They are different from each other in toluene contents, the carbonisotopecomposition of ethane and the nitrogen and mercury vapor contents, etc.
二者在甲苯、乙烷的碳同位素组成，氮气和汞蒸气含量等方面存在着一定的差异。
2
Using GC/C/MS online carbonisotope analytic technic, abundant imforma- tion about single molecular carbonisotopecomposition can be taken from micro-samples(chromatographical scale).
MS 在线碳同位素分析技术，能够从微量样品（ 色谱量级）中获得丰富的单分子碳同位素组成信息。
3
Composition of carbon and oxygen isotope indicates that origin of carbon comes from mixture of the crust and mantle.