摘要
建立测定铁质叶酸片中铁含量的方法。用1∶1的盐酸溶液和10%的盐酸羟胺处理样品,使样品中的铁全部转化成Fe2+,Fe2+与0.15%的邻菲罗啉显色剂络合生成稳定的橙红色化合物,按分光光度法,在511nm处测定吸光度。结果表明,铁离子浓度在0.022 4～0.112 0mg/mL范围内呈现良好线性。平均回收率为99.2%。RSD为1%(n=6)。该方法操作简单,样品前处理简便,结果稳定、精确,适用范围广,可用于铁质叶酸片中铁元素含量的测定。
A method for the determination of iron content in health food tablets by ultraviolet spectrophotometry was established. Use 50- of the hydrochloric acid solution and 10G of hydroxylamine hydrochloride processing samples to make all the iron in samples change into Fe^2＋. Fe^2＋ can react with 0.15% of the phenanthroline solution to form a stable orange red compound. Then all the iron can be deteminated by spectrophotometrie method on 511 nm. Results： Fe^2＋ was good linear over the range 0. 022 4-0. 112 0 mg/mL, the average recovery of Fe^2＋ was 99. 2%,and RSD was 1% （n = 6）. This method is simple, stable, precise and accurate. So this study can be used in determination of iron content, in iron folic acid tablets.
出处
《食品与机械》
CSCD
北大核心
2013年第1期99-101,共3页
Food and Machinery
关键词
分光光度法
铁
含量测定
片剂
spectrophotometric method
iron
determination
tablets
