标准进样口具有自动ON/OFF功能 能自动对从储液器中导入的质量校准的标准物质(PFK)进行ON/OFF 控制,减轻了标准物质对离子源的污染,保持了长时间稳定的灵敏度。
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根据化学成分量的溯源链,将化学成分量标准物质从上至下划分为三个等级,即基准物质(PrimaryRM)、一级标准物质(Certified RM)、二级标准物质(Secondary RM)。
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1.一级标准物质 一级标准物质(primary reference material)是用绝对测量法或两种以上 不同原理的准确可靠的方法定值,若只有一种定值方法,可采取多个实验室合作定值。
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标准物质 reference material ; GBW ; standard material ; Standard substance
有证标准物质 certified standard material ; certified reference material ; certified reference material producer
基准物质 primary standard ; primary standard substance ; standard substance ; standard chemicals
光谱标准物质 spectrographic standard substance ; SSS
一级标准物质 Primary Reference Material ; GBW ; primary standard substance
热重法温度标准物质 temperature standard material for TG
二级标准物质 Secondary Reference Material ; working reference materials ; secondary standard substance
差热分析温度标准物质 temperature standard material for DTA
国际标准物质数据库 COMAR
该比对中的三种样品是由一些具有已知核素比活度的标准物质或准标准物质构成,而另一种是活度未知的盲样。
Three samples consisted of standard or quasi-standard substances with known specific activities of some nuclides while the radioactivity of the other sample was unknown.
因为他发现了“准晶体”,这一发现从根本上改变了我们对固体物质的认知。
Schechtman discovered what are called quasicrystals, a finding that fundamentally altered the understanding of solid matter.
相图主要研究处于平衡状态或准平衡状态下,物质的组分、物相和外界条件的关系。
The main study of the Phase Diagram is the relationships between the matter's components and its phases with the outside conditions.
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