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在含有40%乙醇的微酸性溶液中,Ca与CPAⅢ或ASAⅢ形成1:2的蓝色络合物,最大吸收位于650nm处,Ca—CPAⅢ络合物在pH2.25时的表观摩尔吸光系数为4.52
In a slightly acidic solution containing 40% ethanol, Ca forms a 1: 2 blue complex with CPA III or ASA III with a maximum absorption at 650 nm. The apparent molar absorptivity of Ca-CPA III complex at pH 2.25 Is 4.52