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日本分析工作者提出:在十六烷基溴化吡啶和吡啶的存在下,Ga(Ⅲ)与苯基荧光酮反应生成水溶性的螯合物,最大吸收在570nm,在pH4.0—5.5时,吸光度可稳定几个小时,直到4.3×10~(-6)M的镓浓度遵守比尔定律。灵敏度很高、摩尔吸光系数达1.48×10~5。可用于测定μg级的镓。镓与苯基荧光酮的络合比为1:2。实验方法:2ml缓冲溶液(用1M醋酸钠与1M盐酸混合配成),2.5ml 2×10~(-2)M十六烷基溴化吡啶、2.5ml2.48M吡啶、
Japanese analysts propose that Ga (III) reacts with phenylfluorone in the presence of cetylpyridinium bromide and pyridine to form a water-soluble chelate with a maximum absorption at 570 nm and at pH 4.0-5.5 , The absorbance can be stable for several hours until the gallium concentration of 4.3 × 10 -6 M obeys Bill’s law. High sensitivity, molar absorption coefficient of 1.48 × 10 ~ 5. Can be used to determine g-grade gallium. The complex ratio of gallium to phenylfluorone is 1: 2. Experimental Methods: 2 ml of buffer solution (mixed with 1 M sodium acetate and 1 M hydrochloric acid), 2.5 ml of 2 x 10 ~ (-2) M cetylpyridinium bromide, 2.5 ml of 2.48 M pyridine,