Summary
Four electronic filters suitable for baseline noise suppression in HPLC detectors were compared for their response and peak distortion characteristics under conventional HPLC conditions. The filters were designed to be white noise equivalent and the types of filter used were lag, lag-lag, critically damped lag and chain, these being representative of common, simple filter configurations. These filters were evaluated for speed of response to an optical step input signal and also for the effects of their level of noise suppression on peak height, retention time, peak asymmetry and apparent column efficiency. The critically damped lag filter was superior to the other filters in almost all respects and its use considerably enhanced detector performance.
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Haddad, P.R., Low, G.K.C. & Heckenberg, A.L. A comparison of some electronic filters for use in noise suppression circuitry of HPLC detectors. Chromatographia 18, 417–423 (1984). https://doi.org/10.1007/BF02262969
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DOI: https://doi.org/10.1007/BF02262969