巯基乙酸钠分光光度法测量水中的铁含量  

Determination of Iron Content in Water by Sodium Thioglycolate Spectrophotometry

作　　者：徐洁鸿 吴丹虹 应琪 任旭滨 王羽 Xu Jie-hong;Wu Dan-hong;Ying Qi;Ren Xu-bin;Wang Yu

机构地区：[1]宁波市中普检测技术服务有限公司,浙江宁波315000

出　　处：《化工设计通讯》2022年第6期112-114,共3页Chemical Engineering Design Communications

摘　　要：重点研究了使用巯基乙酸钠作为显色剂,使用分光光度法测定水中铁的含量。在室温条件下氨水调节pH为9.4~10.8,同时采用酒石酸来屏蔽干扰元素,铁离子与巯基乙酸钠产生紫红色的络合物,在UV测试中530nm处有最大的吸光度。为此创建了铁离子浓度为(0.5~10.0)×10^(-6)的曲线,该曲线符合朗博比尔定律且有较好的线性。This paper focuses on the use of sodium thioglycolate as a color developer to determine the content of iron in water by spectrophotometry.At room temperature,ammonia water is adjusted to pH 9.4-10.8,and tartaric acid is used to shield interfering elements.Iron ion and sodium thioglycolate form a purple-red complex,which has the maximum absorbance at 530nm in UV test.For this purpose,we created a curve with iron ion concentration of 0.5-10.0ppm,which conforms to Rambo Beer's law and has good linearity.

关 键 词：巯基乙酸钠 铁离子 分光光度法 

分 类 号：O657[理学—分析化学]