and accurate isotopic abundance, isotopic ratio and delta value can be computed by selecting proper equations.
给出八个计算丰度公式和两个计算同位素比公式。本文最后用实验结果证实各式的正确性。
in the safeguards environmental sampling, analyzing isotopic ratio of single uranium-bearing particle in swipe samples was very important.
在核保障环境取样分析中,对含铀单微粒进行元素和同位素分析是十分重要的。
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。
however, the boron isotopic ratio decreases with increasing in concentration of graphite. especially, the method of adding the nbs 951+ graphite result in the lowest boron isotopic ratio.
不管那种涂样方式,硼标準同位素比值都随着石墨用量的增加而相应地减小。
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。