Faced with a particular customer problem, the laboratory must first set the analytical requirement which defines a method that solves that problem. The main requirements are the following

  • Scope - determination of a parameter (concentration of an analyte) in matrices,,,
  • Measuring interval - also called range
  • Precision - we often focus on a requirement on within-lab reproducibility s(Rw)
  • Trueness - expressed as a requirement on maximum bias
  • Ruggedness
  • Measurement uncertainty

General requirement and specific for the environmental sector can be found here