| 基于DTT法测量广州市区PM2.5的氧化潜势 |
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| 引用本文： | 张曼曼,李慧蓉,杨闻达,孙嘉胤,吴晟,程鹏,唐明金.基于DTT法测量广州市区PM2.5的氧化潜势[J].中国环境科学,2019,39(6):2258-2266. |
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| 作者姓名： | 张曼曼 李慧蓉 杨闻达 孙嘉胤 吴晟 程鹏 唐明金 |
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| 作者单位： | 1. 暨南大学质谱仪器与大气环境研究所, 广东省大气污染在线源解析系统工程技术研究中心, 广东 广州 510632;
2. 中国科学院广州地球化学研究所, 广东 广州 510640 |
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| 基金项目： | 国家自然科学基金资助重大研究计划（91644218）；有机地球化学国家重点实验室开放基金资助课题（SKLOG-201719）；国家重点研发计划项目（2017YFC0210104）；国家自然基金青年基金资助项目（41405002） |
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| 摘 要： | 大气颗粒物氧化潜势（Oxidative potential）常用于表征颗粒物对人体健康的影响.二硫苏糖醇（DTT）法是近年发展的一种测定颗粒物氧化潜势的方法，本研究改进了该方法的颗粒物提取方式和反应流程，并开展了广州市区PM2.5氧化潜势（DTTm&DTTv）的测量.结果表明，广州市区2018年1月和4月PM2.5的DTTm值分别为（13.47±3.86），（14.66±4.49）pmol/（min·μg），DTTv值分别为（4.67±1.06），（4.45±1.02）nmol/（min·m3），与国内外研究结果相当.DTTv与PM2.5质量浓度、OC、EC、BC具有较强的相关性，但DTTm与以上参数相关性低，说明含碳组分不是广州市PM2.5氧化潜势的主要贡献者.
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| 关 键 词： | 二硫苏糖醇(DTT) 氧化潜势 ROS 氧化应激 PM2.5 |
| 收稿时间： | 2018-10-09 |
Measurement based on DTT method of the PM2.5 oxidative potential in Guangzhou urban area |
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| ZHANG Man-man,LI Hui-rong,YANG Wen-da,SUN Jia-yin,WU Cheng,CHENG Peng,TANG Ming-jin.Measurement based on DTT method of the PM2.5 oxidative potential in Guangzhou urban area[J].China Environmental Science,2019,39(6):2258-2266. |
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| Authors: | ZHANG Man-man LI Hui-rong YANG Wen-da SUN Jia-yin WU Cheng CHENG Peng TANG Ming-jin |
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| Institution: | 1. Guangdong Provincial Engineering Research Center for On-line Source Apportionment System of Air Pollution, Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou 510632, China;
2. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China |
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| Abstract: | Oxidative potential can be used to characterize the impact of atmospheric particulate matter on human health. The DTT assay is a method recently developed to determine the oxidation potential of particulate matter. The extraction and reaction process of the DTT method were improved, and the method was employed to measure the oxidation potential of PM2.5 (DTTm & DTTv) at an urban site in Guangzhou. The DTTm values of PM2.5 in Guangzhou in January and April 2018 were found to be (13.47±3.86), (14.66±4.49) pmol/(min·μg), and the DTTv values were measured to be (4.67±1.06), (4.45±1.02) nmol/(min·m3), respectively. DTTv showed strongly correlations with mass concentration of PM2.5, OC, EC and BC, but no correlations were found between DTTm and carbonaceous particles, implied that carbonaceous particles is not the major contributor to oxidative potential of PM2.5 in Guangzhou. |
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| Keywords: | dithiothreitol (DTT) oxidative potential ROS oxidative stress PM2 5 |
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