isotopic ratio

基本解释

A method by cumulative intensity of ion current to analyse isotopic ratio is proposed in present paper.
本文介绍了离子流强度累计测定同位素比的方法。
The isotopic ratio of lithium was determined by cumulating intensity of ion current during evaporation of all samples on evaporation filament.
用热表面离子源测定了锂同位素丰度，在样品全耗尽过程中累计离子流强度。
The natural gas in the Ordovician of the central-eastern part of the basin is divided into four migration fields by using the data of carbon isotopic ratio in methane.
利用甲烷碳同位素资料将盆地中东部奥陶系天然气划分出四个运移场。