Properties:
RelatedCategories | Analytical/Chromatography,CHIRALPAKHSA,ChiralHPLCColumns,HPLC,Protein-basedChiralHPLCColumns |
Description:
Generaldescription
CHIRALPAKHSA,whichuseshumanserumalbuminasthechiralselector,ishighlyselectiveforacidicracemates,preferablyweakandstrongacids,zwitterionicandnon-protolytic(neutral)compounds.Phosphatebuffers(normally0.01-0.1M,pH5-7)withadditionoforganicmodifiersareusedasmobilephases.Enantioselectivityandretentioncanberegulatedbychangingthemobilephasecomposition.However,theprimaryuseofCHIRALPAKHSAisforfastdrug/proteinbindingstudies(1).Tocalculatethe%proteinbinding,measuretheretentiontimeofanunretainedcompound(t0)andthecompoundofinterest(tr)ontheCHIRALPAKHSAcolumn.Thenusethecapacityfactorequation:
k=(tr-t0)/tr
tocalculatethe%proteinbinding(P):
P=100k/(k+1)
Differenttypesofmobilephasescanbeused.Amobilephaseconsistingof6%2-propanolin20mMpotassiumphosphatebuffer,pH7.0givesdataingoodagreementwithliteraturedata.Themobilephaseconditionsshouldbechosentosuitthedrugstobetested,i.e.,forhighproteinbindingdrugsamobilephasewithhigherelutingstrengthmightbeneededinordertoreduceretentiontimes.
(1)Goodman,A.;Gilman,A.G.ThePharmacologicalBasisofTherapeutics,9thEdition,McGraw-Hill:NewYork,1996;pp1712-1792.
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LegalInformation
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