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利用UO_2~(2+)与苯甲酸生成配阴离子,再和碱性染料形成离子缔合物的萃取光度法测定铀已有报道,上述方法的摩尔吸收系数一般在7×10~4～1×10~5L·mol~(-1)·cm~(-1)。Ramakrishna等人用明胶增溶UO_2~(2+)-邻氨基苯甲酸-罗丹明6G所形成的离子缔合物,在水溶液中直接测定铀离子,但摩尔吸收系数仅为6.25×10~4·mol~(-1)·cm~(-1)。
Determination of uranium by extraction spectrophotometry with UO 2 2+ and benzoic acid to form anions followed by basic dyes to form ionomers has been reported. The molar absorption coefficient of the above method is generally in the range of 7 × 10 -4 -1 × 10 ~ 5L · mol ~ (-1) · cm ~ (-1). Ramakrishna et al. Used gelatin to solubilize ion complexes formed by UO 2 2- (2 +) - anthranilic acid-rhodamine 6G and directly determined uranium ions in aqueous solution, but the molar absorption coefficient was only 6.25 × 10 -4 mol ~ (-1) · cm ~ (-1).