【摘要】 在碱性(pH10.10)条件下,铕(Ⅲ)与结晶紫形成缔合物,表观摩尔系数为=1.8×105L/(mol.cm),铕的浓度在0.15~1.2mg/l范围内遵守比耳定律,组成摩尔比为Eu∶CV=1∶2.更多还原

【Abstract】 A high sensitive spectrophotometric method was develop for the determination of Europium.Europium reacts with crystal violet in the presence of NH₃（pH 10.10±0.05） to form a violet complex.The ion association complex exhibits maximum absorption at 590 nm with an apparent molar absorpbtivity of 1.8×10⁵ L/（mol·cm）.Beer’law is obeyed in the range of 0.15¹.2 mg/L for Eu³⁺.The molar ratio of the components of Eu∶CV is 1∶2.The composition of association complex has been discussed.The proposed method has been used for the determination of Eu³⁺ in imitative samples with satisfactory results.更多还原