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在 p H=6的乙酸盐缓冲溶液中 ,铝一铬天青 S与阳离子表面活性剂氯化十六烷基三甲胺 (CTAC)形成稳定异配位体三元络合物的显色反应 ,籍以进行三氧化二铝的光度测定。经试验 ,CTAC的引入 ,不但改善了铬天青 S光度法的显色条件 ,而且提高了测定的准确度和灵敏度。其测定结果与标准值相符 ,RSD<5% (n=6)
In p H = 6 acetate buffer solution, the chromogenic reaction of aluminum-chromium azurol S with the cationic surfactant cetyltrimethylammonium chloride (CTAC) forms a stable heteroleptic ternary complex , Membership to carry out photometric determination of aluminum oxide. After the test, the introduction of CTAC not only improves the chromogenic conditions of chromazurol S photometric method, but also improves the accuracy and sensitivity of the determination. The measured results consistent with the standard value, RSD <5% (n = 6)