阳离子表面活性剂缔合微粒荧光光谱法测定水中溶解氧  

Determination of dissolved oxygen in water through fluorescence spectrometry with associated particles for cationic surfactant

作　　者：张驰[1] 马婵 卢奕彤 ZHANG Chi;MA Chan;LU Yi-tong(School of Water and Environment,Chang’an University,Xi’an 710064,China;College of Geomatics,Xi’an University of Science and Technology,Xi’an 710054,China)

机构地区：[1]长安大学水利与环境学院,陕西西安710064 [2]西安科技大学测绘学院,陕西西安710054

出　　处：《应用化工》2020年第6期1572-1575,1582,共5页Applied Chemical Industry

基　　金：国家自然科学基金项目(20877036);陕西省自然科学基金项目(2006Z06)。

摘　　要：用I3^-和罗丹明6G(Rh6G)在硫酸锰硫-酸盐介质中反应,形成离子缔合物,采用荧光分光光度法测定水中溶解氧(DO)。研究了反应条件(KI浓度、反应时间、硫酸锰浓度、硫酸浓度、Rh6G浓度)对反应灵敏度、准确度、光谱强度的影响。结果表明,随着KIO3浓度的增加,I3^-的浓度随之增加,Rh6G-I3缔合微粒的结合度相应增加,KIO3浓度与Rh6G-I3缔合粒子的荧光强度的线性关系非常清晰。采用浓度为0.375 mmol/L KI、7.5 mmol/L MnSO4、5.0 mmol/L H2SO4、10μmol/L Rh6G,在室温下反应30 min,KIO3的浓度在0.1169~3.51μmol/L范围内ΔI呈现良好的线性关系,回归方程ΔI=12.699C-4.7869,相关系数R^2=0.9945。I^-3 and Rhodamine 6G(Rh6G)were used to react in the medium of manganese sulphate-sulphate to form ionic association.Adopting fluorescence spectrophotometry measured dissolved oxygen(DO)in water;researching the effects of reaction conditions(KI concentration,reaction time,manganese sulfate concentration,sulfuric acid concentration,Rh6G concentration)on the reaction system(sensitivity,accuracy,spectral intensity).The results showed that the concentration of I3^-increased with the increase of KIO3 concentration,and the binding degree of Rh6g-I3 association particles increased accordingly.The linear relationship between KIO3 concentration and the fluorescence intensity of Rh6g-I3 association particles was very clear.Finally adopted a linear relation with the regression equationΔI=12.699 C-4.7869 and correlation coefficient R^2=0.9945,which presented well when the concentration of 0.375 mmol/L KI,7.5 mmol/L MnSO4,5.0 mmol/L H2SO4,10 living mol/L Rh6G and the concentration of KIO3 reacted in the range of 0.1169~3.51μmol/L for 30 min at room temperature.

关 键 词：溶解氧 碘量法 罗丹明6G 

分 类 号：TQ610[化学工程—精细化工]