作　　者： ; ; (李刚）;

机构地区： 四川轻化工学院化学工程系

出　　处： 《分析化学》 1995年第11期1284-1287,共4页

摘　　要： 7-(1-苯偶氮)-8-羟基喹啉-5-磺酸钠(PAHQS)在pH=4.75 HAc-NaAc缓冲溶液中能与 Cu(Ⅱ)和 Fe(Ⅲ)形成稳定的络合物,本文研究了 Cu(Ⅱ)-PAHQS、Fe(Ⅲ)-PAHQS体系的显色条件,以偏最小二乘法(PLS)处理两者重叠吸收峰,建立了光度法同时测定铜和铁的方法.经过模拟水样、环境样品中铜和铁的测定,结果准确、可靠.应用于茶汤和沱江水中痕量铜和铁的形态分析,取得了令人满意的结果. Copper (Ⅰ) and iron(Ⅲ) can react with 7-(l-phenylazo)-8-hydroxyquinoline-5-sulfonate (PAHQS) in HAc-NaAc buffer solution to form stable copmpexes, and the chro-mogenic system was studied. Absorption peaks of two complexes are seriously overlapping, patial least squares(PLS) method was used as mathematical pattern to analyse them. The results of the simultaneous determination of copper and iron in simulative samples and environmental samples were predicted spectrophotometrically by PLS method, and this method has been applied to the speciation analysis of trace copper and iron in tea soup and Tuo river with satisfactory results.

关 键 词： 偏最小二乘法 光度法 铜 铁 茶 水样

领　　域： [理学] [理学] [理学] [理学]