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A Novel Liquid Chromatography Detector based Dielectric Barrier Discharge Molecular Emission Spectrometer with Online Microwave-Assisted Hydrolysis for Determination of Dithiocarbamates

Abstract

A novel detector of liquid chromatography (LC) for the determination of dithiocarbamate fungicides (DTCs) was presented by a miniaturized dielectric barrier discharge–microplasma molecular emission spectrometer and an online microwave-assisted hydrolysis reactor. DTCs in the sample/standard solution together with SnCl2 were pumped to the reactor to convert to CS2 with a 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 the optimized conditions, the performance of this new detector was evaluated by the determination of different types of DTCs including mancozeb, thiram, zineb, propineb, and metiram, and the limits of detection (LODs) were found in the range of 0.1–1.0 µg mL-1. The result of 20 test vegetable and fruit samples determined with the proposed method agreed well with those obtained by the standard headspace gas chromatography–electron capture detector (GC-ECD) method. Preliminary experiment results showed that the proposed provided slightly higher LODs than those obtained by GC-ECD. Most importantly, the new LC detector could detect each chemical of the DTCs, whereas the traditional method could not distinguish the analytes between the subclasses of the DTCs.

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Publication details

The article was received on 02 Apr 2018, accepted on 02 May 2018 and first published on 03 May 2018


Article type: Paper
DOI: 10.1039/C8AN00613J
Citation: Analyst, 2018, Accepted Manuscript
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    A Novel Liquid Chromatography Detector based Dielectric Barrier Discharge Molecular Emission Spectrometer with Online Microwave-Assisted Hydrolysis for Determination of Dithiocarbamates

    B. Han, Y. Li, B. Qian, Y. He, L. Peng and H. Yu, Analyst, 2018, Accepted Manuscript , DOI: 10.1039/C8AN00613J

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