FIELD: chemistry.
SUBSTANCE: sorbent contains 3-glycidyloxypropyl-silicagel which is treated with thiosemicarbazide during catalysis with perchloric acid in a medium of boiling methanol for 8 hours. The amount of functional groups covalently bonded on the surface is 0.49 mmol/g.
EFFECT: improved sorption properties; the sorbent is obtained using a simpler method.
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