摘要
本研究应用封闭式增强循环吸收法作为前处理技术,建立了海水中硫化物的快速检测方法。与传统亚甲基蓝分光光度法相比,该方法采用封闭循环系统和自动加酸技术,有效避免了实验过程中H2S的泄漏,显著提升了方法准确度,回收率超过80%,检出限达0.16μg/L;应用增强循环技术,免去了氮吹和样品加热等步骤,将样品处理时间缩短至5 min,大大提高了检测效率,有利于批量处理样品,为海水中硫化物的测定提供了一种快速、准确、高效的方法。
In this study,a rapid method for the determination of sulfides in seawater was developed using enhanced circulating absorption method in the closed system.Compared with the traditional methylene blue spectrophotometric method,the new method uses the enhanced circulating absorption in the closed system with automatic quantitative acid adding technique and without nitrogen blow and heating.The sample treatment time is less than 5 min,which is convenient and efficient for batch treatment of seawater samples.The closed system avoids the leakage of H2S,and ensures the recovery rate(more than 80%)and precision.The method detection limit is 0.16μg/L.The new method is rapid,accurate and efficient for sulfide monitoring in seawater,and can completely meet the demand of the marine environmental monitoring.
作者
张爽
崔福旭
李明浩
刘通
陈士恒
王震
ZHANG Shuang;CUI Fu-xu;LI Ming-hao;LIU Tong;CHEN Shi-heng;WANG Zhen(State Environmental Protection Key Laboratory of Coastal Ecosystem,National Marine Environmental Monitoring Center,Dalian 116023,China;Beijing Pioneer Weifeng Technology Development Company,Beijing 100191,China;Beijing Research Institute of Chemical Engineering Metallurgy,Beijing 101149,China)
出处
《海洋环境科学》
CAS
CSCD
北大核心
2022年第6期957-961,共5页
Marine Environmental Science
关键词
亚甲基蓝分光光度法
增强循环吸收
硫化物
海水
硫化氢
methylene blue spectrophotometric method
enhanced circulating absorption
sulfides
seawater
sulfuretted hydrogen
