RAPID DETERMINATION OF POTASSIUM ION IN PROCESSES OF DISSOLUTION AND ION EXCHANGE REACTION

LU Xiaohua; JI Xiaoyan; CHEN Dongliang; LIU Chang; BAO Ningzhong; FENG Xin

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RAPID DETERMINATION OF POTASSIUM ION IN PROCESSES OF DISSOLUTION AND ION EXCHANGE REACTION

更新时间：2025-12-10

- RAPID DETERMINATION OF POTASSIUM ION IN PROCESSES OF DISSOLUTION AND ION EXCHANGE REACTION
- CIESC Journal Issue 3, (2002)
- 作者机构：
  
  南京化工大学化工学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 March 2002，
  
  Published：25 March 2002
- 稿件说明：
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LU Xiaohua, JI Xiaoyan, CHEN Dongliang, et al. RAPID DETERMINATION OF POTASSIUM ION IN PROCESSES OF DISSOLUTION AND ION EXCHANGE REACTION[J]. CIESC Journal, 2002, (3).
DOI：

LU Xiaohua, JI Xiaoyan, CHEN Dongliang, et al. RAPID DETERMINATION OF POTASSIUM ION IN PROCESSES OF DISSOLUTION AND ION EXCHANGE REACTION[J]. CIESC Journal, 2002, (3). DOI：

摘要

离子溶液中快速传递及反应动力学过程的跟踪研究在实验上较为困难

为此基于离子选择性电极建立溶液中离子活度即时采集系统

并结合活度系数模型准确计算离子浓度 .该方法测定速度快

最小间隔为 1s

且所得离子浓度最大偏差小于 2 % .用此方法测定了硫酸钾溶解过程以及钛酸钾离子交换反应过程中钾离子浓度的变化

获得传统方法难以测定的数分钟内相关动态过程受溶剂、pH值的影响结果 .该方法可推广应用于研究其他各种动态过程 (如溶解、结晶、沉淀、离子交换、吸附和扩散等过程 )

Abstract

In order to study the rapid process of transfer and reaction kinetics experimentally

an activity determination system was established on the basis of ion selective electrodes(ISEs)

and a thermodynamic model was used to calculate the activity coefficients of liquid components in data processing to obtain the accurate concentration of ions.The determination in the proposed system is very rapid

and the minimum time interval is only one second.Meanwhile

the determination results are precise and reliable

with maximum deviation less than 2%.The established system was used to study the dissolution process of potassium sulphate and ion exchange reaction of potassium titanate.The effects of solvent and pH were studied.A process may be completed within several minutes.For this rapid process the existing analysis method is unsuitable

while the established system can obtain a large number of data points and the measured results are accurate.The established system and method can also be used in other processes such as dissolution

crystallization

precipitation

ion exchange reaction

adsorption and diffusion for other systems.

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