Fe(Ⅲ)配合物法快速测定表面处理槽液中的苹果酸含量  

Determination of Malic Acid in Surface Treatment Bath Using Fe(Ⅲ) Complexation Method

作　　者：宋家沅 王慎行 唐俊榕 王亚齐 师明赫 赵美萍[1] SONG Jia-yuan;WANG Shen-xing;TANG Jun-rong;WANG Ya-qi;SHI Ming-he;ZHAO Mei-ping(College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China;Shanghai Aircraft Manufacturing Co.,Ltd.,Shanghai 201324,China)

机构地区：[1]北京大学化学与分子工程学院,北京100871 [2]上海飞机制造有限公司,上海201324

出　　处：《化学试剂》2024年第8期78-83,共6页Chemical Reagents

摘　　要：建立了一种表面处理槽液中苹果酸的快速测定方法,以甲酸作为辅助配体,并控制溶液pH 2.5~2.7,使苹果酸与Fe(Ⅲ)形成稳定的配合物,在波长372 nm处具有特征的紫外吸收峰。配合物的吸光度与苹果酸的浓度呈良好的线性关系,方法的线性范围为0.05~0.30 g/L,最低检测限为0.01 g/L。与现有技术相比,该方法操作简便、反应时间短、即混即测、易于自动化、抗干扰能力较强、不受表面处理槽液中常见金属离子和阴离子的影响、定量结果准确可靠,可为确保工业生产线的质量控制提供高效的技术支撑。The paper presented a new method for the rapid determination of malic acid in surface treatment bath solutions.Formic acid was used as an auxiliary ligand,and the solution pH was controlled between 2.5 and 2.7 to facilitate the formation of a stable complex between malic acid and Fe(Ⅲ).The absorbance of this malic acid-Fe(Ⅲ)complex was measured at a wavelength of 372 nm,demonstrating a good linear relationship with the concentration of malic acid.The method offers a linear range of 0.05 to 0.3 g/L and a detection limit of 0.01 g/L.It is simple to operate and features a short reaction time,allowing for immediate measurement after mixing,which makes it easy to automate.Additionally,it exhibits strong anti-interference capabilities and is unaffected by common metal ions and anions in surface treatment bath solutions.The quantitative results are accurate and reliable,providing efficient technical support for quality control in industrial production lines.

关 键 词：苹果酸 表面处理槽液 紫外分光光度法 快速检测 

分 类 号：O657.32[理学—分析化学]