Capillary action-based in situ sampling-microextraction device for allelochemicals in soil
A technology of capillary action and extraction device, which is applied in the direction of sampling device, measuring device, instrument, etc.
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Embodiment 1
[0029] like figure 1 , figure 2 As shown, the drill bit 1 is connected to the sampling tube 2 through threads, and the sealed double-ended stud 3 at the other end of the sampling tube 2 is connected to the tail pipe 5, and the outer end of the tail pipe 5 is provided with a sealing end cap 6; when applied to solid-phase microextraction , in-situ sampling of soil allelochemicals based on capillary action-a small hole is reserved on the sealing end cover 6 of the micro-extraction device, and the channel 4 set in the middle of the tail pipe 5 can allow the solid-phase extraction fiber 9 to pass through; During phase microextraction, in-situ sampling of soil allelochemicals based on capillary action-microextraction device puts a bent U-shaped hollow fiber 7 in the sampling tube 2, and connects the micro sample injector 8 during extraction. At this time, the channel 4 Used as an insertion channel for the cleaning syringe 11. Among them, the sampling pipe 2 is not only a collecto...
Embodiment 2
[0033]Taking capsicum as a model plant, the in-situ sampling-microextraction device based on capillary action of soil allelochemicals was placed in five pots A, B, C, D, and E, and pot E was the soil where no capsicum was planted, as a treatment control . Three days before the transplanting of the seedlings, add 2L of water per pot per day, and then add 1L of water per day to help the tubes absorb the soil solution. After continuous culture and collection for three weeks, sampling experiment: solid phase microextraction, the solid phase The extraction fiber 9, under the protection of the micro-extraction protection needle tube 10, passes through the rubber double-ended stud 3, inserts the sampling tube 2 and extends the extraction fiber 9, after the extraction is completed, shrinks back to the extraction fiber 9, and pulls out the micro-extraction The device is directly used for sample injection of instruments such as GC-MS. The small hole on the sealing end cap 6 is blocked b...
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