多波长线性回归-分光光度法同时测定油品中的铁和钒

Simultaneous Determination of Iron and Vanadium in Catalytic Cracking Feedstock by MultiWavelength Linear Regression Spectrophotometry

用鞣酸为显示剂，采用多波长线性回归－分光光度法同时测定催化裂化原料油中的铁和钒，方法简单，选择性好，不需要任何掩蔽和分离，可直接进行测定。对合成样品进行分析，铁的相对标准偏差≤２．４４％，相对误差≤２．６０％；钒的相对标准偏差≤４．６５％，相对误差≤±１．３２％。对实际样品进行分析并与其它方法进行对照试验，结果良好。

he spectrophotometric method based on multiwavelength linear regression is described for the simultaneous determination of Fe3+ and V5+ in the oil with tannic acid resorcinol.The method has the advantage of simplicity because no cover and separation are needed.The synthetic sample were determined by the method,the relative standard deviation of Fe3+ and V5+ were respectivly less than 2.44% and 4.65%,and the relative error being respectivly less than 2.60% and 132%.The iron and vanadium in the oil were determined by the method and compared with other method,the results were satisfactory.