School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China.
Sci Total Environ. 2012 Sep 1;433:44-9. doi: 10.1016/j.scitotenv.2012.06.038. Epub 2012 Jul 4.
The distribution of PBDEs in the mountains of the Central Tibetan Plateau (CTP) was determined by sampling soil along an elevation transect. The analysis of soil extracts was performed by gas chromatography and high-resolution mass spectrometry, through which 42 congeners were detected. The samples were also characterized with respect to the soil organic carbon (SOC) and mineral contents. The logarithmic concentration for three of the fractions and the ΣPBDEs increased significantly and exponentially with altitude. The slope value of the linear regression between the logarithm of the clay-normalized three fractional concentrations and the altitude is in the following order: light>intermediate<heavy. The coefficient of determination between the logarithm of normalized concentration and the altitude indicates that in the CTP, the clay normalization exhibits a better correlation to altitude than does the SOC normalization. The exponential equation between the concentration and altitude was modified by accounting for the localized soil properties. The exponential equation between the concentration and altitude was modified by accounting for the localized soil properties.
本研究通过沿海拔梯度采集土壤样品，测定了青藏高原中部山区（CTP）多溴二苯醚（PBDEs）的分布。采用气相色谱-高分辨质谱法分析土壤提取物，共检测到 42 种同系物。此外，还对土壤有机碳（SOC）和矿物质含量进行了特征分析。对数浓度分析表明，三种分馏物和ΣPBDEs 的浓度随海拔的升高呈显著的指数增长趋势。线性回归中粘土归一化的三个分馏浓度对数与海拔的斜率值依次为：轻>中<重。归一化浓度与海拔之间的决定系数表明，在 CTP，粘土归一化与海拔的相关性优于 SOC 归一化。通过考虑局部土壤特性，对浓度与海拔之间的指数方程进行了修正。
