On the basis of geological investigating work and experimental studies on slide zone soil of one landslide in Tibet,the authors analyzed granulometric composition,clay mineral composition and physical and mechanical p...On the basis of geological investigating work and experimental studies on slide zone soil of one landslide in Tibet,the authors analyzed granulometric composition,clay mineral composition and physical and mechanical properties for the soil in the slide zone.The soil samples are gravel containing fine particle.Particles larger than 2 mm occupy the main proportion with the content 51.5%--68.5%.The relative content of clay minerals is low.The clay minerals are illite smectite mixed layer and kaolinite,and their relative contents are 6%--13% and 4%-11%,respectively.The main mineral ingredient is quartz and the relative content is over 30%.Therefore,the soil’s hydrophily is poor.The cohesion and internal friction angle are high,causing preferable physical-mechanical features of slide zone soil.On the basis of the obtained data,the landslide stability is evaluated by means of limit equilibrium method.The safety factors are 3.191 and 1.92 respectively under both natural and normal water level conditions.The study results show that the landslide is stable.It can provide the appropriate basis and reference for landslide stability evaluation and landslide control in Tibet.展开更多
液相色谱串联三重四极杆质谱(liqui dchromatography tandem triple quadrupole mass spectrometry,LC-MS/MS)广泛应用于环境分析、食品安全、药物代谢研究、生物医学等领域,主要用于复杂样品基质中痕量目标物检测,既适用于小分子有机...液相色谱串联三重四极杆质谱(liqui dchromatography tandem triple quadrupole mass spectrometry,LC-MS/MS)广泛应用于环境分析、食品安全、药物代谢研究、生物医学等领域,主要用于复杂样品基质中痕量目标物检测,既适用于小分子有机化合物定性,又可用于痕量化合物定量.其主要检测模式是多反应监测模式(multiple reaction monitoring,MRM),以定性离子对的丰度比来进行定性,以定量离子对的峰响应进行定量,在MRM检测模式下具有出色的检测灵敏度和定量功能.LC-MS/MS的合理规范使用与维护保养,是保证检测数据准确有效、仪器可持续正常运行的基本要求,也是降低仪器维修成本的重要举措.阐述了安捷伦LC-MS/MS的工作原理、开机与关机、调谐,探讨了常见的故障及应对措施、日常维护保养的内容,旨在为合理规范使用仪器提供参考.展开更多
基金Supported by the Science and Technology Development Planning Project of Jilin Province(No.201201057)
文摘On the basis of geological investigating work and experimental studies on slide zone soil of one landslide in Tibet,the authors analyzed granulometric composition,clay mineral composition and physical and mechanical properties for the soil in the slide zone.The soil samples are gravel containing fine particle.Particles larger than 2 mm occupy the main proportion with the content 51.5%--68.5%.The relative content of clay minerals is low.The clay minerals are illite smectite mixed layer and kaolinite,and their relative contents are 6%--13% and 4%-11%,respectively.The main mineral ingredient is quartz and the relative content is over 30%.Therefore,the soil’s hydrophily is poor.The cohesion and internal friction angle are high,causing preferable physical-mechanical features of slide zone soil.On the basis of the obtained data,the landslide stability is evaluated by means of limit equilibrium method.The safety factors are 3.191 and 1.92 respectively under both natural and normal water level conditions.The study results show that the landslide is stable.It can provide the appropriate basis and reference for landslide stability evaluation and landslide control in Tibet.
文摘液相色谱串联三重四极杆质谱(liqui dchromatography tandem triple quadrupole mass spectrometry,LC-MS/MS)广泛应用于环境分析、食品安全、药物代谢研究、生物医学等领域,主要用于复杂样品基质中痕量目标物检测,既适用于小分子有机化合物定性,又可用于痕量化合物定量.其主要检测模式是多反应监测模式(multiple reaction monitoring,MRM),以定性离子对的丰度比来进行定性,以定量离子对的峰响应进行定量,在MRM检测模式下具有出色的检测灵敏度和定量功能.LC-MS/MS的合理规范使用与维护保养,是保证检测数据准确有效、仪器可持续正常运行的基本要求,也是降低仪器维修成本的重要举措.阐述了安捷伦LC-MS/MS的工作原理、开机与关机、调谐,探讨了常见的故障及应对措施、日常维护保养的内容,旨在为合理规范使用仪器提供参考.
