有机碳同位素在全球变化、古气候和古环境恢复研究中的应用日益广泛和深入。有机碳同位素分析的基本原理是在高温下过量的氧气中将样品有机物氧化为CO2,通过分离纯化得到纯净的CO2气体送入质谱测定其δ^13C值。
The carbon isotopic composition of organic matter in soil has been widely used in global change research and in reconstruction of paleovegetation and paleoclimate. The basic principle of organic carbon isotopic analysis lies in transforming the organic matter into CO2 under the superfluous oxygen condition at high temperature, and then separating and purifying the resultants so as to get pure CO2 for determining their δ^13C.