The several important affecting factors of photocatalytic degradation, including initial ph value of solution, catalyst quantity and initial concentration of solution, were also discussed.

讨论了影响光催化降解效果的溶液初始酸度、催化剂投加量和甲基橙的初始浓度等几个重要因素。

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Slow granule: can make solution PH value in a certain range of constant maintain the basic material.

缓冲剂：能够使溶液PH值在一定范围内维持基本恒定的物质。

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Various factors have a large effect on the results, such as pH value of the solution of the samples, the mass of the samples and the temperature.

研究发现试样溶解是成败的关键，试样溶解时的酸度、所用试样的质量以及所用温度对分析结果有较大的影响。

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