realized in role of molecular entity atom analyte role Feb 10, 2009. changes after discussion at OBI Consortium Workshop Feb 2-6, 2009. accepted as core term. GROUP: Role Branch Glucose in blood (measured in an assay to determine the concentration of glucose). OBI analyte role interestingly, an analyte is still an analyte even if it is not detected. for this reason it does not bear a specified input role pH (technically the inverse log of [H+]) may be considered a quality; this remains to be tested. qualities such as weight, color are not assayed but measured, so they do not fall into this category. A measurand role borne by a molecular entity or an atom and realized in an analyte assay which achieves the objective to measure the magnitude/concentration/amount of the analyte in the entity bearing evaluant role. analyte assay measurand role ready for release