计算同位素分布（ isotopic distribution），元素组成（ elemental composition），原子量（ molecular mass）, exact mass and molecular formula.
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化学组成 chemical composition; chemicalcompound; elemental composition 化学组分 chemical composition; chemicalconstituent ..
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Potassium sulphate - Elemental composition 硫酸钾中元素组成
elemental composition analyses 元素成分分析
elemental composition analysis 元素组成分析
elemental composition chromatogram 元素组成色谱
The bioconverted product was purified and structure was further identified as 6-hydroxymethyl-simvastatin (elemental composition C_(25)H_(40)O_7, with parent ion M+ 453.
转化产物分子量453.1，元素组成C_(25)H_(40)O_7，为6-羟甲基-辛伐他汀。
参考来源 - 辛伐他汀的微生物转化及产物性质研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Trace elements in soil of Tumotezuoqi were similar to the background levels of elemental composition of soil in the world.
土壤中微量元素的含量与世界土壤背景值相似。
The elemental composition and valence state of the elements and their changes with the variation of depth were investigated by mains of XPS.
用XPS研究了渗硼层磨损表面的成分、元素价态及其随深度的变化。
The elemental composition and the temperature of thermal explosion are principal factors to influence the reactions and morphology of the products.
体系成分和热爆温度是影响反应及产物形态的主要因素。
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