从数学上对三元配合物用于光度分析时适宜酸度范围问题进行了探讨，并给出了简便的计算公式。
The optimum acidity range of spectrometric determination with ternary coordination compound was studied mathematically in this paper, and simple calculation method was also provided.
陕西地区：苹果的品种以秦冠为主，浓缩苹果清汁的酸度为低酸，酸度范围1.0% - 1.8%。
Shaanxi area: the main variety of apple is Qinguan, low acidity, the range of acidity is 1.0%-1.8%.
从数学上对三元配合物用于光度分析时适宜酸度范围问题的第二种情形进行了探讨，并给出了简便的计算公式。
The second optimum acidity range of spectrometric determination with ternary coordination compound was studied mathematically in this paper, a simple calculation method was also provided.
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