英语语法分析

The content of total vitamin C and reductive ascorbic acid were determined by 2,4-dinitrobenzene hydrazine.

总维生素C、还原型维生素C含量的测定采用2，4二-硝基苯肼法。

In HCl medium, trace o-dinitrobenzene can sensitively inhibit the discoloration reaction of neutral red oxidized by KIO4.

研究发现， 在盐酸介质中，痕量邻二硝基苯能灵敏地阻抑高碘酸钾氧化中性红褪色。

The dinitrobenzene with electron-withdrawing group can be hydrogenated much easier than the dinitrobenzene with electron-donating group.

含有吸电子基团的二硝基苯类化合物反应活性明显高于含有供电子基的二硝基化合物的加氢反应；