Dimethyl disulphide residue analysis and degradation kinetics determination in soil using gas chromatography-mass spectrometry

文献类型: 外文期刊

第一作者: Wang, Qiuxia

作者: Wang, Qiuxia;Liu, Pengfei;Fang, Wensheng;Yan, Dongdong;Cao, Aocheng

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关键词: Dimethyl disulphide;fumigant;degradation;gas chromatography-mass spectrometry;soil

期刊名称:INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY ( 影响因子:2.826; 五年影响因子:2.215 )

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收录情况: SCI

摘要: Dimethyl disulphide (DMDS) is a volatile sulphur compound and is used as a new type of soil fumigant. The objective of this study was to develop an effective method to extract and analyse DMDS residue in soil, then determine the degradation kinetics of DMDS in soil using the above method. The results showed that DMDS extraction from soil by ethyl acetate under static conditions for 60min gave the best recovery. The extracted DMDS was analysed by gas chromatography-mass spectrometry (GC-MS), and the limit of quantification of DMDS in the soil was 5g/kg. The average recoveries of the DMDS at five different concentrations were in the range of 65.4-120.1% with all intra- and inter-day relative standard deviation less than 19.1 and 14.8, respectively. The degradation rates of DMDS in different soils were significantly different and were strongly influenced by the soil pH. The results in the present study will be useful for DMDS environmental behaviour study in future.

分类号: X

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