RESOLUTION PARAMETER FOR MULTIDETECTION CHROMATOGRAPHY

A resolution parameter to be used for multidetection chromatography is derived. Unlike traditional resolution parameters, the parameter deve loped in this work can be obtained prior to curve resolution. A rank m ap providing the number of analytes in every local region of the profi le is first estimated. The overall resolution is defined as the ratio between single-analyte regions and regions with one or more analytes. A resolution parameter for each analyte separately is obtained by the same kind of approach. The performance of the resolution parameter for suggesting successful/failed resolution, using alternating regression (AR), is assessed on simulated GC-IR and LC-DAD profiles. The influen ce of noise, number and relative concentration of analytes, and spectr al and chromatographic overlap on the resolution parameter is determin ed by means of orthogonal design and partial least-squares regression.