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气相色谱法测定公共场所室内空气中苯系物 被引量:1
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作者 徐文霞 《河北化工》 2010年第7期70-71,共2页
二硫化碳萃取法测定气体中苯系物的传统方法具有消解时间长、毒性大等缺点。利用超声波振荡消解可以使吸附在活性炭中的苯系物在较短的时间内较为彻底地溶解;采用水封法既可以防止二硫化碳及苯系物对化验员身体的伤害,又可以防止有机物... 二硫化碳萃取法测定气体中苯系物的传统方法具有消解时间长、毒性大等缺点。利用超声波振荡消解可以使吸附在活性炭中的苯系物在较短的时间内较为彻底地溶解;采用水封法既可以防止二硫化碳及苯系物对化验员身体的伤害,又可以防止有机物的挥发,使样品浓度的改变尽量降低。实验中苯系物的工作曲线相关系数均在0.999以上,标准样品的准确度及重复样品的精密度都符合质控要求。 展开更多
关键词 水封法 线性相关 精密度 准确度
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灭火要正确选用灭火剂和灭火方法
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作者 李春孝 《消防视点》 2002年第7期15-15,共1页
关键词 灭火剂 灭火方法 醇类 水封法扑救
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A new evaluation method for site selection of large underground water-sealed petroleum storage depots 被引量:3
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作者 XUE YiGuo LI ShuCai +7 位作者 QIU DaoHong WANG ZheChao LI ZhiQiang TIAN Hao SU MaoXin YANG Wei Min LIN ChunJin ZHU JianYe 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2015年第6期967-978,共12页
Scientific site selection is the first step in constructing underground water-sealed petroleum storage depots, but no uniform standard and code for such activity has been established. Therefore, the main objective of ... Scientific site selection is the first step in constructing underground water-sealed petroleum storage depots, but no uniform standard and code for such activity has been established. Therefore, the main objective of this study is to propose an evaluation method for the site selection of an underground water-sealed petroleum storage depot. The first large underground water-sealed petroleum storage depot being built in China served as the background of this study. The following 12 indexes were used as evaluation factors based on comprehensive evaluation criteria and specifications for key project site selection: geographic structure development feature, topographic feature, lithostratic formation feature, crustal stress, strength of rock mass, joint development feature, hydrogeological conditions, long-term water sealing conditions, environmental/ecological vulnerability, regional stability, technical and economic conditions, and meteorological and hydrological conditions. The weight back analysis and power coefficient methods were also used to evaluate the site selected for the first underground water-sealed petroleum storage depot project. Petroleum site classification models based on the two aforementioned methods were established and used to verify the feasibility of the evaluation criteria and methods, and the evaluation results show the grade of the site selected for the underground water-sealed petroleum storage depot in Huangdao, China is good. The study results may be used as a reference for the site selection of future underground water-sealed petroleum storage depots. 展开更多
关键词 underground water-sealed petroleum storage depot selected site grade evaluation method weight back analysis efficiency coefficient method
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