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在强酸性介质中,水杨基萤光酮与溴化十六烷基三甲基铵能与某些高价金属离子(如钛、钼、钨、锡、锗等)生成稳定的胶束三元络合物。因此,为上述元素提供了分光光度测定的新途径。本文主要研究了以水杨基萤光酮-溴化十六烷基三甲基铵-钨的三元络合体系分光光度测定微量钨的各项条件,并研究了络合物的组成。试验结果表明,本法的灵敏度、选择性以及稳定性均较文献上所记载的其它方法有较大的特点,适合于金属合金材料中钨的快速测定。
In strongly acidic media, salicylfluorone and cetyltrimethylammonium bromide can form stable micellar ternary complexes with certain high-valent metal ions (such as titanium, molybdenum, tungsten, tin, germanium, etc.) Things. Therefore, a new approach to spectrophotometry is provided for the above elements. In this paper, the conditions of spectrophotometric determination of trace tungsten with ternary complex of salicylfluorone-cetyltrimethylammonium bromide and tungsten were studied. The composition of the complex was also studied. The test results show that the sensitivity, selectivity and stability of this method are larger than the other methods described in the literature and are suitable for the rapid determination of tungsten in metal alloy materials.