Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1, Omiya, Asahi, Osaka, 535-8585, Japan.
Kimoto Electric Co. Ltd., 3-1 Funahashi, Ten-Noji, Osaka, 543-0024, Japan.
Anal Sci. 2023 Jul;39(7):1143-1149. doi: 10.1007/s44211-023-00323-7. Epub 2023 Mar 23.
A new chemiluminescence (CL) method based on the chemiluminescent reaction between sulfide and an acidic permanganate solution was used to quantify sulfide in seawater. A terbium-pipemidic acid complex was used as CL enhancer. The method was used to determine sulfide in the concentration range of 1-30 μmol/L in artificial seawater samples. The limit of detection of the method was 21 nmol/L sulfide. The sensitivity of the CL method was eight times higher than that of the CL method reported previously. Br ions, which are conservative ions, interfered with sulfide. We investigated the effects of salinity, water temperature, and interfering chemicals,such asheavy-metal ions and organic matter, on the performance of the CL method. In addition, sulfite-spiked natural seawater samples were analyzed. The results demonstrate that the CL method can be used to develop a deep-sea sulfide analyzer.
一种基于硫化物与酸性高锰酸盐溶液之间的化学发光反应的新化学发光 (CL) 方法被用于定量海水中的硫化物。使用三价铽-哌啶酸配合物作为 CL 增强剂。该方法用于测定人工海水中浓度范围为 1-30 μmol/L 的硫化物。该方法的检出限为 21 nmol/L 硫化物。CL 方法的灵敏度比以前报道的 CL 方法高 8 倍。溴离子是保守离子，会干扰硫化物的测定。我们研究了盐度、水温以及重金属离子和有机物等干扰化学物质对 CL 方法性能的影响。此外，还分析了亚硫酸盐加标天然海水样品。结果表明，CL 方法可用于开发深海硫化物分析仪。
