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在表面活性剂存在下,水杨基荧光酮、对羟基苯基荧光酮、对-二甲氨基苯基荧光酮、邻硝基苯基荧光酮、间硝基苯基荧光酮光度法测定锆已有报道,ε为(1.4～1.7)×10~5。邻氯苯基荧光酮(O-CPF)由于邻位强吸电子基氯的影响,预计与锆的反应灵敏度更高,可在更强的酸性介质中反应,可能选择性较好。试验证明:在0.4M盐酸介质中,在溴化十六烷基三甲铵(CTMAB)存在下,Zr与O-CPF生成橙红色络合物,λ_(max)=520nm,ε=1.7×10~5,Fe(Ⅲ)和Mo的干扰可用抗坏血酸、氯化羟铵掩蔽。
Spectrophotometric determination of zirconium with salicylfluorone, p-hydroxyphenylfluorone, p-dimethylaminophenylfluorone, o-nitrophenylfluorone and m-nitrophenylfluorone in the presence of a surfactant It has been reported that ε is (1.4 ~ 1.7) × 10 ~ 5. O-chlorophenylfluorone (O-CPF) is expected to react more with zirconium due to the strong electron withdrawing chlorine in the ortho-position and may react in more acidic media with better selectivity. The experiment proves that Zr and O-CPF can form orange-red complexes in the presence of cetyltrimethylammonium bromide (CTMAB) in the medium of 0.4M hydrochloric acid with λ max = 520nm and ε = 1.7 × 10 ~ 5, Fe (Ⅲ) and Mo interference available ascorbic acid, ammonium hydroxylamine masking.