磷酸对pH振荡的影响  

Effect of phosphoric acid on pH oscillation

作　　者：杨珊[1] 

机构地区：[1]渭南师范学院化学与生命科学学院,陕西渭南714099

出　　处：《应用化工》2015年第10期1840-1843,共4页Applied Chemical Industry

基　　金：陕西省自然科学基础研究计划资助项目(2013JQ2021);陕西省教育厅科研计划资助项目(2013JK0656);渭南师范学院科研计划项目(15YKF004);渭南师范学院特色学科建设项目(14TSXK04)

摘　　要：研究酸性外源物的加入对pH振荡行为的影响。以Br O3--SO32--Fe(CN)64-(简称BSF)体系为pH振荡模型,在连续流动搅拌条件下研究三元无机酸-磷酸的浓度改变对BSF体系pH振荡的周期和振幅的影响规律。结果表明,随着磷酸浓度的增加,BSF体系pH振荡的振幅线性减小,而周期则先减小后增大。磷酸对pH振荡的上述影响与其酸性、对pH的缓冲作用及原盐效应有关。The effect of the introduction of inorganic triacid-phosphoric acid on the oscillating behaviors of pH oscillation of BrO3^--SO3^2--Fe（ CN）6^4-（ BSF） system was studied in a continuous flow stirred setup.The regularity of pH amplitude and period as changing the concentration of phosphoric acid was studied.The results showed that the amplitude of pH oscillation decreased linearly with the increase of the concentration of phosphoric acid,while the period decreased and then increased. The above phenomena were associated with the acidity,pH buffering effect,and primary salt effect of phosphoric acid.

关 键 词：化学振荡 pH振荡 BSF体系 磷酸 

分 类 号：TQ031.7[化学工程] O657.1[理学—分析化学]