An automated analyzer system for biological samples, comprising: a sample processing system; a controller configured to: - receive a selection of one of multiple workflows for determining a presence and/or concentration of an analyte in a biological sample; - prompt the automated analyzer system to automatically carry out the selected workflow using the sample processing system; and - output a result classifying the biological sample; and wherein each of the multiple workflows is assigned to a value or a range of values of a measured parameter indicative of a presence and/or concentration of the analyte characterized in that each of the multiple workflows further defines a plurality of steps to be carried out by the automated analyzer system, the plurality of steps including: - preparing at least a first and a second sample aliquot from a biological sample with particular levels of dilution defined in the respective workflow, the first sample aliquot being a confirmation aliquot and the second sample aliquot being a control aliquot (103; 104); - adding predefined quantities of one or more agents to specifically determine the presence of said analyte to the confirmation aliquot and the control aliquot; - determining a parameter indicative of a presence and/or concentration of the analyte in the confirmation aliquot and in the control aliquot; - determining a relationship of the determined parameters of the analyte in the confirmation aliquot and in the control aliquot; and - based on the determined relationship, classifying the biological sample in one of a plurality of classes regarding the presence of the analyte (107; 108), wherein the confirmation aliquot includes a neutralization agent to reduce an effect of an agent to determine the presence of the analyte, and wherein the control aliquot includes a substance which does not substantially change the characteristics of the second sample aliquot. a sample processing system; a controller configured to: - receive a selection of one of multiple workflows for determining a presence and/or concentration of an analyte in a biological sample; - prompt the automated analyzer system to automatically carry out the selected workflow using the sample processing system; and - output a result classifying the biological sample; and - receive a selection of one of multiple workflows for determining a presence and/or concentration of an analyte in a biological sample; - prompt the automated analyzer system to automatically carry out the selected workflow using the sample processing system; and - output a result classifying the biological sample; and wherein each of the multiple workflows is assigned to a value or a range of values of a measured parameter indicative of a presence and/or concentration of the analyte characterized in that each of the multiple workflows further defines a plurality of steps to be carried out by the automated analyzer system, the plurality of steps including: - preparing at least a first and a second sample aliquot from a biological sample with particular levels of dilution defined in the respective workflow, the first sample aliquot being a confirmation aliquot and the second sample aliquot being a control aliquot (103; 104); - adding predefined quantities of one or more agents to specifically determine the presence of said analyte to the confirmation aliquot and the control aliquot; - determining a parameter indicative of a presence and/or concentration of the analyte in the confirmation aliquot and in the control aliquot; - determining a relationship of the determined parameters of the analyte in the confirmation aliquot and in the control aliquot; and - based on the determined relationship, classifying the biological sample in one of a plurality of classes regarding the presence of the analyte (107; 108), - preparing at least a first and a second sample aliquot from a biological sample with particular levels of dilution defined in the respective workflow, the first sample aliquot being a confirmation aliquot and the second sample aliquot being a control aliquot (103; 104); - adding predefined quantities of one or more agents to specifically determine the presence of said analyte to the confirmation aliquot and the control aliquot; - determining a parameter indicative of a presence and/or concentration of the analyte in the confirmation aliquot and in the control aliquot; - determining a relationship of the determined parameters of the analyte in the confirmation aliquot and in the control aliquot; and - based on the determined relationship, classifying the biological sample in one of a plurality of classes regarding the presence of the analyte (107; 108), wherein the confirmation aliquot includes a neutralization agent to reduce an effect of an agent to determine the presence of the analyte, and wherein the control aliquot includes a substance which does not substantially change the characteristics of the second sample aliquot.