摘要
在广州某商住区楼顶开展为期1个月的大气样品连续采样,利用高分辨气相色谱-高分辨质谱仪测定了样品中17种毒性二（噁）英（PCDD/Fs）的含量.结果表明,该采样点位样品二（噁）英Ⅰ-TEQ浓度范围为0.094～ 1.34 pg I-TEQ/m3,样品日平均浓度相对偏差范围为3.2％ ～118.8％,6日平均浓度相对偏差范围为1.2％ ～60.1％,6日平均值更能较好地反映样品长期平均浓度.气象变化对样品中二（噁）英Ⅰ-TEQ浓度有明显影响,降雨后样品中的二（噁）英Ⅰ-TEQ浓度明显低于降雨前,降雨前或降雨中样品的二（噁）英Ⅰ-TEQ浓度与降雨后样品比值最高达到9.0,样品二（噁）英Ⅰ-TEQ浓度与PM25的线性相关性高于其与TSP、温度相关性,上述三者的r值和P值分别为0.637、-0.296、0.271和0.611、0.326、0.329.
Atmospheric samples were continuously collected day by day during a month at a residential area in Guangzhou.The concentrations of the polychlorinated p-dibenzodioxins and dibenzofurans （PCDD/Fs） in the samples were analyzed by high resolution gas chromatography/high resolution mass spectrometry.The results showed that the mean value of Ⅰ-TEQ of the daily air samples ranged from 0.094 pg Ⅰ-TEQ/m3 to 1.34 pg Ⅰ-TEQ/m3.The relative error range of the daily mean Ⅰ-TEQ value was 3.2％-118.8％.However,for the 6-day mean of the air samples,the relative error range was 1.2％-60.1％,which was less than that of the daily mean value.This reflects that the 6-day mean Ⅰ-TEQ value maybe represent the long-term concentration level of the collecting sample enviroment.The changes of the meteorology perceptibly affect the mean Ⅰ-TEQ values,the mean Ⅰ-TEQ values of samples collected after the rainfall was apparently lower than that of the sample colected before rainfall,and the ratio up to 9.0.The linear correlation of the mean Ⅰ-TEQ values to PM2.5 is better than that to TSP and to temperature＇s,the R and P were 0.637、-0.296、0.271 and 0.611、0.326、0.329,respectively.
出处
《中国环境监测》
CAS
CSCD
北大核心
2013年第5期64-68,共5页
Environmental Monitoring in China
基金
公益性行业科研专项(200909095B)
