Investigation of the photochemical behaviour of pyrethroids lacking the cyclopropane ring by photo-solid-phase microextraction and gas chromatography/mass spectrometry.
Investigation of the photochemical behaviour of pyrethroids lacking the cyclopropane ring by photo-solid-phase microextraction and gas chromatography/mass spectrometry.
复制标题
通过光固相微萃取和气相色谱/质谱法研究缺乏环丙烷环的拟除虫菊酯的光化学行为。
DOI：
10.1002/rcm.4301
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
M. Lores
中科院分区：
文献类型：
--
作者：
M. Fernández;M. Llompart;C. García;T. Dagnac;M. Lores
采用气相色谱-质谱联用技术（GC/MS）研究了两种不含环丙烷环的拟除虫菊酯（氟氰菊酯和氰戊菊酯）在紫外光降解过程中产生的副产物的表征。对20种光产物进行了初步鉴定，主要依据是实验质谱解译或参考质谱解译。其中一些化合物以前没有被检测到。此外，由于某些光产物的潜在毒性，它们的产生可能是一个值得关注的问题。还提出了相应的光降解途径，包括中间自由基的假设。这些光降解研究是通过光固相微萃取（photo-SPME）进行的，其中SPME纤维在从水溶液中提取目标分析物后暴露在光下。通过获得不同照射时间的离子色谱图和相应的质谱，监测了所研究的拟除虫菊酯的降解动力学和原位生成的光产物的光形成-光降解曲线。
The characterization of by-products arising from the UV photodegradation of two insecticide pyrethroids lacking the cyclopropane ring (flucythrinate and fenvalerate) has been investigated by gas chromatography coupled with mass spectrometry (GC/MS). Twenty photoproducts were tentatively identified mainly based on the interpretation of the experimental mass spectra or by using reference mass spectra. Some of these compounds had not previously been detected. Furthermore, the generation of some of the photoproducts might be a matter for concern due to their potential toxicity. The corresponding photodegradation routes, including postulation of the intermediate radicals, have also been proposed. These photodegradation studies were performed by photo-solid-phase microextraction (photo-SPME) in which the SPME fibre was exposed to light after extraction of the target analytes from aqueous solutions. The degradation kinetics of the investigated pyrethroids and the photoformation-photodegradation curves of the photoproducts generated in situ were also monitored through the ion chromatograms obtained for different irradiation times and the corresponding mass spectra.
河流领域的测量和测量，
DOI：
--
发表时间：
2021
期刊：
影响因子：
--
作者：
Shimizu Yuma;Khayyer Abbas;Gotoh Hitoshi;椿 涼太
通讯作者：
椿 涼太