You should get better HPLC system suitability. You can not consider only single parameter. Maybe you should consider the follwing parameters at the same time according to USP requirments: --Capacity factor =(T2-T0)/T0 should be more than 1.0 but less than 10, The better range is 2 - 7; --Tailing factor=( 5% Peak Width)/2f not more than (NMT) 2.0; --Column Efficiency N =16* Square of (Retention time of analyte / peak width measured at baseline of the extrapolated sides to baseline) = L/H should be more than 2000 or other specified value; --Resolution R between two peaks should be more than 2.0
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