P tolualdehyde production by indirect electrosynthesis is characterized by high yield of product and no discharge of waste liquid due to recycle of electrolytic media realizing save of resources and protecting environment .

采用间接电合成 法生产对 甲基 苯 甲醛， 不仅产品的产率高，而且由于实现了电解媒质的循环使用， 使 整个 过程无废液排放， 既节省了资源，又保护了环境。

By comparing the two analytical methods it was found that RP-HPLC method had a wide linear range and a high recovery furthermore it was applicable to content determination of tolualdehyde and maleic acid .

通过对两种分析方法进行比较，发现反相高效液相色谱法 不仅线性范围宽，回收率高，而且还能 用于 甲基 苯 甲醛和马来酸含量的测定。

The models of simultaneous determination of xylene and tolualdehyde were established by optimizing the model parameters of partial least-squares method and at the same time the predictive scope were determined .

通过优化偏最小二乘法模型的参数，分别建立了同时测定二甲苯和 甲基 苯 甲醛 三 种 同 分 异构 体的模型，确定了预测范围。