chemical preparations in the nature of treated silica columns and cartridges used to create selective adsorbency for pharmaceutical purposes

'adsorb':16 'cartridg':11 'chemic':1 'column':9 'creat':14 'natur':5 'pharmaceut':18 'prepar':2 'purpos':19 'select':15 'silica':8 'treat':7 'use':12

columns and tubes for use in medical and laboratory analyses

'analys':10 'column':1 'laboratori':9 'medic':7 'tube':3 'use':5

treated silica in column or cartridge form for analyses in laboratories

'analys':9 'cartridg':6 'column':4 'form':7 'laboratori':11 'silica':2 'treat':1

DUOZORB

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