Determination of an analyte

摘要

A method and kit are disclosed for recalibrating a factory-prepared relationship between concentration and expected signal Rexp produced by an analyzer. The method and kit use two or three calibrators at the field to obtain an actual signal Ract for the two calibrators Clow and Chigh, for example, and these two actual signals are used to create a ratio of Ractlow/Rexplow and Racthigh/Rexphigh. The first of these is used to correct the expected signals for concentrations below the lower calibrator concentration, and the second is used to correct expected signals for concentrations above the higher calibrator concentration, producing pseudosignals PSlow and PShigh. A straight-line relationship is applied between the corrected PSlow and PShigh, and that relationship is used for concentrations between Clow and Chigh.