C、H、O稳定同位素在树木植株不同部位的分馏规律研究

Stable Isotope Fractionation of C, H and O in Different Parts of Tree

摘要: 采用同位素比率质谱仪分别测定了树木不同部位的δ¹³C、δ¹⁸O和δ²H值。结果表明：δ¹³C值在研究树种植株不同部位的变化相对最小，其次是δ¹⁸O值，δ²H值最大。对于橡胶木、铁刀木和羊蹄甲3个树种，C和O元素是实现其木材产地稳定同位素溯源较理想的元素。

Abstract: Isotope ratio mass spectrometer was adopted to determine δ¹³C, δ¹⁸O and δ²H values in different parts of the tree. The findings indicated that the δ¹³C values in wood different part were the smallest, followed by the δ¹⁸O value and the δ²H value. For the 3 tree species of Hevea brasiliensis, Cassia siamea and Bauhinia blakeana, C and O are ideal elements for stable isotopic traceability of wood origin.