原位漫反射中红外光谱在氢氧化钠杂质分析的应用  

Application of in situ diffuse reflectance mid infrared spectroscopy in the analysis of impurities in sodium hydroxide

作　　者：张美环 李雨情 宗鹤宸 王静伟 宗雪晴 于宏伟[1] Zhang Meihuan;Li Yuqing;Zong Hechen;Wang Jingwei;Zong Xueqing;Yu Hongwei(School of Chemical Engineering Shijiazhuang College)

机构地区：[1]石家庄学院

出　　处：《上海计量测试》2024年第1期28-32,36,共6页Shanghai Measurement and Testing

摘　　要：对原位漫反射中红外光谱开展了氢氧化钠杂质研究。实验发现:氢氧化钠杂质主要包括:少量碳酸钠和水。碳酸钠分子主要的红外吸收模式包括:C=O基团伸缩振动模式(νC=O-Na_(2)CO_(3))和CO_(3)基团面内弯曲振动模式(βCO_(3)-Na_(2)CO_(3))的合频峰(νC=O-Na_(2)CO_(3)+βCO_(3)-Na_(2)CO_(3));C=O基团伸缩振动模式(νC=O-Na_(2)CO_(3));CO_(3)基团不对称伸缩振动模式(νasCO_(3)-Na_(2)CO_(3));CO_(3)基团对称伸缩振动模式(νsCO_(3)-Na_(2)CO_(3));CO_(3)基团面外弯曲振动模式(rCO_(3)-Na_(2)CO_(3))及CO_(3)基团面内弯曲振动模式(βCO_(3)-Na_(2)CO_(3));水分子主要的红外吸收模式包括:OH基团伸缩振动模式(νOH-H_(2)O)。原位漫反射中红外光谱在氢氧化钠杂质分析领域,具有重要的应用研究价值。In situ diffuse reflectance mid infrared spectroscopy was used to study the impurity structure of sodium hydroxide.It is found that sodium hydroxide contains a small amount of sodium carbonate and water.The main infrared absorption modes of sodium carbonate molecules include:C=O groupstretching vibration mode(νC=O-Na_(2)CO_(3))and CO_(3)groupin-plane bending vibration mode(βCO_(3)-Na_(2)CO_(3))combined frequency peak(νC=O-Na_(2)CO+βCO_(3)-Na_(2)CO_(3)),C=O groupstretching vibration mode(νC=O-Na_(2)CO_(3)),CO_(3)groupasymmetric stretching vibration mode(νasCO_(3)-Na_(2)CO_(3)),CO_(3)groupsymmetric stretching vibration mode(νsCO_(3)-Na_(2)CO_(3)),CO_(3)group out of plane bending vibration mode(rCO_(3)-Na_(2)CO_(3))and CO_(3)group in plane bending vibration mode(βCO_(3)-Na_(2)CO_(3)).The main infrared absorption modes of water molecules include:OH groupstretching vibration mode(νOH-H_(2)O).In situ diffuse reflectance mid infrared spectroscopy has important application research value in the analysis of sodium hydroxide impurities.

关 键 词：原位漫反射中红外光谱 杂质 氢氧化钠 碳酸钠 水 

分 类 号：O657.33[理学—分析化学] TQ131.12[理学—化学]