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浅析化学检测实验室的方法验证与确认 被引量:1
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作者 谭成钢 《科技风》 2016年第24期103-103,共1页
依照相关控制标准,为了证实所用手段是满足所确定目标的需要的,化学科目测定实验台须对所应用的测试流程展开验证及认可过程,基于此,应出具现实证据材料来证明所实施手段的预定功用是否已获得实现。文章以手段明确及验实的概念、应用的... 依照相关控制标准,为了证实所用手段是满足所确定目标的需要的,化学科目测定实验台须对所应用的测试流程展开验证及认可过程,基于此,应出具现实证据材料来证明所实施手段的预定功用是否已获得实现。文章以手段明确及验实的概念、应用的区间规定为依托,对照了二者的区别;商议了实施方案证实的恰当时机以及实施手段认定的时间窗口,另外包括实施方法认定及证明的相关流程。同时,笔者也探讨了手段认定及证明环节中牵扯到的功能数据,涵盖准确性、正确性、精密性、线型性、检出域、定量域、选取性/异质性及测量误差域,给手段验证及证实过程的开展提供了依据。 展开更多
关键词 手段认定 方案证明 化学测定实验 概念解析
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不同产地辽细辛质量比较 被引量:6
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作者 吴艳蓉 王庆 孙启时 《中国现代中药》 CAS 2015年第2期118-121,共4页
目的:比较不同产地中药材辽细辛的质量。方法:用水蒸气蒸馏法提取并测定挥发油的含量,GC-MS法测定挥发油中甲基丁香酚、黄樟醚和榄香脂素的相对含量,HPLC测定马兜铃酸A的含量,原子分光仪等测定药材中无机元素的含量,并用SPSS统计分析系... 目的:比较不同产地中药材辽细辛的质量。方法:用水蒸气蒸馏法提取并测定挥发油的含量,GC-MS法测定挥发油中甲基丁香酚、黄樟醚和榄香脂素的相对含量,HPLC测定马兜铃酸A的含量,原子分光仪等测定药材中无机元素的含量,并用SPSS统计分析系统进行聚类分析。结果:化学试验测定与聚类分析的结果基本一致,5个产地的辽细辛药材聚为3类。结论:应把挥发性成分(挥发油总量、甲基丁香酚、榄香脂素)、有益的无机元素含量高,毒副作用成分黄樟醚、马兜铃酸A和重金属元素含量低作为评价中药材辽细辛质量的依据。将化学试验与聚类分析相结合,使结果分析更为快速、准确。 展开更多
关键词 辽细辛 不同产地 质量比较 化学实验测定 聚类分析
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Development and Lubricating Properties of Rolling Oil for Stainless Steel Cold Rolling 被引量:4
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作者 Zhang Xu Wang Yizhu +2 位作者 Yao Wenjing Sun Jianlin Wang Shiting 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2011年第2期57-64,共8页
Appropriate base oils and homologous additives such as extreme pressure and anti-wear agents,oiliness agents and antioxidants were selected,and experiments testing the compatibility performance between additive,base o... Appropriate base oils and homologous additives such as extreme pressure and anti-wear agents,oiliness agents and antioxidants were selected,and experiments testing the compatibility performance between additive,base oil and other components were carried out to develop the SK and SD series of rolling oils for cold rolling of stainless steel.The developed oils were used in the stainless steel cold rolling lubrication experiments,and were successfully applied in the actual cold rolling operation of stainless steel.Compared with a foreign product,the tribological properties,the thermal oxidation stability,and the rolling lubrication performance of the developed stainless steel cold rolling oils were studied.Test results showed that the tribological properties of the thereby developed rolling oils and the reference one were almost at the same level,and to some extent the performance of rolling was even better than the foreign product,at the same time the stainless steel sheet could retain its well annealed performance.Meanwhile,within a certain range,the lubrication of the rolling oil became better as its viscosity increased at the same level of saponification value,which could provide a lower friction coefficient,so that a higher maximum reduction ratio of the rolled piece through a constant roll gap and a minimum thickness could be secured.Also,similar phenomena appeared as the saponification value increased at a same viscosity level of the rolling oils. 展开更多
关键词 stainless steel cold rolling oil rolling lubrication FRICTION thermal analysis
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Obtain Thematic Maps of Diyarbakir Basalt Aquifer's Water Quality Parameters with Using GIS Technique
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作者 Recep Celik 《Journal of Environmental Science and Engineering(A)》 2016年第3期163-170,共8页
In this study, groundwater quality and water features of Diyarbakir urban basalt aquifer which contains Baglar, Kayapmar, Sur and Yenisehir residential areas aimed to be determined. At this location, water wells opene... In this study, groundwater quality and water features of Diyarbakir urban basalt aquifer which contains Baglar, Kayapmar, Sur and Yenisehir residential areas aimed to be determined. At this location, water wells opened for drinking water and irrigation water are used in the agricultural field. Therefore, in the study area, which opened in water samples taken from water wells were examined. It was reformed in the field, water samples were taken from the predrilled water wells. Water wells in the same coordinates are determined by Garmin etrex 30 handheld GPS system. Chemical analysis of water samples taken in the laboratory was made. The wells water's pH, Electrical Conductivity (EC) and Dissolved Solids (TDS) features were acquired by Portable Hanna HI 98125 pH/EC/TDS/℃ meter device at the field. At this study, basalt aquifer features are considered, and water quality and water chemical properties were determined in Diyarbakir city centre, pH, EC and TDS values of the water samples taken on site and those water chemical analyses were measured in the laboratory. Then, they were modelled by using ARC INFO 10.2.1 GIS programme and geostatistical analyst extension tool. At the end of this process, thematic map of Diyarbakir's basalt aquifer pH, EC and TDS were produced. 展开更多
关键词 GROUNDWATER GIS water quality Diyarbaklr city center.
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Effects of vacancies on interwall spacings of multi-walled carbon nanotubes
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作者 Ming-du MA Jefferson Zhe LIU +2 位作者 Li-feng WANG Lu-ming SHEN Quan-shui ZHENG 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2010年第10期714-721,共8页
We use molecular dynamics (MD) simulations to study the effects of vacancies on tube diameters and interwall spacings of multi-walled carbon nanotubes (MWCNTs). Two types of vacancies, double vacancy and three danglin... We use molecular dynamics (MD) simulations to study the effects of vacancies on tube diameters and interwall spacings of multi-walled carbon nanotubes (MWCNTs). Two types of vacancies, double vacancy and three dangling-bond (3DB) single vacancy, are identified to have opposite effects on the tube size change, which explains the inconsistency of the experimentally measured interwall spacings of MWCNTs after electron beam irradiation. A theoretical model to quantitatively predict the shrunk structures of the irradiated MWCNTs is further developed. We also discuss the fabrications of prestressed MWCNTs, in which reduced interwall spacings are desired to enhance the overall elastic modulus and strength. 展开更多
关键词 Multi-walled carbon nanotubes (MWCNTs) Noise carbon nanotubes Electron beam irradiation DEFECTS
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