光电比浊法在线测定表面处理槽液中硫酸含量  

A Photoelectric Turbidimetric Method for Online Determination of Sulfuric Acid in Surface Treatment Bath

作　　者：马艳子[1,2] 王岩[1,2] 唐俊榕[3] 麦嘉琪 聂洪港 赵美萍[2] MA Yan-zi;WANG Yan;TANG Jun-rong;MAI Jia-qi;NIE Hong-gang;ZHAO Mei-ping(National Demonstration Center for Experimental Chemistry Education,Peking University,Beijing 100871,China;College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China;Shanghai Aircraft Manufacturing Co.,Ltd.,Shanghai 201324,China)

机构地区：[1]北京大学化学国家级实验教学示范中心,北京100871 [2]北京大学化学与分子工程学院,北京100871 [3]上海飞机制造有限公司,上海201324

出　　处：《化学试剂》2025年第2期85-93,共9页Chemical Reagents

摘　　要：开发了一种新型光电比浊法,用于在线快速准确测定表面处理槽液中的硫酸含量。该方法通过特定分散剂结合原位光谱测量技术,实现了对悬浊液体系吸收光谱的连续监测。利用含EDTA的醋酸-醋酸钠缓冲溶液,有效消除了Ce(Ⅲ)等金属离子可能的干扰。方法线性范围为0.04~0.11 g/L,检测限为0.004 g/L。与传统的重量法相比,对实际样品时检测的相对误差<2.5%。方法无需样品预处理,使用在线进样装置直接对样品进行取样检测,测定总时长不超过20 min,可广泛用于生产现场表面处理槽液中硫酸含量的在线快速分析。A novel photoelectric turbidimetric method for the rapid and accurate online determination of sulfuric acid content in surface treatment bath solutions was developed.The method utilized a specific dispersing agent combined with in-situ spectral measurement technology to monitor the absorption spectrum of the suspension system continuously.By using an acetate-sodium acetate buffer solution containing EDTA,the potential interference of metal ions such as Ce(Ⅲ)was effectively eliminated.The method had a linear range of 0.04 to 0.11 g/L,with a detection limit as low as 0.004 g/L.Compared to the traditional gravimetric method,the relative error of this method in detecting actual samples was less than 2.5%.The method did not require sample pretreatment,and the total analysis time was no more than 20 minutes by using an online sampling device for direct sample testing.It can be widely used for the online rapid analysis of sulfuric acid content in surface treatment bath solutions on production sites.

关 键 词：硫酸 表面处理槽液 硫酸钡光电比浊法 光纤光谱 原位快速检测 

分 类 号：O65[理学—分析化学]