当前位置：
X-MOL 学术
›
Anal. Methods
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Sprayed liquid–gas extraction of semi-volatile organophosphate malathion from air and contaminated surfaces
Analytical Methods ( IF 2.7 ) Pub Date : 2018-05-11 00:00:00 , DOI: 10.1039/c8ay00636a Mashaalah Zarejousheghani 1, 2, 3, 4 , Andreas Walte 4, 5, 6 , Helko Borsdorf 1, 2, 3, 4
Analytical Methods ( IF 2.7 ) Pub Date : 2018-05-11 00:00:00 , DOI: 10.1039/c8ay00636a Mashaalah Zarejousheghani 1, 2, 3, 4 , Andreas Walte 4, 5, 6 , Helko Borsdorf 1, 2, 3, 4
Affiliation
|
In this study, a new air sampling method termed sprayed liquid–gas extraction (SLGE) was developed for semi-volatile organic compounds. Water droplets with an average diameter of less than 10 μm were created, using a flow blurring nebulizer from distilled water and the gas-phase sample. This allowed the fast, simple and highly-efficient enrichment of trace levels of the widely used organophosphate insecticide malathion, which is also an accepted simulant for the potent nerve-agent VX. After spraying, extraction and solvent evaporation, the collected malathion molecules were dissolved in 100 μL organic solvent and analyzed using gas chromatography-mass spectrometry. Different parameters including SLGE duration, gas and extracting-agent flow-rate, humidity and memory effect were evaluated and optimized. The method was compared with standard air-sampling tubes containing XAD-2 and XAD-4 polymers and also the liquid-trapping method. Combining simplicity with cost-effectiveness, the SLGE method shows outstanding extraction efficiency compared to the standard methods. Using the optimized method, the limits of detection (LOD) and quantification (LOQ) were determined to be 7.53 and 25.11 ng L−1, respectively. The developed method was compared to a standard extraction with XAD-2 tube which was run in parallel to the SLGE. These methods were used to extract a mixture of malathion, 2,4-dinitrotoluene (explosive marker), 4-chloro-3-methylphenol, carbaryl (insecticide), dimethoate (organophosphate insecticide), atrazine (herbicide) and permethrin (insecticide) in synthetic air. These compounds were also deposited on a steel plate and a composite building material and the air above these materials was sampled.
中文翻译：
从空气和受污染的表面中通过喷雾液气萃取半挥发性有机磷酸马拉硫磷
在这项研究中，针对半挥发性有机化合物开发了一种新的空气采样方法，称为喷雾液-气萃取（SLGE）。使用蒸馏水和气相样品的流动模糊雾化器创建平均直径小于10μm的水滴。这可以快速，简单和高效地富集痕量的广泛使用的有机磷酸酯杀虫剂马拉硫磷，这也是强效神经毒剂VX公认的模拟物。喷雾，萃取和溶剂蒸发后，将收集的马拉硫磷分子溶解在100μL有机溶剂中，并使用气相色谱-质谱法进行分析。评估并优化了SLGE持续时间，气体和萃取剂流速，湿度和记忆效应等不同参数。将该方法与包含XAD-2和XAD-4聚合物的标准空气采样管以及液体捕获方法进行了比较。结合了简单性和成本效益，SLGE方法与标准方法相比具有出色的提取效率。使用优化方法确定的检测限（LOD）和定量限（LOQ）为7.53和25.11 ng L-1。将开发的方法与XAD-2管与SLGE平行运行的标准提取方法进行了比较。这些方法用于提取马拉硫磷，2,4-二硝基甲苯（爆炸性标记），4-氯-3-甲基苯酚，西维因（杀虫剂），乐果（有机磷酸酯杀虫剂），at去津（除草剂）和苄氯菊酯（杀虫剂）的混合物。合成空气。这些化合物也沉积在钢板和复合建筑材料上，并对这些材料上方的空气进行采样。
更新日期：2018-05-11
中文翻译：
从空气和受污染的表面中通过喷雾液气萃取半挥发性有机磷酸马拉硫磷
在这项研究中，针对半挥发性有机化合物开发了一种新的空气采样方法，称为喷雾液-气萃取（SLGE）。使用蒸馏水和气相样品的流动模糊雾化器创建平均直径小于10μm的水滴。这可以快速，简单和高效地富集痕量的广泛使用的有机磷酸酯杀虫剂马拉硫磷，这也是强效神经毒剂VX公认的模拟物。喷雾，萃取和溶剂蒸发后，将收集的马拉硫磷分子溶解在100μL有机溶剂中，并使用气相色谱-质谱法进行分析。评估并优化了SLGE持续时间，气体和萃取剂流速，湿度和记忆效应等不同参数。将该方法与包含XAD-2和XAD-4聚合物的标准空气采样管以及液体捕获方法进行了比较。结合了简单性和成本效益，SLGE方法与标准方法相比具有出色的提取效率。使用优化方法确定的检测限（LOD）和定量限（LOQ）为7.53和25.11 ng L-1。将开发的方法与XAD-2管与SLGE平行运行的标准提取方法进行了比较。这些方法用于提取马拉硫磷，2,4-二硝基甲苯（爆炸性标记），4-氯-3-甲基苯酚，西维因（杀虫剂），乐果（有机磷酸酯杀虫剂），at去津（除草剂）和苄氯菊酯（杀虫剂）的混合物。合成空气。这些化合物也沉积在钢板和复合建筑材料上，并对这些材料上方的空气进行采样。
京公网安备 11010802027423号