建立了气相色谱法测定高纯四氟化锗中痕量气体杂质的方法,设计气路切割过程并研制高密封性吹扫进样系统。采用GOW MAC 816气相色谱,载气为氦气,采用脉冲放电氦离子化检测器(PDHID)。结果表明:各项杂质分离效果良好,平行实验相对标准偏...建立了气相色谱法测定高纯四氟化锗中痕量气体杂质的方法,设计气路切割过程并研制高密封性吹扫进样系统。采用GOW MAC 816气相色谱,载气为氦气,采用脉冲放电氦离子化检测器(PDHID)。结果表明:各项杂质分离效果良好,平行实验相对标准偏差均在5%以下。该方法准确可靠,可用于高纯四氟化锗中痕量气体杂质的测定。展开更多
Earthquake-related hydrochemical changes in thermal springs have been widely observed;however,quantitative modeling of the reactive transport process is absent.In the present study,we apply reactive transport simulati...Earthquake-related hydrochemical changes in thermal springs have been widely observed;however,quantitative modeling of the reactive transport process is absent.In the present study,we apply reactive transport simulation to capture the hydrochemical responses in a thermal spring following the Wenchuan Ms 8.0 and Lushan Ms 7.0 earthquakes.We first constrain deep reservoir geothermal fluid compositions and temperature by multicomponent geothermometry,and then a reactive geochemical transport model is constructed to reproduce the hydrochemical evolution process.The results show that the recharge from the shallow aquifer increases gradually until it reaches a peak because of the permeability enhancement caused by the Lushan earthquake,which may be the mechanism to explain the earthquake-related hydrochemical responses.In contrast to the postseismic effect of the Wenchuan earthquake,the chemical evolution can be considered as hydrochemical anomalies related to the Lushan earthquake.This study proves that the efficient simulation of reactive transport processes is useful for investigating earthquake-related signals in hydrochemical time series.展开更多
文摘建立了气相色谱法测定高纯四氟化锗中痕量气体杂质的方法,设计气路切割过程并研制高密封性吹扫进样系统。采用GOW MAC 816气相色谱,载气为氦气,采用脉冲放电氦离子化检测器(PDHID)。结果表明:各项杂质分离效果良好,平行实验相对标准偏差均在5%以下。该方法准确可靠,可用于高纯四氟化锗中痕量气体杂质的测定。
基金supported by the National Key R&D Program of China(Grant No.2023YFC3209700)the National Natural Science Foundation of China(Grant Nos.41807194,41902263,41807208).
文摘Earthquake-related hydrochemical changes in thermal springs have been widely observed;however,quantitative modeling of the reactive transport process is absent.In the present study,we apply reactive transport simulation to capture the hydrochemical responses in a thermal spring following the Wenchuan Ms 8.0 and Lushan Ms 7.0 earthquakes.We first constrain deep reservoir geothermal fluid compositions and temperature by multicomponent geothermometry,and then a reactive geochemical transport model is constructed to reproduce the hydrochemical evolution process.The results show that the recharge from the shallow aquifer increases gradually until it reaches a peak because of the permeability enhancement caused by the Lushan earthquake,which may be the mechanism to explain the earthquake-related hydrochemical responses.In contrast to the postseismic effect of the Wenchuan earthquake,the chemical evolution can be considered as hydrochemical anomalies related to the Lushan earthquake.This study proves that the efficient simulation of reactive transport processes is useful for investigating earthquake-related signals in hydrochemical time series.
