The efficiency of the separation of the matrix is more than 99.9%. The recovery of standard addition of 15 trace impurities is 87—106%.
方法对于基体的分离效率达99.9%以上，痕量杂质的标准加料回收率在87—106%之间。
It contained high levels of impurities and unsafe levels of trace elements.
它含有高浓度的杂质和不安全的各级微量元素。
NF3 is a colorless gas. Trace quantities of impurities can impart a musty or pungent odor to the gas.
NF 3是无色气体。痕量的杂质会使气体带有一种霉味或刺激性气味。
The evaluation is that the eye is clean, there is no trace of impurities .
的评价是，眼睛里是干净的，没有一丝杂质。
The method of inductively coupled plasma-mass spectrometry for determination of impurities of 30 trace rare earth and non-rare earth elements in high purity ytterbium oxide was studied.
报道了高纯氧化钇中30种痕量稀土和非稀土杂质元素的电感耦合等离子体质谱测定方法。
The paper describes the analytical methods of trace level hydrocarbon impurities in pure ethene and propene.
本文介绍了聚合级乙烯和丙烯中烃杂质的分析方法。
The paper describes the analytical methods of trace level hydrocarbon impurities in pure ethene and propene.
本文介绍了聚合级乙烯和丙烯中烃杂质的分析方法。
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