Method for magnetic component extraction in soil and strong/weak magnetic component separation in extract
A weak magnetic and extractive technology, applied in the field of soil pollution monitoring, can solve the problems of easy error, complicated operation, long test cycle, etc., and achieve the effect of simple steps and strong operability
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[0021] a. Pretreatment of the soil samples to be extracted: Air-dry the collected soil samples at room temperature, grind them with a ceramic mortar, and pass through a 10-mesh sieve to remove debris such as whetstones, cuttings and plant roots in the soil samples. Take by weighing 50g the soil sample that crosses 10 mesh sieves and place in beaker-1, add 0.5mol / L sodium hexametaphosphate ((NaPO 3 ) 6 ) 20ml, continue to add distilled water to 250ml, stir evenly with a glass rod, soak for about 12h.
[0022] b. Extraction of the full amount of magnetic components: Wrap the strong magnetic magnet with plastic wrap and place it in beaker-1, stir the mixed soil sample with a glass rod, shake the magnet to make it absorb the magnetic particles in the soil sample, and stick to the surface of the magnet when it is absorbed After a layer of magnetic particles, take out the magnet, and wash the magnetic components into the beaker-2 with distilled water; repeat the above operation in ...
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