1、3、5-三硝基苯、分光光度法测定空气中二氧化硫

Determination of Sulfur Dioxide by 1,3,5-Trinitrobenzene Spectrophotometric Method

根据1、3、5-三硝基苯中三个硝基具有吸电诱导效应和共轭效应原理，空气中的二氧化硫被水吸收形成亚硫酸根，发生电子跃迁，电荷转移，形成颜色，根据颜色深浅，快速测定二氧化硫，为进一步定量分析提供了优良的途径。

According to the principle that the three nitro groups of 1.3.5-trinitrobenzene have induction effect and conju-gative effect, the sulfur dioxide of the air can be absorbed, and from sulfite, then electronic transition and charge transfer happen, and.it forms color, on the grounds of the shade of the color, determine the sulfur dioxide quickly, this provides good ways for luther quantitative analysis.