isotopic ratio

基本解释

A method by cumulative intensity of ion current to analyse isotopic ratio is proposed in present paper.
本文介紹了離子流強度累計測定同位素比的方法。
The isotopic ratio of lithium was determined by cumulating intensity of ion current during evaporation of all samples on evaporation filament.
用熱表麪離子源測定了鋰同位素豐度，在樣品全耗盡過程中累計離子流強度。
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.
利用甲烷碳同位素資料將盆地中東部奧陶系天然氣劃分出四個運移場。