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应用旋转环盘电极(RRDE)等电化学方法研究了在不同pH条件下,在银/溴化银电极上,亚硫酸盐(SO_3~(2-))对菲尼酮-对苯二酚超加合体系(P-H_2Q体系)显影反应速率的影响。结果表明,显影液中的亚硫酸盐不仅起保护显影剂的作用,而且影响显影反应速率。在较低pH下亚硫酸盐起抑制显影的作用,而在较高的pH下,会促进显影反应。这种现象可以认为主要是由于亚硫酸盐存在时,不同pH条件下,对苯二酚的氧化还原性质不同而引起的。
The effects of sulfite (SO_3 ~ (2-)) on the adsorption of phenanthrene-hydroquinone over silver / silver bromide electrode under different pH conditions were investigated by electrochemical methods such as rotating ring disk electrode (RRDE) Addition system (P-H_2Q system) development reaction rate. The results show that the sulfite in the developer not only plays a role of protecting the developer but also affects the development reaction rate. Sulfite acts at a lower pH to inhibit development, while at higher pH, promotes the development reaction. This phenomenon can be attributed mainly to the different redox properties of hydroquinone at different pHs in the presence of sulfite.