AlthoughtheChromolith?columnsarewellknownfortheirrobustnessandlongevity,guardcolumnsareavailabletoprolongtheLifespanofChromolith?analyticalcolumnsevenfurther.Theseguardcartridgesrequireaspecialholder.
Disposal
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Chromatographicresidues:Aggressive,explosive(e.g.peroxides)ortoxicsubstancesinchromatographiclayersorsorbentsmustbeeliminatedusingsuitablemethods(washingout,elution)priortodisposal.Thesolventsusedforelutioncaninmanycasesbereutilized.Largerquantitiesofsorbents(e.g.fromcolumns)shouldbefreedfromsolvents(filtration,drying)andpackedintorip-resistantplasticsachets;containerI.TLCcarriermaterialsandcolumnsshouldbedisposedoftogetherwiththecorrespondingwastematerials(aluminium,glass,plastic);containerK.