共查询到18条相似文献,搜索用时 109 毫秒
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根据JJF1059-1999《测量不确定度评定与表示》,JJG376-1985《电导仪试行检定规程》,经过测量不确定度分析。探讨了在进行电计与电导池配套检定时,由不同级别的国家电导率指标物质及配套设备组成的检定装置所适合检定的电导率仪,以及检定装置的最佳配置。 相似文献
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探讨了非色散原子荧光光度计检定中部分技术指标与检测方法对高灵敏度、智能化新型仪器的适应性,提出了相关修改补充建议。经实际计量检定证明行之有效,较好的解决了实际工作中遇到的无法实施或检定指标与具体检测要求不相适应的问题,保证了计量检定后仪器分析结果的准确程度与公正性。 相似文献
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将液相色谱仪检定规程JJG 705–2014与JJG 705–2002在检定方法、检定条件、技术指标三个方面进行对比并说明更改的缘由,对新规程进行详细解读,重点介绍新规程变化内容,最后介绍增加蒸发光散射检测器的缘由及指标。新规程使检定方法更合理,提高了检定效率,满足了市场发展的需要。 相似文献
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对总悬浮颗粒物测试仪检定结果的不确定度进行了评定,分析了检定过程中不确定度的主要来源,如计量标准、测量重复性、检定装置示值误差等.对各不确定度分量进行了量化,求得检定结果的相对扩展不确定度为1.8%(k=2).对检定结果不确定度评定的合理性进行了验证. 相似文献
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Sergey S. Golotvin Rostislav Pol Ryan R. Sasaki Asya Nikitina Philip Keyes 《Magnetic resonance in chemistry : MRC》2012,50(6):429-435
Automated structure verification using 1H NMR data or a combination of 1H and heteronuclear single‐quantum correlation (HSQC) data is gaining more interest as a routine application for qualitative evaluation of large compound libraries produced by synthetic chemistry. The goal of this automated software method is to identify a manageable subset of compounds and data that require human review. In practice, the automated method will flag structure and data combinations that exhibit some inconsistency (i.e. strange chemical shifts, conflicts in multiplicity, or overestimated and underestimated integration values) and validate those that appear consistent. One drawback of this approach is that no automated system can guarantee that all passing structures are indeed correct structures. The major reason for this is that approaches using only 1H or even 1H and HSQC spectra often do not provide sufficient information to properly distinguish between similar structures. Therefore, current implementations of automated structure verification systems allow, in principle, false positive results. Presented in this work is a method that greatly reduces the probability of an automated validation system passing incorrect structures (i.e. false positives). This novel method was applied to automatically validate 127 non‐proprietary compounds from several commercial sources. Presented also is the impact of this approach on false positive and false negative results. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
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我国粘度计量工作中存在的问题 总被引:1,自引:0,他引:1
指出我国粘度计量工作中存在的一些问题,在修订粘度计检定规程,规范标准粘度的名称和有效期以及加强对粘度计检定工作的管理等方面的出了建议,强调了在标准粘度液证书中应给出不同温度下的运动粘度和粘度值,以满足粘度计检定工作的需要。 相似文献
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气相色谱仪检定结果的不确定度评定 总被引:2,自引:0,他引:2
气相色谱仪检定结果的不确定度主要来源于流速稳定性、柱箱温度稳定性、基线噪声、定量重复性和标准物质进样量的不确定度。以TCD检测器为例进行分析,对气相色谱仪检定结果的不确定度进行评定,相对扩展不确定度为5%。 相似文献