Chi Chenchen, Xia Meng, Zhou Chen, Wang Xueqing, Weng Mili, Shen Xueyou
College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China.
College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang National Radiation Environmental Technology Co., Ltd., Hangzhou 310011, China.
J Environ Sci (China). 2017 May;55:137-145. doi: 10.1016/j.jes.2016.01.036. Epub 2016 Aug 18.
Based on previous research, the sampling and analysis methods for phthalate esters (PAEs) were improved by increasing the sampling flow of indoor air from 1 to 4L/min, shortening the sampling duration from 8 to 2hr. Meanwhile, through the optimization of chromatographic conditions, the concentrations of 9 additional PAE pollutants in indoor air were measured. The optimized chromatographic conditions required a similar amount of time for analysis as before, but gave high responsivity, the capability of simultaneously distinguishing 15 kinds of PAEs, and a high level of discrimination between individual sample peaks, as well as stable peak generation. The recovery rate of all gas-phase and particle-phase samples of the 15 kinds of PAEs ranged from 91.26% to 109.42%, meeting the quantitative analysis requirements for indoor and outdoor air sampling and analysis. For the first time, investigation of the concentration levels as well as characteristics of 15 kinds of PAEs in the indoor air from four different traffic micro-environments (private vehicles, busses, taxis and subways) was carried out, along with validation of the optimized sampling and analytical method. The results show that all the 9 additional PAEs could be detected at relatively high pollution levels in the indoor air from the four traffic micro-environments. As none of the pollution levels of the 15 kinds of PAEs in the indoor air from the 4 traffic micro-environments should be neglected, it is of great significance to increase the types of PAEs able to be detected in indoor air.
基于以往研究，通过将室内空气采样流量从1L/min提高到4L/min、将采样持续时间从8小时缩短至2小时，对邻苯二甲酸酯（PAEs）的采样和分析方法进行了改进。同时，通过优化色谱条件，测定了室内空气中另外9种PAE污染物的浓度。优化后的色谱条件所需分析时间与之前相近，但响应度高，能够同时区分15种PAEs，各样本峰之间的分辨能力强，且出峰稳定。15种PAEs的所有气相和颗粒相样本的回收率在91.26%至109.42%之间，满足室内外空气采样和分析的定量分析要求。首次对四种不同交通微环境（私家车、公交车、出租车和地铁）室内空气中15种PAEs的浓度水平及特征进行了调查，并对优化后的采样和分析方法进行了验证。结果表明，在这四种交通微环境的室内空气中，可检测到另外9种PAEs，且污染水平相对较高。由于这四种交通微环境室内空气中15种PAEs的污染水平均不容忽视，因此增加室内空气中可检测到的PAEs种类具有重要意义。
