1、 Methods A high performance liquid chromatography - mass spectrometry technology was developed.
方法采用高效液相色谱 - 质谱联用技术.
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2、 The isotopic abundance ratio and content are determined with isotopic mass - spectrometry.
文章用同位素质谱法测定了辐照堆元件铀的同位素丰度比和含量.
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