同位素比 isotope ratio
- 本文介绍了离子流强度累计测定同位素比的方法。
A method by cumulative intensity of ion current to analyse isotopic ratio is proposed in present paper. - 一种检测甲烷是否是由生命制造的方法是同位素比测试。
One method to test whether life produced this methane is by measuring isotope ratios. - 用同位素比质谱方法可在4或5天之内检测到阳性结果。
The positive result could be achieved within 4 or 5 days.
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