有机弱酸盐对pH振荡反应的影响  

Effect of organic weak acid salts on pH oscillation

作　　者：侯玉龙[1] 杨珊[1,2] 胡道道[1] 

机构地区：[1]陕西师范大学材料科学与工程学院,陕西西安710119 [2]渭南师范学院化学与生命科学学院,陕西渭南714099

出　　处：《陕西师范大学学报（自然科学版）》2014年第6期45-49,共5页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：陕西省自然科学基础研究计划项目(2013JQ2021)

摘　　要：采用连续流动进样装置研究了苯甲酸钠、山梨酸钾及柠檬酸对BrO3--SO2-3-Fe(CN)4-6-H+(简称BSF)体系pH振荡行为的影响.结果表明:这些弱酸盐均具有对体系pH振幅降低的作用,且盐浓度与振幅呈线性关系;当弱酸盐达到一定浓度时,振荡消失.弱酸盐对pH振荡周期具有一定的缩短作用.弱酸盐对pH振荡行为的上述影响与其对体系pH缓冲作用及原盐效应有关.The effects of sodium benzoate,potassium sorbate,and citric acid on pH oscillation of BrO3 --SO2-3 -Fe（CN）4-6 -H＋ （BSF）system were studied using a continuous flow stirred setup. The amplitude of the pH oscillation could be depressed by organic weak acid salts,and there were linear relationship between the amplitude and concentration of these salts.The oscillation could be depressed thoroughly as the concentration of salts is beyond certain concentration.Additional-ly,the period of the pH oscillation could be shortened by these salts.The phenomena above men-tioned could be explained in terms of the buffering effect and primary salt effect.The present re-search is significant for studying the effects of weak acid salts on the pH oscillation.

关 键 词：PH 振荡 有机弱酸盐 苯甲酸钠 山梨酸钾 柠檬酸 

分 类 号：O657.1[理学—分析化学]