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Emission of methyl bromide (MeBr) from soil was implicated in stratospheric ozone depletion. To determine multi analysis of alternatives fumigants for MeBr, this paper describes the methods of analysis in water and soil. The MeBr, methyl iodide (MeI), propargyl bromide (PBr), cis 1, 3-dichloropropene (cis 1, 3-D), trans 1, 3-dichloropropene (trans 1, 3-D) and chloropicrin (CP) are separated on the base line on GC-ECD at three column of AT+DB+DB (90 m) with temperature programing of 35℃ → 110℃ on GC-ECD. The relative retention time for MeBr, MeI, PBr, cis 1, 3-D, trans 1, 3-D and CP is 1.0, 1.4, 2.3, 3.2, 3.6 and 3.7, respectively. The detection limit for MeBr, MeI, PBr, cis 1, 3-D, trans 1, 3-D and CP is 469 pg, 5 pg, 21 pg, 79 pg, 101 pg and 5 pg, respectively. Recovery of MeBr, MeI, PBr, cis 1, 3-D, trans 1,3-D and CP in water added 150 ppm fumigants were 81%, 96%, 95%, 97%, 98% and 99%, respectively. Recovery of MeBr, MeI, PBr, cis 1, 3-D, trans 1,3-D and CP in soil added 150ppm fumigants were 56%, 84%, 85%, 81%, 87% and 88%, respectively. |
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