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萤光酮类试剂对于多价阳离子具有较高的反应灵敏度,在某些表面活性剂或辅助络合配位体存在下可形成灵敏度更高的多元络合物。锗(Ⅳ)和苯基萤光酮的显色反应报导较多,其摩耳吸光系数一般是1.2-1.4×10~5。沈含熙等最近发表的水杨基萤光酮——溴化十六烷基三甲铵一锗(Ⅳ)显色反应体系的灵敏度达1.89×10~5。
Fluorescent ketones have high sensitivity to multivalent cations and form more sensitive multi-complexes in the presence of certain surfactants or co-ligands. The color reaction of germanium (Ⅳ) with phenylfluorone is reported in many cases. The molar absorption coefficient of germanium is generally 1.2-1.4 × 10 ~ 5. Shen Han-Xi and other recently published salicyl fluorone - cetyl trimethyl ammonium bromide - germanium (Ⅳ) color reaction system sensitivity of 1.89 × 10 ~