Method for rapidly decomposing high silicon dioxide Cd polluted rice soil
A technology of silica and rice, applied in the field of analytical chemistry, can solve the problems of reducing pretreatment time, slow digestion of silica, and speeding up the digestion process, so as to reduce reaction time, save time and facilitate digestion
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Embodiment 1
[0027] Weigh 0.242 grams of soil sample, measure 1 milliliter of deionized water, 10 milliliters of 65% nitric acid, 10 milliliters of 20% hydrofluoric acid, and 2 milliliters of 72% perchloric acid, put them into a polytetrafluoroethylene tube, and place in a digestion furnace 15 minutes from room temperature to 110°C, 110°C for 20 minutes, 15 minutes to 150°C, 150°C for 30 minutes, 10 minutes to 180°C, 180°C until the liquid evaporates to dryness, then add 65% nitric acid to dissolve Digestion products continue to evaporate for 1-2 minutes while nitric acid dissolves. The total time for digestion is 2.5 hours.
Embodiment 2
[0032] Weigh 0.454 grams of soil sample, measure 1 milliliter of deionized water, 10 milliliters of 65% nitric acid, 10 milliliters of 20% hydrofluoric acid, and 2 milliliters of 72% perchloric acid, put them in a polytetrafluoroethylene tube, and place in a digestion furnace 15 minutes from room temperature to 110°C, 110°C for 20 minutes, 15 minutes to 150°C, 150°C for 30 minutes, 10 minutes to 180°C, 180°C until the liquid evaporates to dryness, then add 65% nitric acid to dissolve Digestion products continue to evaporate for 1-2 minutes while nitric acid dissolves. The total time for digestion is 4 hours.
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