碱性物质对BrO_3^--SO_3^(2-)-Fe(CN)_6^(4-)体系pH振荡反应的影响  

Effects of alkaline chemicals on pH oscillation in the solution of BrO_3^--SO_3^(2-)-Fe(CN)_6^(4-)

作　　者：杨珊[1,2] 侯玉龙[2] 

机构地区：[1]渭南师范学院化学与环境学院军民两用材料重点实验室,陕西渭南714099 [2]陕西师范大学材料科学与工程学院,陕西西安710119

出　　处：《陕西师范大学学报（自然科学版）》2016年第2期66-70,84,共6页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：陕西省自然科学基金(2013JQ2021);渭南师范学院科研计划(15YKF004);陕西省军民融合研究基金(16JMR08)

摘　　要：在连续流动进样条件下,研究了三聚氰胺、氨水及氢氧化钠的引入对BrO-3-SO2-3-Fe(CN)4-6(简称BSF)体系pH振荡的振幅和周期等行为的影响。结果表明:pH振荡的振幅和周期皆随三聚氰胺浓度的增大而线性减小,这与三聚氰胺的碱性、对pH的缓冲作用及原盐效应有关;随着氨水或氢氧化钠浓度的增加,pH振荡的振幅基本不变,周期线性增大,这主要为氨水或氢氧化钠碱性的影响。The effects of three kinds of alkaline chemicals,i.e., melamine,ammonium hydroxide,and sodium hydroxide,on the pH oscillation of BrO-3-SO2-3-Fe（CN）4-6（BSF）system were studied using a continuous flow stirred setup.The alkalinity,buffering effect and primary salt effect of melamine resulted in a linear decrease of amplitude and period of pH oscillation;however,the pH amplitude kept unchanged and the period linearly increased with the increase of ammonium hydroxide or sodium hydroxide mainly on account for its alkalinity.This research is significant for establishing the method for adjusting the pH oscillation behaviors through introducing foreign materials.

关 键 词：pH振荡 碱性物质 三聚氰胺 氨水 氢氧化钠 

分 类 号：O657.1[理学—分析化学]