The Relation Between the Maximal Buffer Capacity of Buffer Solution and the Proportionality of Concentration of Buffer Ingredient

Huang Guoliang
(The Light Industry Technical School in Linyi,  Shandong,  Linyi  276005)

Abstract  According to the definition of Van Slyke, we can get out if the total concentration is certain, the buffer capacity is maximal when the proportionality of concentration of buffer ingredient equals 1/1. But the above conclusion is based on the variety of pH equals zero. If the variety of pH equals d, the buffer capacity is the maximal when [alkali]/[acid]= 1/10^d/2.
Key words   Buffer solution,  Buffer capacity,  Proportionality of concentration of buffer ingredient

缓冲溶液最大缓冲容量与缓冲组分浓度比的关系研究

黄国良
(山东省临沂市轻工技校  临沂  276005)

摘要  根据Van Slyke的定义可以得出，如果总浓度一定，当缓冲组分的浓度比为1/1时缓冲容量最大。但以上结论只有当pH的变化量等于零时才能成立，如果pH的变化量为d，则最大缓冲容量对应的[碱]/[酸]=1/10^d/2。
关键词  缓冲溶液  缓冲容量  缓冲组分浓度比

黄国良  男，34岁，讲师，从事分析化学和生物化学教学工作。
2003-02-24收稿，2004-02-23接受

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