In this paper, the importance and complexity of the selection and control of the solution acidity in coordination titration was discussed through the principle and the application.

本文从原理和应用两个方面，讨论了配位滴定中选择和控制溶液酸度的重要性和复杂性。

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With fresh pineapple juice as a sample, the automatic potentionmetric titration was established to analyze the total acidity in the fruit juices.

以鲜榨菠萝汁为样品，建立了测定果汁总酸的自动电位滴定法。

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The acidity control problem of de-masking reaction in complexometric titration was presented theoretically in the paper, and simple calculation method was also provided.

从理论上对配位滴定时解蔽反应的酸度问题进行了探讨，并提出了简便的计算方法。

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