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用正三辛胺萃取分离干扰离子,以Fe2+(Zn2+)-5_Br_PADAP(2-(5-溴-2-吡啶偶氮)-5-二乙基氨基苯酚)-TritonX_100为显色体系,建立了双波长K系数法同时测定重油中微量铁、锌的新方法。考查了测定条件及萃取分离条件。线性范围:铁0~480μg/L、锌0~400μg/L,合成样回收率(100±2)%,重油测定结果的相对标准偏差小于5%。方法简便、准确。
The interference ions were extracted and extracted with n-octylamine, and the dual-wavelength system was developed with the color system of Fe2 + (Zn2 +) - 5_Br_PADAP (2- (5-bromo-2-pyridylazo) -5-diethylaminophenol) -TritonX_100 Simultaneous Determination of Trace Iron and Zinc in Heavy Oil by K Coefficient Method. Examined the determination of conditions and extraction conditions. The linear range was 0-480 μg / L for iron and 0-400 μg / L for zinc. The recovery rate was 100 ± 2%. The relative standard deviation of heavy oil was less than 5%. The method is simple and accurate.