【摘要】 用主成分回归法,自编程序在计算机上处理数据,同时测定油品中铁、钴、镍、钒。以OP-5-Br-PADAP为显色体系,用调节pH值的方法消除油品中共存元素的干扰。人工合成样品的回收率在94.3％～105.0％间,油样测定结果的相对标准偏差在2.0％～4.5％间。铁、钴、镍、钒的摩尔吸光系数分别为1.1×10~5,1.0×10~5,1.0×10~5,3.6×10~4。该法快速、准确、灵敏度高。更多还原

【Abstract】 It is reported in this paper that by the use of the principal component regression analysis, mi croamounts of the harmful metal elements e.g. iron, cobalt, nickel and vanadium can be simultaneously determined by photometric method with 5-Br-PADAP as color reagent in the presence of OP. Under the optimum conditions established values of molar absorptivity for the above mentioned elements are found to be 1.1×10~5 for iron ,1. O×10~5 for cobalt, 1.0×10~5 for nickel and 3. 6×10~5 for vanadium. The recoveries tested were found to be in the range 94.3%~105. 0%. The RSD found in the analysis of several petroleum product samples were in the range2.0% ~4.5%. After the color reactions are completed the absorbances are taken between the wavelengths 546630nm at an interval of 8nm using 1cm cell. The data obtained are input into treated by a microcomputer. The method proposed proved to be sensitive accurate and rapid.更多还原