Department of Analytical Chemistry and Organic Chemistry, Universitat Rovira i Virgili, Marcel·lí Domingo s/n, Sescelades Campus, Tarragona 43007, Spain.
J Chromatogr A. 2013 Aug 16;1303:76-82. doi: 10.1016/j.chroma.2013.06.025. Epub 2013 Jun 19.
A method based on thermal desorption-gas chromatography-mass spectrometry (TD-GC-MS) has been developed to determine four organophosphate esters, seven phthalate esters, and bis(2-ethylhexyl) adipate in the gas phase from harbour and urban air samples. The method involves the sampling of 1.5L of air in a Tenax TA sorbent tube followed by thermal desorption (using a Tenax TA cryogenic trap) coupled to gas chromatography-mass spectrometry. The repeatability of the method expressed as %RSD (n=3) is less than 15% and the MQLs are between 0.007μgm(-3) (DMP, TBP, BBP, TPP and DnOP) and 6.7μgm(-3) (DEHP). The method was successfully applied in two areas (urban and harbour) testing two and three points in each one, respectively. Some of these compounds were found in both urban and harbour samples. Di-(2-ethylhexyl)phthalate was the most abundant compound found in both areas at concentration levels between 6.7μgm(-3) and 136.4μgm(-3). This study demonstrates that thermal desorption is an efficient method for the determination of these semi-volatile compounds in the gas phase fraction of air samples.
一种基于热脱附-气相色谱-质谱联用（TD-GC-MS）的方法已被开发用于测定港湾和城市空气样品中气相中的四种有机磷酸酯、七种邻苯二甲酸酯和己二酸二（2-乙基己基）酯。该方法涉及用 Tenax TA 吸附管采集 1.5L 空气，然后进行热脱附（使用 Tenax TA 低温阱），并与气相色谱-质谱联用。方法的重复性表示为 %RSD（n=3），小于 15%，最低检测限（MQL）在 0.007μg/m³（DMP、TBP、BBP、TPP 和 DnOP）至 6.7μg/m³（DEHP）之间。该方法成功应用于两个区域（城市和港湾），每个区域测试两个和三个点。在这两个区域的空气样本中都发现了其中一些化合物。在这两个区域中，二（2-乙基己基）邻苯二甲酸酯是含量最丰富的化合物，浓度在 6.7μg/m³至 136.4μg/m³之间。本研究表明，热脱附是一种有效的方法，可用于测定空气样品气相中这些半挥发性化合物。
