Single Method On-line Analyzers - Metrohm

ADI 2016 / 2018 / 2019ADI 2018Ion-AnalyzerAnalysis techniqueThe ADI 2018 Ion-Analyzer performs a dynamic standardaddition method by means of a high precision burette and highperformanceIon Selective Electrodes (ISE). These methods adaptthe standard addition volume to the actual sample concentrationby means of a dynamic differential approach. Moreover it takesinto account ISE slope values over several ranges. This meansthat ISE’s can be used to their ultimate low (or high) measuringrange which is mostly non-linear. Finally an accompanying temperaturemeasurement eliminates possible temperature effectson the analysis results.Dynamic Standard AdditionThe above described method brings important benefits making ion selective measurements a robuston-line analysis approach with the following features:Intrinsic result validation.Elimination of sample matrix effects.Automatic ISE calibration.Wide measuring range of approx. 2.5 decades.Easy adaptable measuring range by choosing thestandard concentration.Significant reagent usage reduction; only buffer andstandard solution (typical 0.5 to 1 ml per analysis).Automatic temperature compensation.E (mV)slope 1slope 2slope 3slope 40.10.32 1 3.2 10log concentration