A novel liquid chromatography detector based on a dielectric barrier discharge molecular emission spectrometer with online microwave-assisted hydrolysis for determination of dithiocarbamates
文献类型： 外文期刊
作者： Han, Bingjun 1 ; Li, Ya 1 ; Qian, Bing 1 ; He, Yan 1 ; Peng, Lixu 1 ; Yu, Huamei 4 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Anal & Testing Ctr, Hainan Prov Key Lab Qual & Safety Trop Fruits & V, Haikou 571101, Hainan, Peoples R China
2.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Hainan, Peoples R China
3.Hainan Univ, Coll Environm & Plant Protect, Haikou 570228, Hainan, Peoples R China
4.Hainan Univ, Coll Environm & Plant Protect, Haikou 570
期刊名称：ANALYST （ 影响因子：4.616； 五年影响因子：4.232 ）
ISSN： 0003-2654
年卷期： 2018 年 143 卷 12 期
页码：
收录情况： SCI
摘要： A novel detector for liquid chromatography (LC) for the determination of dithiocarbamate (DTC) fungicides is presented with a miniaturized dielectric barrier discharge-microplasma molecular emission spectrometer and an online microwave-assisted hydrolysis reactor. DTCs in the sample/standard solutions together with SnCl2 were pumped to the reactor to be converted to CS2 with high efficiency, which was then separated from the liquid phase and transformed for the detection of the specific molecular emission at 257.49 nm by the spectrometer. Under optimized conditions, the performance of this new detector was evaluated by its determination of different types of DTC including mancozeb, thiram, zineb, propineb, and metiram, and the limit of detection (LOD) values were found to be in the range 0.1-1.0 g mL(-1). The results from 20 test vegetable and fruit samples determined with the proposed method agreed well with those obtained using the standard headspace gas chromatography-electron capture detector (GC-ECD) method. Preliminary experimental results showed that the proposed method provided slightly higher LOD values than those obtained using GC-ECD. Most importantly, the new LC detector could detect each DTC chemical, whereas the traditional method could not distinguish between analytes of different subclasses of DTC.
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