A kind of detection method of fenthion content in sorghum planting soil
A detection method, the technology of fenthion, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of farmers' economic loss, sorghum phytotoxicity, sorghum production reduction, etc., and achieve the effect of avoiding economic loss and high accuracy
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Embodiment 1
[0025] A detection method for fenthion content in sorghum planting soil, the steps are as follows:
[0026] 1) Processing of samples:
[0027] 1.1) Weigh an appropriate amount of soil sample into a conical flask, add 5ml of 1mol / L hydrochloric acid and 5ml of methanol, shake well, soak for 5 hours, shake mechanically for 40 minutes, and centrifuge at 5000rmp for 10 minutes, filter, and put the filtrate into the liquid separation In the funnel, add 10ml of methanol to the residue, shake for 30min, filter, and combine the filtrate into the separatory funnel;
[0028] 1.2) Add 120ml of 8% NaCl aqueous solution and 80ml of petroleum ether to the filtrate, shake and let stand to separate;
[0029] 1.3) Put the lower aqueous phase of the separatory funnel into another separatory funnel, back-extract the organic phase once with 80ml of 8% NaCl aqueous solution, discard the petroleum ether solution, combine the aqueous solutions, add dichloromethane for three extractions, and obtain ...
Embodiment 2
[0042] A detection method for fenthion content in sorghum planting soil, the steps are as follows:
[0043] 1) Processing of samples:
[0044] 1.1) Weigh an appropriate amount of soil samples into a conical flask, add 5ml of 1mol / L hydrochloric acid and 5ml of methanol, shake well, soak for 6 hours, shake mechanically for 50 minutes, and centrifuge at 000rmp for 15 minutes, filter, and put the filtrate into the liquid separation In the funnel, add 15ml of methanol to the residue, shake for 40min, filter, and combine the filtrate into the separatory funnel;
[0045] 1.2) Add 120ml of 8% NaCl aqueous solution and 80ml of petroleum ether to the filtrate, shake and let stand to separate;
[0046] 1.3) Put the lower aqueous phase of the separatory funnel into another separatory funnel, back-extract the organic phase once with 80ml of 8% NaCl aqueous solution, discard the petroleum ether solution, combine the aqueous solutions, add dichloromethane for three extractions, and obtain ...
Embodiment 3
[0059] A detection method for fenthion content in sorghum planting soil, the steps are as follows:
[0060] 1) Processing of samples:
[0061] 1.1) Weigh an appropriate amount of soil sample into an Erlenmeyer flask, add 5ml of 1mol / L hydrochloric acid and 5ml of methanol, shake well, soak for 5.5h, shake mechanically for 45min, and centrifuge at 5500rmp for 12min, filter, and put the filtrate into a separate In the liquid funnel, add 12ml of methanol to the residue part, shake for 35min, filter, and combine the filtrate into the separating funnel;
[0062] 1.2) Add 120ml of 8% NaCl aqueous solution and 80ml of petroleum ether to the filtrate, shake and let stand to separate;
[0063] 1.3) Put the lower aqueous phase of the separatory funnel into another separatory funnel, back-extract the organic phase once with 80ml of 8% NaCl aqueous solution, discard the petroleum ether solution, combine the aqueous solutions, add dichloromethane for three extractions, and obtain dichloro...
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