242ANALESRANFwwwanalesranfcomInterferenciasporbiotinaenvariosinmunoensayosdeelectroquimioluminiscenciaJoséLuisMartín-CalderónAnRealAcadFarmvol87nº3(2021)·pp239-246Table2RelativebiasforeachbiotinconcentrationatthreedifferentlevelsofanalyteAsterisksindicatethelevelwhichproducessignificantinterference