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该文详细分析了壬基酚变色的原因,并提出了有效防止比色指数上升的措施,应用效果显著.该文同时提出了新的问题.“,”Detailed analysis of the reasovs, which cause the nonylpbenol colour change is given in this paper. Effec- tive methods to prevent the colour index of nonylphenol from increasing are also given. These methods are proved to be effective.At the same time,some new problems are poined out,which we are solve in the fure.