Managing the uncertainty and limit of quantification of parameters determined by the difference between independently measured values

Many chemical parameters are determined as the difference, d, between two measured values, designated as larger (g) and lower (w) inputs, (d = g – w; where g > w) determined from independent measurements such as:   Magnesium Hardness (mg/L of CaC03) = Total Hardness – Calcium Hardness Chromium (III) = Total Chromium – Chromium (VI)   The uncertainty associated with Read more about Managing the uncertainty and limit of quantification of parameters determined by the difference between independently measured values[…]