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- reference material of gases 气体标准样品
- Test materials and reference materials of quality research. 质量研究工作的试验资料及文献资料。
- It introduces the method of preparation,research of performance and calculation of uncertainty of mixed gas reference material of tetrafluoromethane,nitrous oxide and hexafluoride in helium. 论述了氦中四氟甲烷、氧化亚氮和六氟化硫混合气体标准物质的制备方法、性能考察、不确定度计算,经与国内外同类标准物质比较,证明量值准确可靠、方法可行。
- The developing process of the certified reference material of polymethyl methacrylate for oxygen index was introduced. 介绍聚甲基丙烯酸甲酯氧指数标准物质的研制过程。
- Objective: To investigate the preparation of the reference material of neferine. 目的制备甲基莲心碱对照品。
- With the method of social medicine and medical statistics,the fourth population censuses reference material of Henan was analysed. 采用老年社会医学与医学统计学方法，对河南省第4次人口普查资料进行了系统地研究分析。
- gas reference material of carbon dioxide in air 空气中二氧化碳标准气体
- Chemists study the nature of gases. 有的化学家研究气体的性质。
- Technology on purification of HMX was studied with the industrial special-class product as primary substance,and the certified reference material of HMX prepared. 以工业特级品HMX为基体,研究了HMX的纯化工艺,制备出军用纯度标准物质HMX。
- Certified reference material of the high-purity silicasol was prepared by removing impurity ions from the high purity silicasol according to the ion exchange resin. 采用离子交换法实现了高纯硅溶胶主成分与众多杂质离子的分离,并制备了高纯硅溶胶标准物质。
- Although the person such as Wang Bo has literary talent, but dry of gas knowledge float is meager, where be to enjoy curule the material of thick the rank of nobility? 王勃等人虽然有文才，但气识浮燥浅陋，哪里是享用高官厚爵的材料呢？杨炯气质略微宁静沉稳，应该可以做到县令，其余的几个人能够善始善终就是万幸的了。"
- A whole tankful of gas dropped away because of the tiny leak. 由于这个小小的漏洞，整整一油箱的汽油都漏光了。
- The ESI-MS indicated that the molecular weights and MS fragmentation pattern of the antioxidants in the extracts were similar to the reference material of rutin and quercetin. 电喷雾质谱分析表明，荞麦籽粒乙醇提取物中抗氧化成分的分子量和质谱碎裂行为分别与对照品芦丁和槲皮素的相同。
- When wine is fermented it gives off bubbles of gas. 酒发酵时会放出气泡。
- Three elements in the reference materials of Sn-alloy were analyzed by ED-XRF. 本文提出X荧光能谱法测定锡基合金中三个元素含量的方法。
- Air is a mixture, not a compound of gases. 空气是气体的混合物，不是化合物。
- There are several kinds of gas in the air. 空气中有几种气体。
- A liter of gas has less mass than a liter of water. 一公升气体的质量少于一公升水的质量。
- The fullerene (C60) has been reliably determined in the coal collected from Lufeng of southwestern China, by means of HPLC combined with comparison experiment of reference material of pure C60. 首次采用标样对照并利用高效液相色谱(HPLC)，从中国云南禄丰原煤部分样品抽提物中检测到微克级水平的富勒烯(C60)。
- Five elements in the reference materials of the alloy steels were analyzed by EDXRF. 本方法采用能谱仪中定量分析软件,选择适当工作条件,测定合金结构钢中五个元素。
