排序方式: 共有6条查询结果,搜索用时 15 毫秒
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介绍了采用称量法制备瓶装1μmol/mol氮气中42个组分挥发性有机物(VOCs)标准物质的研制方法。建立了选择离子模式,气相色谱-质谱联用的分析方法,对目标组分在气瓶中的长期稳定性进行了考察。所选择的42种目标组分完全满足中国环境保护标准《环境空气挥发性有机物的测定吸附管采样-热脱附/气相色谱-质谱法》(HJ 644—2013)和美国环保署《使用特殊处理的采样罐/气相色谱仪检测环境大气中的挥发性有机物》(EPA TO—14A)这2个方法标准中所规定的环境空气中挥发性有机有害成分的监测要求。将研制的气体标准物质与中国计量科学研究院(NIM)和英国国家物理实验室(NPL)分别进行了比对测试,取得了良好的比对结果与国际等效度。结果表明,1μmol/mol氮气中42种组分VOCs标准物质的有效期为一年,相对扩展不确定度为5.0%(包含因子k=2),并取得国家标准物质证书GBW(E)062231。 相似文献
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Yu Zhiang Ma Yuxia Zhang Yifan Cheng Bowen Feng Fengliu Ma Bingji Jiao Haoran Zhou Ji 《Environmental geochemistry and health》2021,43(10):4123-4138
Environmental Geochemistry and Health - Recently, particulate matter pollution has been worsening, which has been affecting the asthma visits in children. In this study, we assessed the short-term... 相似文献
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Yu Xiaoxiao Hu Xiangming Cheng Weimin Zhao Yanyun Shao Zhiang Xue Di Wu Mingyue 《Environmental science and pollution research international》2022,29(12):17072-17086
Environmental Science and Pollution Research - To mitigate environmental pollution caused by the escape of dust during coal storage and transportation, humic acid (HA) and grafted acrylamide (AM)... 相似文献
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Ma Yuxia Zhang Yifan Cheng Bowen Feng Fengliu Jiao Haoran Zhao Xiaoyan Ma Bingji Yu Zhiang 《Environmental science and pollution research international》2020,27(34):42335-42345
Environmental Science and Pollution Research - The Intergovernmental Panel on Climate Change (IPCC) reported that global climate change has led to the increased occurrence of extreme weather... 相似文献
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防爆产品作为一种重要的警用防护装备越来越受到公安机关的重视。本文对各类防爆产品的相关标准和要求进行了介绍,分析和比较了各类防爆产品的防爆机理及防爆性能,阐述了各类防爆产品的应用范围,最后对防爆产品的应用和研究提出了建议。 相似文献
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