我国不同城市油松树皮中溴酚的赋存特征

Occurrence of bromophenols in pine bark from different cities in China

本文采集了我国内陆和沿海地区多个城市的油松树皮样品,利用超高效液相色谱-质谱(UPLCMS/MS)联用技术,分析了样品中19种溴酚的赋存特征.结果表明,树皮中4-BP、2,4,6-TBP、PBP等3种溴酚分布最广,检出率分别为72%、41%和38%,19种溴酚的总浓度水平在0.69-38 ng·g^(-1),平均值为6.6 ng·g^(-1).溴酚的分布存在较大的单体差异及城市差异,沿海城市树皮样品中的浓度高于内陆城市,树皮样品中的溴酚含量整体上随海拔高度的增加而升高.而溴酚的单体分布特征和地区分布差异均与其人为源和天然源密切相关.

In this study, pine bark samples were collected from several cities in inland and coastal regions of China. The occurrence of 19 bromophenols were analyzed by Ultra Performance Liquid Chromatography-Mass Spectrometry(UPLC-MS/MS). The results showed that 4-BP, 2,4,6-TBP and PBP were the most frequently determined bromophenols in bark with the detection frequencies of72%, 41% and 38%, respectively. The total concentrations of all detectable bromophenols ranged from 0.69 ng·g^(-1) to 38 ng·g^(-1), with an average value of 6.6 ng·g^(-1). Different spatial and profile distributions of bromophenols were found in different cities. The bromophenols in coastal cities showed relatively high concentrations. And the levels of BPs were generally increased with the increasing of elevation. The differences were closely related to their anthropogenic and natural sources.