一种快速测定食醋微量铁的分光光度法  

Determination of TraceIron in the Vinegar by Spectrop Hotometry

作　　者：李玉红[1] 田晓阳 吉言言 焦子珊 赵维[1] LI Yuhong;TIAN Xiaoyang;JI Yanyan;JIAO Zishan;ZHAO Wei(School of Chemistry and Chemical Engineering,Xianyang Normal University,Xianyang 712000,Shaanxi,China)

机构地区：[1]咸阳师范学院化学与化工学院,陕西咸阳712000

出　　处：《咸阳师范学院学报》2025年第2期32-35,共4页Journal of Xianyang Normal University

基　　金：陕西省科技厅重点研发项目(2024GX-YBXM-396);咸阳市科技局重点研发项目(2021ZDYF-GY-0039);国家级大学生创新创业训练计划项目(202310722016)。

摘　　要：建立测定食醋中微量铁含量的方法。用抗坏血酸使样品中的Fe(Ⅲ)全部转化成Fe(Ⅱ),Fe(Ⅱ)-邻菲罗啉显色剂络合生成的络合物最大吸光度波长为λ=510.0 nm。结果表明,线性回归方程为A=2.2786c+0.0093,线性相关系数R^(2)=0.9993,线性范围浓度在0~33.6μg/mL呈现良好。该方法用于市售食醋中铁含量的测定,测定值平均回收率为95.4%~100.7%,RSD为3.00%~4.89%(n=6)。该方法操作简单,专属性强,结果准确可靠,样品处理简便,可用于食醋中铁元素含量的测定。A method was established for the determination of trace iron content in vinegar.Ascorbic acid was used to convert all the Fe( Ⅲ) into Fe( Ⅱ)in the sample,and the maximum absorbance wavelength of the complex generated by Fe(Ⅱ)-o-pHenanthroline chromogen complexation was λ =510.0 nm.The results show that the linear regression equation is A=2.2786c+0.0093,the linear correlation coefficient R~2=0.9993,and the linear range concentration is presented in the range of 0~33.6 μg/mL good.The method was used for the determination of iron content in commercially available vinegar,and the average recoveries of the determined values were 95.4%~100.7% with the RSDs of 3.00%~4.89%(n=6).The method is simple,exclusive,accurate and reliable,and the sample pretreatment is simple,which can be used for the determination of iron in vinegar.

关 键 词：分光光度法 邻菲罗啉 铁 食醋 

分 类 号：O652.1[理学—分析化学]