中国环境空气苯系物类挥发性有机物监测能力现状分析

Analysis on the Status of Volatile Organic Compounds Monitoring Capability for Benzene in Ambient Air in China

为了解和评价中国环境空气挥发性有机物(VOCs)的监测能力和技术水平,以量化的手段评估环境空气VOCs监测数据质量,促进实验室质量管理水平提升,笔者以环境空气VOCs中的苯系物为代表,组织31个省、自治区、直辖市216家各级各类生态环境检验检测机构开展了实验室比对,利用稳健统计技术分析评价实验结果。结果表明:环境空气苯系物类VOCs比对结果的整体合格率为68.5%,省级站、地市级以上站、社会化检测机构合格率分别为86.7%、75.4%和46.9%。可见现阶段中国环境空气苯系物类VOCs整体检测能力仍有提升的空间,社会化机构的检测技术水平尚待提升。建议地方部门加强对环境空气VOCs监测的技术培训,尽快提高VOCs监测技术水平,保障VOCs监测数据质量,同时强化对社会化检测机构的监督管理,督促其提升服务水平。

In order to understand and evaluate the monitoring capability and technical level of VOCs in ambient air in China,and assess the monitoring data quality of VOCs by quantitative means to promote the level of laboratory quality management,a large scale of nationwide inter-laboratory comparison was organized,represented by benzene in ambient air VOCs.A total of 216 ecological environment testing laboratories from 31 provinces at all levels were participated,including various monitoring institutions.The robust statistical technique was used during the comparison.The results showed that the overall pass rate of VOCs for benzene in ambient air was 68.5%,the pass rates of provincial monitoring stations,municipal-level above monitoring stations and social inspection institutions were 86.7%,75.4%and 46.9%,respectively,which indicated that the overall detection capacity of VOCs for benzene in ambient air in China was good,but there was still room for improvement.However,there was a big gap for social inspection institutions.It was suggested that local governments should strengthen the technical training of VOCs monitoring as well as online monitoring,and improve the level of VOCs monitoring technology as soon as possible to ensure the quality of VOCs monitoring data.The supervision and management of social inspection institutions is also need to be strengthened to improve their service level.