Definition
How close a measured mass is to the true mass, usually expressed in parts per million. It depends on current calibration, which is why calibration status is a system suitability condition.
Related terms
About mass spectrometry
Terms a reader meets on mass-spectrometric reports from other laboratories, and on confirmatory work sent out. This laboratory has no in-house mass spectrometer, and its certificates carry no mass spectrum.
Electrospray ionisationMass-to-charge ratioCharge stateDeconvolutionObserved massTheoretical massIsotope patternIon suppressionIsobaricStereoisomerRetro-inverso peptide