法同时测定了合成样及重油样中的钴镍，合成样的回收率为９４．６％—１０５．４％。

M(Ⅱ) OP 5 Br PADAP coloured system and a wavelength pair of 560.0/587.0 nm are used for determining cobalt and nickel.The conditions for the extractive separation of interfering ions are investigated.Double wavelength K coefficient method is applied to determining cobalt and nickel in synthetic samples and heavy oil samples.The recovery rate for the synthetic samples is 94 6% 105 4% and the results for the heavy oil samples agree with that of the standard addition method.