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本文研究了镍(Ⅱ)与3.5—Cl_2—PAAP 的显色反应。实验结果表明:在pH=6,有乙醇存在下,镍(Ⅱ)与3.5—Cl_2—PAAP 反应形成1∶3的红色络合物,摩尔吸光系数为7.5×10~4。方法用于矿样、水样中的镍测定,取得了令人满意的结果。
In this paper, the color reaction of nickel (Ⅱ) with 3.5-Cl_2-PAAP was studied. The results showed that nickel (Ⅱ) reacted with 3.5-Cl_2-PAAP in the presence of ethanol at pH = 6 to form a red complex with a molar absorptivity of 7.5 × 10-4. The method has been applied to the determination of nickel in mineral samples and water samples with satisfactory results.